/*  Prototype JavaScript framework, version 1.6.0.3
 *  (c) 2005-2008 Sam Stephenson
 *
 *  Prototype is freely distributable under the terms of an MIT-style license.
 *  For details, see the Prototype web site: http://www.prototypejs.org/
 *
 *--------------------------------------------------------------------------*/

var Prototype = {
  Version: '1.6.0.3',

  Browser: {
    IE:     !!(window.attachEvent &&
      navigator.userAgent.indexOf('Opera') === -1),
    Opera:  navigator.userAgent.indexOf('Opera') > -1,
    WebKit: navigator.userAgent.indexOf('AppleWebKit/') > -1,
    Gecko:  navigator.userAgent.indexOf('Gecko') > -1 &&
      navigator.userAgent.indexOf('KHTML') === -1,
    MobileSafari: !!navigator.userAgent.match(/Apple.*Mobile.*Safari/)
  },

  BrowserFeatures: {
    XPath: !!document.evaluate,
    SelectorsAPI: !!document.querySelector,
    ElementExtensions: !!window.HTMLElement,
    SpecificElementExtensions:
      document.createElement('div')['__proto__'] &&
      document.createElement('div')['__proto__'] !==
        document.createElement('form')['__proto__']
  },

  ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script>',
  JSONFilter: /^\/\*-secure-([\s\S]*)\*\/\s*$/,

  emptyFunction: function() { },
  K: function(x) { return x }
};

if (Prototype.Browser.MobileSafari)
  Prototype.BrowserFeatures.SpecificElementExtensions = false;


/* Based on Alex Arnell's inheritance implementation. */
var Class = {
  create: function() {
    var parent = null, properties = $A(arguments);
    if (Object.isFunction(properties[0]))
      parent = properties.shift();

    function klass() {
      this.initialize.apply(this, arguments);
    }

    Object.extend(klass, Class.Methods);
    klass.superclass = parent;
    klass.subclasses = [];

    if (parent) {
      var subclass = function() { };
      subclass.prototype = parent.prototype;
      klass.prototype = new subclass;
      parent.subclasses.push(klass);
    }

    for (var i = 0; i < properties.length; i++)
      klass.addMethods(properties[i]);

    if (!klass.prototype.initialize)
      klass.prototype.initialize = Prototype.emptyFunction;

    klass.prototype.constructor = klass;

    return klass;
  }
};

Class.Methods = {
  addMethods: function(source) {
    var ancestor   = this.superclass && this.superclass.prototype;
    var properties = Object.keys(source);

    if (!Object.keys({ toString: true }).length)
      properties.push("toString", "valueOf");

    for (var i = 0, length = properties.length; i < length; i++) {
      var property = properties[i], value = source[property];
      if (ancestor && Object.isFunction(value) &&
          value.argumentNames().first() == "$super") {
        var method = value;
        value = (function(m) {
          return function() { return ancestor[m].apply(this, arguments) };
        })(property).wrap(method);

        value.valueOf = method.valueOf.bind(method);
        value.toString = method.toString.bind(method);
      }
      this.prototype[property] = value;
    }

    return this;
  }
};

var Abstract = { };

Object.extend = function(destination, source) {
  for (var property in source)
    destination[property] = source[property];
  return destination;
};

Object.extend(Object, {
  inspect: function(object) {
    try {
      if (Object.isUndefined(object)) return 'undefined';
      if (object === null) return 'null';
      return object.inspect ? object.inspect() : String(object);
    } catch (e) {
      if (e instanceof RangeError) return '...';
      throw e;
    }
  },

  toJSON: function(object) {
    var type = typeof object;
    switch (type) {
      case 'undefined':
      case 'function':
      case 'unknown': return;
      case 'boolean': return object.toString();
    }

    if (object === null) return 'null';
    if (object.toJSON) return object.toJSON();
    if (Object.isElement(object)) return;

    var results = [];
    for (var property in object) {
      var value = Object.toJSON(object[property]);
      if (!Object.isUndefined(value))
        results.push(property.toJSON() + ': ' + value);
    }

    return '{' + results.join(', ') + '}';
  },

  toQueryString: function(object) {
    return $H(object).toQueryString();
  },

  toHTML: function(object) {
    return object && object.toHTML ? object.toHTML() : String.interpret(object);
  },

  keys: function(object) {
    var keys = [];
    for (var property in object)
      keys.push(property);
    return keys;
  },

  values: function(object) {
    var values = [];
    for (var property in object)
      values.push(object[property]);
    return values;
  },

  clone: function(object) {
    return Object.extend({ }, object);
  },

  isElement: function(object) {
    return !!(object && object.nodeType == 1);
  },

  isArray: function(object) {
    return object != null && typeof object == "object" &&
      'splice' in object && 'join' in object;
  },

  isHash: function(object) {
    return object instanceof Hash;
  },

  isFunction: function(object) {
    return typeof object == "function";
  },

  isString: function(object) {
    return typeof object == "string";
  },

  isNumber: function(object) {
    return typeof object == "number";
  },

  isUndefined: function(object) {
    return typeof object == "undefined";
  }
});

Object.extend(Function.prototype, {
  argumentNames: function() {
    var names = this.toString().match(/^[\s\(]*function[^(]*\(([^\)]*)\)/)[1]
      .replace(/\s+/g, '').split(',');
    return names.length == 1 && !names[0] ? [] : names;
  },

  bind: function() {
    if (arguments.length < 2 && Object.isUndefined(arguments[0])) return this;
    var __method = this, args = $A(arguments), object = args.shift();
    return function() {
      return __method.apply(object, args.concat($A(arguments)));
    }
  },

  bindAsEventListener: function() {
    var __method = this, args = $A(arguments), object = args.shift();
    return function(event) {
      return __method.apply(object, [event || window.event].concat(args));
    }
  },

  curry: function() {
    if (!arguments.length) return this;
    var __method = this, args = $A(arguments);
    return function() {
      return __method.apply(this, args.concat($A(arguments)));
    }
  },

  delay: function() {
    var __method = this, args = $A(arguments), timeout = args.shift() * 1000;
    return window.setTimeout(function() {
      return __method.apply(__method, args);
    }, timeout);
  },

  defer: function() {
    var args = [0.01].concat($A(arguments));
    return this.delay.apply(this, args);
  },

  wrap: function(wrapper) {
    var __method = this;
    return function() {
      return wrapper.apply(this, [__method.bind(this)].concat($A(arguments)));
    }
  },

  methodize: function() {
    if (this._methodized) return this._methodized;
    var __method = this;
    return this._methodized = function() {
      return __method.apply(null, [this].concat($A(arguments)));
    };
  }
});

Date.prototype.toJSON = function() {
  return '"' + this.getUTCFullYear() + '-' +
    (this.getUTCMonth() + 1).toPaddedString(2) + '-' +
    this.getUTCDate().toPaddedString(2) + 'T' +
    this.getUTCHours().toPaddedString(2) + ':' +
    this.getUTCMinutes().toPaddedString(2) + ':' +
    this.getUTCSeconds().toPaddedString(2) + 'Z"';
};

var Try = {
  these: function() {
    var returnValue;

    for (var i = 0, length = arguments.length; i < length; i++) {
      var lambda = arguments[i];
      try {
        returnValue = lambda();
        break;
      } catch (e) { }
    }

    return returnValue;
  }
};

RegExp.prototype.match = RegExp.prototype.test;

RegExp.escape = function(str) {
  return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
};

/*--------------------------------------------------------------------------*/

var PeriodicalExecuter = Class.create({
  initialize: function(callback, frequency) {
    this.callback = callback;
    this.frequency = frequency;
    this.currentlyExecuting = false;

    this.registerCallback();
  },

  registerCallback: function() {
    this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
  },

  execute: function() {
    this.callback(this);
  },

  stop: function() {
    if (!this.timer) return;
    clearInterval(this.timer);
    this.timer = null;
  },

  onTimerEvent: function() {
    if (!this.currentlyExecuting) {
      try {
        this.currentlyExecuting = true;
        this.execute();
      } finally {
        this.currentlyExecuting = false;
      }
    }
  }
});
Object.extend(String, {
  interpret: function(value) {
    return value == null ? '' : String(value);
  },
  specialChar: {
    '\b': '\\b',
    '\t': '\\t',
    '\n': '\\n',
    '\f': '\\f',
    '\r': '\\r',
    '\\': '\\\\'
  }
});

Object.extend(String.prototype, {
  gsub: function(pattern, replacement) {
    var result = '', source = this, match;
    replacement = arguments.callee.prepareReplacement(replacement);

    while (source.length > 0) {
      if (match = source.match(pattern)) {
        result += source.slice(0, match.index);
        result += String.interpret(replacement(match));
        source  = source.slice(match.index + match[0].length);
      } else {
        result += source, source = '';
      }
    }
    return result;
  },

  sub: function(pattern, replacement, count) {
    replacement = this.gsub.prepareReplacement(replacement);
    count = Object.isUndefined(count) ? 1 : count;

    return this.gsub(pattern, function(match) {
      if (--count < 0) return match[0];
      return replacement(match);
    });
  },

  scan: function(pattern, iterator) {
    this.gsub(pattern, iterator);
    return String(this);
  },

  truncate: function(length, truncation) {
    length = length || 30;
    truncation = Object.isUndefined(truncation) ? '...' : truncation;
    return this.length > length ?
      this.slice(0, length - truncation.length) + truncation : String(this);
  },

  strip: function() {
    return this.replace(/^\s+/, '').replace(/\s+$/, '');
  },

  stripTags: function() {
    return this.replace(/<\/?[^>]+>/gi, '');
  },

  stripScripts: function() {
    return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
  },

  extractScripts: function() {
    var matchAll = new RegExp(Prototype.ScriptFragment, 'img');
    var matchOne = new RegExp(Prototype.ScriptFragment, 'im');
    return (this.match(matchAll) || []).map(function(scriptTag) {
      return (scriptTag.match(matchOne) || ['', ''])[1];
    });
  },

  evalScripts: function() {
    return this.extractScripts().map(function(script) { return eval(script) });
  },

  escapeHTML: function() {
    var self = arguments.callee;
    self.text.data = this;
    return self.div.innerHTML;
  },

  unescapeHTML: function() {
    var div = new Element('div');
    div.innerHTML = this.stripTags();
    return div.childNodes[0] ? (div.childNodes.length > 1 ?
      $A(div.childNodes).inject('', function(memo, node) { return memo+node.nodeValue }) :
      div.childNodes[0].nodeValue) : '';
  },

  toQueryParams: function(separator) {
    var match = this.strip().match(/([^?#]*)(#.*)?$/);
    if (!match) return { };

    return match[1].split(separator || '&').inject({ }, function(hash, pair) {
      if ((pair = pair.split('='))[0]) {
        var key = decodeURIComponent(pair.shift());
        var value = pair.length > 1 ? pair.join('=') : pair[0];
        if (value != undefined) value = decodeURIComponent(value);

        if (key in hash) {
          if (!Object.isArray(hash[key])) hash[key] = [hash[key]];
          hash[key].push(value);
        }
        else hash[key] = value;
      }
      return hash;
    });
  },

  toArray: function() {
    return this.split('');
  },

  succ: function() {
    return this.slice(0, this.length - 1) +
      String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
  },

  times: function(count) {
    return count < 1 ? '' : new Array(count + 1).join(this);
  },

  camelize: function() {
    var parts = this.split('-'), len = parts.length;
    if (len == 1) return parts[0];

    var camelized = this.charAt(0) == '-'
      ? parts[0].charAt(0).toUpperCase() + parts[0].substring(1)
      : parts[0];

    for (var i = 1; i < len; i++)
      camelized += parts[i].charAt(0).toUpperCase() + parts[i].substring(1);

    return camelized;
  },

  capitalize: function() {
    return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
  },

  underscore: function() {
    return this.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z][a-z])/,'#{1}_#{2}').gsub(/([a-z\d])([A-Z])/,'#{1}_#{2}').gsub(/-/,'_').toLowerCase();
  },

  dasherize: function() {
    return this.gsub(/_/,'-');
  },

  inspect: function(useDoubleQuotes) {
    var escapedString = this.gsub(/[\x00-\x1f\\]/, function(match) {
      var character = String.specialChar[match[0]];
      return character ? character : '\\u00' + match[0].charCodeAt().toPaddedString(2, 16);
    });
    if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';
    return "'" + escapedString.replace(/'/g, '\\\'') + "'";
  },

  toJSON: function() {
    return this.inspect(true);
  },

  unfilterJSON: function(filter) {
    return this.sub(filter || Prototype.JSONFilter, '#{1}');
  },

  isJSON: function() {
    var str = this;
    if (str.blank()) return false;
    str = this.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"/g, '');
    return (/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/).test(str);
  },

  evalJSON: function(sanitize) {
    var json = this.unfilterJSON();
    try {
      if (!sanitize || json.isJSON()) return eval('(' + json + ')');
    } catch (e) { }
    throw new SyntaxError('Badly formed JSON string: ' + this.inspect());
  },

  include: function(pattern) {
    return this.indexOf(pattern) > -1;
  },

  startsWith: function(pattern) {
    return this.indexOf(pattern) === 0;
  },

  endsWith: function(pattern) {
    var d = this.length - pattern.length;
    return d >= 0 && this.lastIndexOf(pattern) === d;
  },

  empty: function() {
    return this == '';
  },

  blank: function() {
    return /^\s*$/.test(this);
  },

  interpolate: function(object, pattern) {
    return new Template(this, pattern).evaluate(object);
  }
});

if (Prototype.Browser.WebKit || Prototype.Browser.IE) Object.extend(String.prototype, {
  escapeHTML: function() {
    return this.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
  },
  unescapeHTML: function() {
    return this.stripTags().replace(/&amp;/g,'&').replace(/&lt;/g,'<').replace(/&gt;/g,'>');
  }
});

String.prototype.gsub.prepareReplacement = function(replacement) {
  if (Object.isFunction(replacement)) return replacement;
  var template = new Template(replacement);
  return function(match) { return template.evaluate(match) };
};

String.prototype.parseQuery = String.prototype.toQueryParams;

Object.extend(String.prototype.escapeHTML, {
  div:  document.createElement('div'),
  text: document.createTextNode('')
});

String.prototype.escapeHTML.div.appendChild(String.prototype.escapeHTML.text);

var Template = Class.create({
  initialize: function(template, pattern) {
    this.template = template.toString();
    this.pattern = pattern || Template.Pattern;
  },

  evaluate: function(object) {
    if (Object.isFunction(object.toTemplateReplacements))
      object = object.toTemplateReplacements();

    return this.template.gsub(this.pattern, function(match) {
      if (object == null) return '';

      var before = match[1] || '';
      if (before == '\\') return match[2];

      var ctx = object, expr = match[3];
      var pattern = /^([^.[]+|\[((?:.*?[^\\])?)\])(\.|\[|$)/;
      match = pattern.exec(expr);
      if (match == null) return before;

      while (match != null) {
        var comp = match[1].startsWith('[') ? match[2].gsub('\\\\]', ']') : match[1];
        ctx = ctx[comp];
        if (null == ctx || '' == match[3]) break;
        expr = expr.substring('[' == match[3] ? match[1].length : match[0].length);
        match = pattern.exec(expr);
      }

      return before + String.interpret(ctx);
    });
  }
});
Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;

var $break = { };

var Enumerable = {
  each: function(iterator, context) {
    var index = 0;
    try {
      this._each(function(value) {
        iterator.call(context, value, index++);
      });
    } catch (e) {
      if (e != $break) throw e;
    }
    return this;
  },

  eachSlice: function(number, iterator, context) {
    var index = -number, slices = [], array = this.toArray();
    if (number < 1) return array;
    while ((index += number) < array.length)
      slices.push(array.slice(index, index+number));
    return slices.collect(iterator, context);
  },

  all: function(iterator, context) {
    iterator = iterator || Prototype.K;
    var result = true;
    this.each(function(value, index) {
      result = result && !!iterator.call(context, value, index);
      if (!result) throw $break;
    });
    return result;
  },

  any: function(iterator, context) {
    iterator = iterator || Prototype.K;
    var result = false;
    this.each(function(value, index) {
      if (result = !!iterator.call(context, value, index))
        throw $break;
    });
    return result;
  },

  collect: function(iterator, context) {
    iterator = iterator || Prototype.K;
    var results = [];
    this.each(function(value, index) {
      results.push(iterator.call(context, value, index));
    });
    return results;
  },

  detect: function(iterator, context) {
    var result;
    this.each(function(value, index) {
      if (iterator.call(context, value, index)) {
        result = value;
        throw $break;
      }
    });
    return result;
  },

  findAll: function(iterator, context) {
    var results = [];
    this.each(function(value, index) {
      if (iterator.call(context, value, index))
        results.push(value);
    });
    return results;
  },

  grep: function(filter, iterator, context) {
    iterator = iterator || Prototype.K;
    var results = [];

    if (Object.isString(filter))
      filter = new RegExp(filter);

    this.each(function(value, index) {
      if (filter.match(value))
        results.push(iterator.call(context, value, index));
    });
    return results;
  },

  include: function(object) {
    if (Object.isFunction(this.indexOf))
      if (this.indexOf(object) != -1) return true;

    var found = false;
    this.each(function(value) {
      if (value == object) {
        found = true;
        throw $break;
      }
    });
    return found;
  },

  inGroupsOf: function(number, fillWith) {
    fillWith = Object.isUndefined(fillWith) ? null : fillWith;
    return this.eachSlice(number, function(slice) {
      while(slice.length < number) slice.push(fillWith);
      return slice;
    });
  },

  inject: function(memo, iterator, context) {
    this.each(function(value, index) {
      memo = iterator.call(context, memo, value, index);
    });
    return memo;
  },

  invoke: function(method) {
    var args = $A(arguments).slice(1);
    return this.map(function(value) {
      return value[method].apply(value, args);
    });
  },

  max: function(iterator, context) {
    iterator = iterator || Prototype.K;
    var result;
    this.each(function(value, index) {
      value = iterator.call(context, value, index);
      if (result == null || value >= result)
        result = value;
    });
    return result;
  },

  min: function(iterator, context) {
    iterator = iterator || Prototype.K;
    var result;
    this.each(function(value, index) {
      value = iterator.call(context, value, index);
      if (result == null || value < result)
        result = value;
    });
    return result;
  },

  partition: function(iterator, context) {
    iterator = iterator || Prototype.K;
    var trues = [], falses = [];
    this.each(function(value, index) {
      (iterator.call(context, value, index) ?
        trues : falses).push(value);
    });
    return [trues, falses];
  },

  pluck: function(property) {
    var results = [];
    this.each(function(value) {
      results.push(value[property]);
    });
    return results;
  },

  reject: function(iterator, context) {
    var results = [];
    this.each(function(value, index) {
      if (!iterator.call(context, value, index))
        results.push(value);
    });
    return results;
  },

  sortBy: function(iterator, context) {
    return this.map(function(value, index) {
      return {
        value: value,
        criteria: iterator.call(context, value, index)
      };
    }).sort(function(left, right) {
      var a = left.criteria, b = right.criteria;
      return a < b ? -1 : a > b ? 1 : 0;
    }).pluck('value');
  },

  toArray: function() {
    return this.map();
  },

  zip: function() {
    var iterator = Prototype.K, args = $A(arguments);
    if (Object.isFunction(args.last()))
      iterator = args.pop();

    var collections = [this].concat(args).map($A);
    return this.map(function(value, index) {
      return iterator(collections.pluck(index));
    });
  },

  size: function() {
    return this.toArray().length;
  },

  inspect: function() {
    return '#<Enumerable:' + this.toArray().inspect() + '>';
  }
};

Object.extend(Enumerable, {
  map:     Enumerable.collect,
  find:    Enumerable.detect,
  select:  Enumerable.findAll,
  filter:  Enumerable.findAll,
  member:  Enumerable.include,
  entries: Enumerable.toArray,
  every:   Enumerable.all,
  some:    Enumerable.any
});
function $A(iterable) {
  if (!iterable) return [];
  if (iterable.toArray) return iterable.toArray();
  var length = iterable.length || 0, results = new Array(length);
  while (length--) results[length] = iterable[length];
  return results;
}

if (Prototype.Browser.WebKit) {
  $A = function(iterable) {
    if (!iterable) return [];
    // In Safari, only use the `toArray` method if it's not a NodeList.
    // A NodeList is a function, has an function `item` property, and a numeric
    // `length` property. Adapted from Google Doctype.
    if (!(typeof iterable === 'function' && typeof iterable.length ===
        'number' && typeof iterable.item === 'function') && iterable.toArray)
      return iterable.toArray();
    var length = iterable.length || 0, results = new Array(length);
    while (length--) results[length] = iterable[length];
    return results;
  };
}

Array.from = $A;

Object.extend(Array.prototype, Enumerable);

if (!Array.prototype._reverse) Array.prototype._reverse = Array.prototype.reverse;

Object.extend(Array.prototype, {
  _each: function(iterator) {
    for (var i = 0, length = this.length; i < length; i++)
      iterator(this[i]);
  },

  clear: function() {
    this.length = 0;
    return this;
  },

  first: function() {
    return this[0];
  },

  last: function() {
    return this[this.length - 1];
  },

  compact: function() {
    return this.select(function(value) {
      return value != null;
    });
  },

  flatten: function() {
    return this.inject([], function(array, value) {
      return array.concat(Object.isArray(value) ?
        value.flatten() : [value]);
    });
  },

  without: function() {
    var values = $A(arguments);
    return this.select(function(value) {
      return !values.include(value);
    });
  },

  reverse: function(inline) {
    return (inline !== false ? this : this.toArray())._reverse();
  },

  reduce: function() {
    return this.length > 1 ? this : this[0];
  },

  uniq: function(sorted) {
    return this.inject([], function(array, value, index) {
      if (0 == index || (sorted ? array.last() != value : !array.include(value)))
        array.push(value);
      return array;
    });
  },

  intersect: function(array) {
    return this.uniq().findAll(function(item) {
      return array.detect(function(value) { return item === value });
    });
  },

  clone: function() {
    return [].concat(this);
  },

  size: function() {
    return this.length;
  },

  inspect: function() {
    return '[' + this.map(Object.inspect).join(', ') + ']';
  },

  toJSON: function() {
    var results = [];
    this.each(function(object) {
      var value = Object.toJSON(object);
      if (!Object.isUndefined(value)) results.push(value);
    });
    return '[' + results.join(', ') + ']';
  }
});

// use native browser JS 1.6 implementation if available
if (Object.isFunction(Array.prototype.forEach))
  Array.prototype._each = Array.prototype.forEach;

if (!Array.prototype.indexOf) Array.prototype.indexOf = function(item, i) {
  i || (i = 0);
  var length = this.length;
  if (i < 0) i = length + i;
  for (; i < length; i++)
    if (this[i] === item) return i;
  return -1;
};

if (!Array.prototype.lastIndexOf) Array.prototype.lastIndexOf = function(item, i) {
  i = isNaN(i) ? this.length : (i < 0 ? this.length + i : i) + 1;
  var n = this.slice(0, i).reverse().indexOf(item);
  return (n < 0) ? n : i - n - 1;
};

Array.prototype.toArray = Array.prototype.clone;

function $w(string) {
  if (!Object.isString(string)) return [];
  string = string.strip();
  return string ? string.split(/\s+/) : [];
}

if (Prototype.Browser.Opera){
  Array.prototype.concat = function() {
    var array = [];
    for (var i = 0, length = this.length; i < length; i++) array.push(this[i]);
    for (var i = 0, length = arguments.length; i < length; i++) {
      if (Object.isArray(arguments[i])) {
        for (var j = 0, arrayLength = arguments[i].length; j < arrayLength; j++)
          array.push(arguments[i][j]);
      } else {
        array.push(arguments[i]);
      }
    }
    return array;
  };
}
Object.extend(Number.prototype, {
  toColorPart: function() {
    return this.toPaddedString(2, 16);
  },

  succ: function() {
    return this + 1;
  },

  times: function(iterator, context) {
    $R(0, this, true).each(iterator, context);
    return this;
  },

  toPaddedString: function(length, radix) {
    var string = this.toString(radix || 10);
    return '0'.times(length - string.length) + string;
  },

  toJSON: function() {
    return isFinite(this) ? this.toString() : 'null';
  }
});

$w('abs round ceil floor').each(function(method){
  Number.prototype[method] = Math[method].methodize();
});
function $H(object) {
  return new Hash(object);
};

var Hash = Class.create(Enumerable, (function() {

  function toQueryPair(key, value) {
    if (Object.isUndefined(value)) return key;
    return key + '=' + encodeURIComponent(String.interpret(value));
  }

  return {
    initialize: function(object) {
      this._object = Object.isHash(object) ? object.toObject() : Object.clone(object);
    },

    _each: function(iterator) {
      for (var key in this._object) {
        var value = this._object[key], pair = [key, value];
        pair.key = key;
        pair.value = value;
        iterator(pair);
      }
    },

    set: function(key, value) {
      return this._object[key] = value;
    },

    get: function(key) {
      // simulating poorly supported hasOwnProperty
      if (this._object[key] !== Object.prototype[key])
        return this._object[key];
    },

    unset: function(key) {
      var value = this._object[key];
      delete this._object[key];
      return value;
    },

    toObject: function() {
      return Object.clone(this._object);
    },

    keys: function() {
      return this.pluck('key');
    },

    values: function() {
      return this.pluck('value');
    },

    index: function(value) {
      var match = this.detect(function(pair) {
        return pair.value === value;
      });
      return match && match.key;
    },

    merge: function(object) {
      return this.clone().update(object);
    },

    update: function(object) {
      return new Hash(object).inject(this, function(result, pair) {
        result.set(pair.key, pair.value);
        return result;
      });
    },

    toQueryString: function() {
      return this.inject([], function(results, pair) {
        var key = encodeURIComponent(pair.key), values = pair.value;

        if (values && typeof values == 'object') {
          if (Object.isArray(values))
            return results.concat(values.map(toQueryPair.curry(key)));
        } else results.push(toQueryPair(key, values));
        return results;
      }).join('&');
    },

    inspect: function() {
      return '#<Hash:{' + this.map(function(pair) {
        return pair.map(Object.inspect).join(': ');
      }).join(', ') + '}>';
    },

    toJSON: function() {
      return Object.toJSON(this.toObject());
    },

    clone: function() {
      return new Hash(this);
    }
  }
})());

Hash.prototype.toTemplateReplacements = Hash.prototype.toObject;
Hash.from = $H;
var ObjectRange = Class.create(Enumerable, {
  initialize: function(start, end, exclusive) {
    this.start = start;
    this.end = end;
    this.exclusive = exclusive;
  },

  _each: function(iterator) {
    var value = this.start;
    while (this.include(value)) {
      iterator(value);
      value = value.succ();
    }
  },

  include: function(value) {
    if (value < this.start)
      return false;
    if (this.exclusive)
      return value < this.end;
    return value <= this.end;
  }
});

var $R = function(start, end, exclusive) {
  return new ObjectRange(start, end, exclusive);
};

var Ajax = {
  getTransport: function() {
    return Try.these(
      function() {return new XMLHttpRequest()},
      function() {return new ActiveXObject('Msxml2.XMLHTTP')},
      function() {return new ActiveXObject('Microsoft.XMLHTTP')}
    ) || false;
  },

  activeRequestCount: 0
};

Ajax.Responders = {
  responders: [],

  _each: function(iterator) {
    this.responders._each(iterator);
  },

  register: function(responder) {
    if (!this.include(responder))
      this.responders.push(responder);
  },

  unregister: function(responder) {
    this.responders = this.responders.without(responder);
  },

  dispatch: function(callback, request, transport, json) {
    this.each(function(responder) {
      if (Object.isFunction(responder[callback])) {
        try {
          responder[callback].apply(responder, [request, transport, json]);
        } catch (e) { }
      }
    });
  }
};

Object.extend(Ajax.Responders, Enumerable);

Ajax.Responders.register({
  onCreate:   function() { Ajax.activeRequestCount++ },
  onComplete: function() { Ajax.activeRequestCount-- }
});

Ajax.Base = Class.create({
  initialize: function(options) {
    this.options = {
      method:       'post',
      asynchronous: true,
      contentType:  'application/x-www-form-urlencoded',
      encoding:     'UTF-8',
      parameters:   '',
      evalJSON:     true,
      evalJS:       true
    };
    Object.extend(this.options, options || { });

    this.options.method = this.options.method.toLowerCase();

    if (Object.isString(this.options.parameters))
      this.options.parameters = this.options.parameters.toQueryParams();
    else if (Object.isHash(this.options.parameters))
      this.options.parameters = this.options.parameters.toObject();
  }
});

Ajax.Request = Class.create(Ajax.Base, {
  _complete: false,

  initialize: function($super, url, options) {
    $super(options);
    this.transport = Ajax.getTransport();
    this.request(url);
  },

  request: function(url) {
    this.url = url;
    this.method = this.options.method;
    var params = Object.clone(this.options.parameters);

    if (!['get', 'post'].include(this.method)) {
      // simulate other verbs over post
      params['_method'] = this.method;
      this.method = 'post';
    }

    this.parameters = params;

    if (params = Object.toQueryString(params)) {
      // when GET, append parameters to URL
      if (this.method == 'get')
        this.url += (this.url.include('?') ? '&' : '?') + params;
      else if (/Konqueror|Safari|KHTML/.test(navigator.userAgent))
        params += '&_=';
    }

    try {
      var response = new Ajax.Response(this);
      if (this.options.onCreate) this.options.onCreate(response);
      Ajax.Responders.dispatch('onCreate', this, response);

      this.transport.open(this.method.toUpperCase(), this.url,
        this.options.asynchronous);

      if (this.options.asynchronous) this.respondToReadyState.bind(this).defer(1);

      this.transport.onreadystatechange = this.onStateChange.bind(this);
      this.setRequestHeaders();

      this.body = this.method == 'post' ? (this.options.postBody || params) : null;
      this.transport.send(this.body);

      /* Force Firefox to handle ready state 4 for synchronous requests */
      if (!this.options.asynchronous && this.transport.overrideMimeType)
        this.onStateChange();

    }
    catch (e) {
      this.dispatchException(e);
    }
  },

  onStateChange: function() {
    var readyState = this.transport.readyState;
    if (readyState > 1 && !((readyState == 4) && this._complete))
      this.respondToReadyState(this.transport.readyState);
  },

  setRequestHeaders: function() {
    var headers = {
      'X-Requested-With': 'XMLHttpRequest',
      'X-Prototype-Version': Prototype.Version,
      'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
    };

    if (this.method == 'post') {
      headers['Content-type'] = this.options.contentType +
        (this.options.encoding ? '; charset=' + this.options.encoding : '');

      /* Force "Connection: close" for older Mozilla browsers to work
       * around a bug where XMLHttpRequest sends an incorrect
       * Content-length header. See Mozilla Bugzilla #246651.
       */
      if (this.transport.overrideMimeType &&
          (navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
            headers['Connection'] = 'close';
    }

    // user-defined headers
    if (typeof this.options.requestHeaders == 'object') {
      var extras = this.options.requestHeaders;

      if (Object.isFunction(extras.push))
        for (var i = 0, length = extras.length; i < length; i += 2)
          headers[extras[i]] = extras[i+1];
      else
        $H(extras).each(function(pair) { headers[pair.key] = pair.value });
    }

    for (var name in headers)
      this.transport.setRequestHeader(name, headers[name]);
  },

  success: function() {
    var status = this.getStatus();
    return !status || (status >= 200 && status < 300);
  },

  getStatus: function() {
    try {
      return this.transport.status || 0;
    } catch (e) { return 0 }
  },

  respondToReadyState: function(readyState) {
    var state = Ajax.Request.Events[readyState], response = new Ajax.Response(this);

    if (state == 'Complete') {
      try {
        this._complete = true;
        (this.options['on' + response.status]
         || this.options['on' + (this.success() ? 'Success' : 'Failure')]
         || Prototype.emptyFunction)(response, response.headerJSON);
      } catch (e) {
        this.dispatchException(e);
      }

      var contentType = response.getHeader('Content-type');
      if (this.options.evalJS == 'force'
          || (this.options.evalJS && this.isSameOrigin() && contentType
          && contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))
        this.evalResponse();
    }

    try {
      (this.options['on' + state] || Prototype.emptyFunction)(response, response.headerJSON);
      Ajax.Responders.dispatch('on' + state, this, response, response.headerJSON);
    } catch (e) {
      this.dispatchException(e);
    }

    if (state == 'Complete') {
      // avoid memory leak in MSIE: clean up
      this.transport.onreadystatechange = Prototype.emptyFunction;
    }
  },

  isSameOrigin: function() {
    var m = this.url.match(/^\s*https?:\/\/[^\/]*/);
    return !m || (m[0] == '#{protocol}//#{domain}#{port}'.interpolate({
      protocol: location.protocol,
      domain: document.domain,
      port: location.port ? ':' + location.port : ''
    }));
  },

  getHeader: function(name) {
    try {
      return this.transport.getResponseHeader(name) || null;
    } catch (e) { return null }
  },

  evalResponse: function() {
    try {
      return eval((this.transport.responseText || '').unfilterJSON());
    } catch (e) {
      this.dispatchException(e);
    }
  },

  dispatchException: function(exception) {
    (this.options.onException || Prototype.emptyFunction)(this, exception);
    Ajax.Responders.dispatch('onException', this, exception);
  }
});

Ajax.Request.Events =
  ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];

Ajax.Response = Class.create({
  initialize: function(request){
    this.request = request;
    var transport  = this.transport  = request.transport,
        readyState = this.readyState = transport.readyState;

    if((readyState > 2 && !Prototype.Browser.IE) || readyState == 4) {
      this.status       = this.getStatus();
      this.statusText   = this.getStatusText();
      this.responseText = String.interpret(transport.responseText);
      this.headerJSON   = this._getHeaderJSON();
    }

    if(readyState == 4) {
      var xml = transport.responseXML;
      this.responseXML  = Object.isUndefined(xml) ? null : xml;
      this.responseJSON = this._getResponseJSON();
    }
  },

  status:      0,
  statusText: '',

  getStatus: Ajax.Request.prototype.getStatus,

  getStatusText: function() {
    try {
      return this.transport.statusText || '';
    } catch (e) { return '' }
  },

  getHeader: Ajax.Request.prototype.getHeader,

  getAllHeaders: function() {
    try {
      return this.getAllResponseHeaders();
    } catch (e) { return null }
  },

  getResponseHeader: function(name) {
    return this.transport.getResponseHeader(name);
  },

  getAllResponseHeaders: function() {
    return this.transport.getAllResponseHeaders();
  },

  _getHeaderJSON: function() {
    var json = this.getHeader('X-JSON');
    if (!json) return null;
    json = decodeURIComponent(escape(json));
    try {
      return json.evalJSON(this.request.options.sanitizeJSON ||
        !this.request.isSameOrigin());
    } catch (e) {
      this.request.dispatchException(e);
    }
  },

  _getResponseJSON: function() {
    var options = this.request.options;
    if (!options.evalJSON || (options.evalJSON != 'force' &&
      !(this.getHeader('Content-type') || '').include('application/json')) ||
        this.responseText.blank())
          return null;
    try {
      return this.responseText.evalJSON(options.sanitizeJSON ||
        !this.request.isSameOrigin());
    } catch (e) {
      this.request.dispatchException(e);
    }
  }
});

Ajax.Updater = Class.create(Ajax.Request, {
  initialize: function($super, container, url, options) {
    this.container = {
      success: (container.success || container),
      failure: (container.failure || (container.success ? null : container))
    };

    options = Object.clone(options);
    var onComplete = options.onComplete;
    options.onComplete = (function(response, json) {
      this.updateContent(response.responseText);
      if (Object.isFunction(onComplete)) onComplete(response, json);
    }).bind(this);

    $super(url, options);
  },

  updateContent: function(responseText) {
    var receiver = this.container[this.success() ? 'success' : 'failure'],
        options = this.options;

    if (!options.evalScripts) responseText = responseText.stripScripts();

    if (receiver = $(receiver)) {
      if (options.insertion) {
        if (Object.isString(options.insertion)) {
          var insertion = { }; insertion[options.insertion] = responseText;
          receiver.insert(insertion);
        }
        else options.insertion(receiver, responseText);
      }
      else receiver.update(responseText);
    }
  }
});

Ajax.PeriodicalUpdater = Class.create(Ajax.Base, {
  initialize: function($super, container, url, options) {
    $super(options);
    this.onComplete = this.options.onComplete;

    this.frequency = (this.options.frequency || 2);
    this.decay = (this.options.decay || 1);

    this.updater = { };
    this.container = container;
    this.url = url;

    this.start();
  },

  start: function() {
    this.options.onComplete = this.updateComplete.bind(this);
    this.onTimerEvent();
  },

  stop: function() {
    this.updater.options.onComplete = undefined;
    clearTimeout(this.timer);
    (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
  },

  updateComplete: function(response) {
    if (this.options.decay) {
      this.decay = (response.responseText == this.lastText ?
        this.decay * this.options.decay : 1);

      this.lastText = response.responseText;
    }
    this.timer = this.onTimerEvent.bind(this).delay(this.decay * this.frequency);
  },

  onTimerEvent: function() {
    this.updater = new Ajax.Updater(this.container, this.url, this.options);
  }
});
function $(element) {
  if (arguments.length > 1) {
    for (var i = 0, elements = [], length = arguments.length; i < length; i++)
      elements.push($(arguments[i]));
    return elements;
  }
  if (Object.isString(element))
    element = document.getElementById(element);
  return Element.extend(element);
}

if (Prototype.BrowserFeatures.XPath) {
  document._getElementsByXPath = function(expression, parentElement) {
    var results = [];
    var query = document.evaluate(expression, $(parentElement) || document,
      null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);
    for (var i = 0, length = query.snapshotLength; i < length; i++)
      results.push(Element.extend(query.snapshotItem(i)));
    return results;
  };
}

/*--------------------------------------------------------------------------*/

if (!window.Node) var Node = { };

if (!Node.ELEMENT_NODE) {
  // DOM level 2 ECMAScript Language Binding
  Object.extend(Node, {
    ELEMENT_NODE: 1,
    ATTRIBUTE_NODE: 2,
    TEXT_NODE: 3,
    CDATA_SECTION_NODE: 4,
    ENTITY_REFERENCE_NODE: 5,
    ENTITY_NODE: 6,
    PROCESSING_INSTRUCTION_NODE: 7,
    COMMENT_NODE: 8,
    DOCUMENT_NODE: 9,
    DOCUMENT_TYPE_NODE: 10,
    DOCUMENT_FRAGMENT_NODE: 11,
    NOTATION_NODE: 12
  });
}

(function() {
  var element = this.Element;
  this.Element = function(tagName, attributes) {
    attributes = attributes || { };
    tagName = tagName.toLowerCase();
    var cache = Element.cache;
    if (Prototype.Browser.IE && attributes.name) {
      tagName = '<' + tagName + ' name="' + attributes.name + '">';
      delete attributes.name;
      return Element.writeAttribute(document.createElement(tagName), attributes);
    }
    if (!cache[tagName]) cache[tagName] = Element.extend(document.createElement(tagName));
    return Element.writeAttribute(cache[tagName].cloneNode(false), attributes);
  };
  Object.extend(this.Element, element || { });
  if (element) this.Element.prototype = element.prototype;
}).call(window);

Element.cache = { };

Element.Methods = {
  visible: function(element) {
    return $(element).style.display != 'none';
  },

  toggle: function(element) {
    element = $(element);
    Element[Element.visible(element) ? 'hide' : 'show'](element);
    return element;
  },

  hide: function(element) {
    element = $(element);
    element.style.display = 'none';
    return element;
  },

  show: function(element) {
    element = $(element);
    element.style.display = '';
    return element;
  },

  remove: function(element) {
    element = $(element);
    element.parentNode.removeChild(element);
    return element;
  },

  update: function(element, content) {
    element = $(element);
    if (content && content.toElement) content = content.toElement();
    if (Object.isElement(content)) return element.update().insert(content);
    content = Object.toHTML(content);
    element.innerHTML = content.stripScripts();
    content.evalScripts.bind(content).defer();
    return element;
  },

  replace: function(element, content) {
    element = $(element);
    if (content && content.toElement) content = content.toElement();
    else if (!Object.isElement(content)) {
      content = Object.toHTML(content);
      var range = element.ownerDocument.createRange();
      range.selectNode(element);
      content.evalScripts.bind(content).defer();
      content = range.createContextualFragment(content.stripScripts());
    }
    element.parentNode.replaceChild(content, element);
    return element;
  },

  insert: function(element, insertions) {
    element = $(element);

    if (Object.isString(insertions) || Object.isNumber(insertions) ||
        Object.isElement(insertions) || (insertions && (insertions.toElement || insertions.toHTML)))
          insertions = {bottom:insertions};

    var content, insert, tagName, childNodes;

    for (var position in insertions) {
      content  = insertions[position];
      position = position.toLowerCase();
      insert = Element._insertionTranslations[position];

      if (content && content.toElement) content = content.toElement();
      if (Object.isElement(content)) {
        insert(element, content);
        continue;
      }

      content = Object.toHTML(content);

      tagName = ((position == 'before' || position == 'after')
        ? element.parentNode : element).tagName.toUpperCase();

      childNodes = Element._getContentFromAnonymousElement(tagName, content.stripScripts());

      if (position == 'top' || position == 'after') childNodes.reverse();
      childNodes.each(insert.curry(element));

      content.evalScripts.bind(content).defer();
    }

    return element;
  },

  wrap: function(element, wrapper, attributes) {
    element = $(element);
    if (Object.isElement(wrapper))
      $(wrapper).writeAttribute(attributes || { });
    else if (Object.isString(wrapper)) wrapper = new Element(wrapper, attributes);
    else wrapper = new Element('div', wrapper);
    if (element.parentNode)
      element.parentNode.replaceChild(wrapper, element);
    wrapper.appendChild(element);
    return wrapper;
  },

  inspect: function(element) {
    element = $(element);
    var result = '<' + element.tagName.toLowerCase();
    $H({'id': 'id', 'className': 'class'}).each(function(pair) {
      var property = pair.first(), attribute = pair.last();
      var value = (element[property] || '').toString();
      if (value) result += ' ' + attribute + '=' + value.inspect(true);
    });
    return result + '>';
  },

  recursivelyCollect: function(element, property) {
    element = $(element);
    var elements = [];
    while (element = element[property])
      if (element.nodeType == 1)
        elements.push(Element.extend(element));
    return elements;
  },

  ancestors: function(element) {
    return $(element).recursivelyCollect('parentNode');
  },

  descendants: function(element) {
    return $(element).select("*");
  },

  firstDescendant: function(element) {
    element = $(element).firstChild;
    while (element && element.nodeType != 1) element = element.nextSibling;
    return $(element);
  },

  immediateDescendants: function(element) {
    if (!(element = $(element).firstChild)) return [];
    while (element && element.nodeType != 1) element = element.nextSibling;
    if (element) return [element].concat($(element).nextSiblings());
    return [];
  },

  previousSiblings: function(element) {
    return $(element).recursivelyCollect('previousSibling');
  },

  nextSiblings: function(element) {
    return $(element).recursivelyCollect('nextSibling');
  },

  siblings: function(element) {
    element = $(element);
    return element.previousSiblings().reverse().concat(element.nextSiblings());
  },

  match: function(element, selector) {
    if (Object.isString(selector))
      selector = new Selector(selector);
    return selector.match($(element));
  },

  up: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return $(element.parentNode);
    var ancestors = element.ancestors();
    return Object.isNumber(expression) ? ancestors[expression] :
      Selector.findElement(ancestors, expression, index);
  },

  down: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return element.firstDescendant();
    return Object.isNumber(expression) ? element.descendants()[expression] :
      Element.select(element, expression)[index || 0];
  },

  previous: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return $(Selector.handlers.previousElementSibling(element));
    var previousSiblings = element.previousSiblings();
    return Object.isNumber(expression) ? previousSiblings[expression] :
      Selector.findElement(previousSiblings, expression, index);
  },

  next: function(element, expression, index) {
    element = $(element);
    if (arguments.length == 1) return $(Selector.handlers.nextElementSibling(element));
    var nextSiblings = element.nextSiblings();
    return Object.isNumber(expression) ? nextSiblings[expression] :
      Selector.findElement(nextSiblings, expression, index);
  },

  select: function() {
    var args = $A(arguments), element = $(args.shift());
    return Selector.findChildElements(element, args);
  },

  adjacent: function() {
    var args = $A(arguments), element = $(args.shift());
    return Selector.findChildElements(element.parentNode, args).without(element);
  },

  identify: function(element) {
    element = $(element);
    var id = element.readAttribute('id'), self = arguments.callee;
    if (id) return id;
    do { id = 'anonymous_element_' + self.counter++ } while ($(id));
    element.writeAttribute('id', id);
    return id;
  },

  readAttribute: function(element, name) {
    element = $(element);
    if (Prototype.Browser.IE) {
      var t = Element._attributeTranslations.read;
      if (t.values[name]) return t.values[name](element, name);
      if (t.names[name]) name = t.names[name];
      if (name.include(':')) {
        return (!element.attributes || !element.attributes[name]) ? null :
         element.attributes[name].value;
      }
    }
    return element.getAttribute(name);
  },

  writeAttribute: function(element, name, value) {
    element = $(element);
    var attributes = { }, t = Element._attributeTranslations.write;

    if (typeof name == 'object') attributes = name;
    else attributes[name] = Object.isUndefined(value) ? true : value;

    for (var attr in attributes) {
      name = t.names[attr] || attr;
      value = attributes[attr];
      if (t.values[attr]) name = t.values[attr](element, value);
      if (value === false || value === null)
        element.removeAttribute(name);
      else if (value === true)
        element.setAttribute(name, name);
      else element.setAttribute(name, value);
    }
    return element;
  },

  getHeight: function(element) {
    return $(element).getDimensions().height;
  },

  getWidth: function(element) {
    return $(element).getDimensions().width;
  },

  classNames: function(element) {
    return new Element.ClassNames(element);
  },

  hasClassName: function(element, className) {
    if (!(element = $(element))) return;
    var elementClassName = element.className;
    return (elementClassName.length > 0 && (elementClassName == className ||
      new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)));
  },

  addClassName: function(element, className) {
    if (!(element = $(element))) return;
    if (!element.hasClassName(className))
      element.className += (element.className ? ' ' : '') + className;
    return element;
  },

  removeClassName: function(element, className) {
    if (!(element = $(element))) return;
    element.className = element.className.replace(
      new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ').strip();
    return element;
  },

  toggleClassName: function(element, className) {
    if (!(element = $(element))) return;
    return element[element.hasClassName(className) ?
      'removeClassName' : 'addClassName'](className);
  },

  // removes whitespace-only text node children
  cleanWhitespace: function(element) {
    element = $(element);
    var node = element.firstChild;
    while (node) {
      var nextNode = node.nextSibling;
      if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
        element.removeChild(node);
      node = nextNode;
    }
    return element;
  },

  empty: function(element) {
    return $(element).innerHTML.blank();
  },

  descendantOf: function(element, ancestor) {
    element = $(element), ancestor = $(ancestor);

    if (element.compareDocumentPosition)
      return (element.compareDocumentPosition(ancestor) & 8) === 8;

    if (ancestor.contains)
      return ancestor.contains(element) && ancestor !== element;

    while (element = element.parentNode)
      if (element == ancestor) return true;

    return false;
  },

  scrollTo: function(element) {
    element = $(element);
    var pos = element.cumulativeOffset();
    window.scrollTo(pos[0], pos[1]);
    return element;
  },

  getStyle: function(element, style) {
    element = $(element);
    style = style == 'float' ? 'cssFloat' : style.camelize();
    var value = element.style[style];
    if (!value || value == 'auto') {
      var css = document.defaultView.getComputedStyle(element, null);
      value = css ? css[style] : null;
    }
    if (style == 'opacity') return value ? parseFloat(value) : 1.0;
    return value == 'auto' ? null : value;
  },

  getOpacity: function(element) {
    return $(element).getStyle('opacity');
  },

  setStyle: function(element, styles) {
    element = $(element);
    var elementStyle = element.style, match;
    if (Object.isString(styles)) {
      element.style.cssText += ';' + styles;
      return styles.include('opacity') ?
        element.setOpacity(styles.match(/opacity:\s*(\d?\.?\d*)/)[1]) : element;
    }
    for (var property in styles)
      if (property == 'opacity') element.setOpacity(styles[property]);
      else
        elementStyle[(property == 'float' || property == 'cssFloat') ?
          (Object.isUndefined(elementStyle.styleFloat) ? 'cssFloat' : 'styleFloat') :
            property] = styles[property];

    return element;
  },

  setOpacity: function(element, value) {
    element = $(element);
    element.style.opacity = (value == 1 || value === '') ? '' :
      (value < 0.00001) ? 0 : value;
    return element;
  },

  getDimensions: function(element) {
    element = $(element);
    var display = element.getStyle('display');
    if (display != 'none' && display != null) // Safari bug
      return {width: element.offsetWidth, height: element.offsetHeight};

    // All *Width and *Height properties give 0 on elements with display none,
    // so enable the element temporarily
    var els = element.style;
    var originalVisibility = els.visibility;
    var originalPosition = els.position;
    var originalDisplay = els.display;
    els.visibility = 'hidden';
    els.position = 'absolute';
    els.display = 'block';
    var originalWidth = element.clientWidth;
    var originalHeight = element.clientHeight;
    els.display = originalDisplay;
    els.position = originalPosition;
    els.visibility = originalVisibility;
    return {width: originalWidth, height: originalHeight};
  },

  makePositioned: function(element) {
    element = $(element);
    var pos = Element.getStyle(element, 'position');
    if (pos == 'static' || !pos) {
      element._madePositioned = true;
      element.style.position = 'relative';
      // Opera returns the offset relative to the positioning context, when an
      // element is position relative but top and left have not been defined
      if (Prototype.Browser.Opera) {
        element.style.top = 0;
        element.style.left = 0;
      }
    }
    return element;
  },

  undoPositioned: function(element) {
    element = $(element);
    if (element._madePositioned) {
      element._madePositioned = undefined;
      element.style.position =
        element.style.top =
        element.style.left =
        element.style.bottom =
        element.style.right = '';
    }
    return element;
  },

  makeClipping: function(element) {
    element = $(element);
    if (element._overflow) return element;
    element._overflow = Element.getStyle(element, 'overflow') || 'auto';
    if (element._overflow !== 'hidden')
      element.style.overflow = 'hidden';
    return element;
  },

  undoClipping: function(element) {
    element = $(element);
    if (!element._overflow) return element;
    element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;
    element._overflow = null;
    return element;
  },

  cumulativeOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      element = element.offsetParent;
    } while (element);
    return Element._returnOffset(valueL, valueT);
  },

  positionedOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      element = element.offsetParent;
      if (element) {
        if (element.tagName.toUpperCase() == 'BODY') break;
        var p = Element.getStyle(element, 'position');
        if (p !== 'static') break;
      }
    } while (element);
    return Element._returnOffset(valueL, valueT);
  },

  absolutize: function(element) {
    element = $(element);
    if (element.getStyle('position') == 'absolute') return element;
    // Position.prepare(); // To be done manually by Scripty when it needs it.

    var offsets = element.positionedOffset();
    var top     = offsets[1];
    var left    = offsets[0];
    var width   = element.clientWidth;
    var height  = element.clientHeight;

    element._originalLeft   = left - parseFloat(element.style.left  || 0);
    element._originalTop    = top  - parseFloat(element.style.top || 0);
    element._originalWidth  = element.style.width;
    element._originalHeight = element.style.height;

    element.style.position = 'absolute';
    element.style.top    = top + 'px';
    element.style.left   = left + 'px';
    element.style.width  = width + 'px';
    element.style.height = height + 'px';
    return element;
  },

  relativize: function(element) {
    element = $(element);
    if (element.getStyle('position') == 'relative') return element;
    // Position.prepare(); // To be done manually by Scripty when it needs it.

    element.style.position = 'relative';
    var top  = parseFloat(element.style.top  || 0) - (element._originalTop || 0);
    var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);

    element.style.top    = top + 'px';
    element.style.left   = left + 'px';
    element.style.height = element._originalHeight;
    element.style.width  = element._originalWidth;
    return element;
  },

  cumulativeScrollOffset: function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.scrollTop  || 0;
      valueL += element.scrollLeft || 0;
      element = element.parentNode;
    } while (element);
    return Element._returnOffset(valueL, valueT);
  },

  getOffsetParent: function(element) {
    if (element.offsetParent) return $(element.offsetParent);
    if (element == document.body) return $(element);

    while ((element = element.parentNode) && element != document.body)
      if (Element.getStyle(element, 'position') != 'static')
        return $(element);

    return $(document.body);
  },

  viewportOffset: function(forElement) {
    var valueT = 0, valueL = 0;

    var element = forElement;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;

      // Safari fix
      if (element.offsetParent == document.body &&
        Element.getStyle(element, 'position') == 'absolute') break;

    } while (element = element.offsetParent);

    element = forElement;
    do {
      if (!Prototype.Browser.Opera || (element.tagName && (element.tagName.toUpperCase() == 'BODY'))) {
        valueT -= element.scrollTop  || 0;
        valueL -= element.scrollLeft || 0;
      }
    } while (element = element.parentNode);

    return Element._returnOffset(valueL, valueT);
  },

  clonePosition: function(element, source) {
    var options = Object.extend({
      setLeft:    true,
      setTop:     true,
      setWidth:   true,
      setHeight:  true,
      offsetTop:  0,
      offsetLeft: 0
    }, arguments[2] || { });

    // find page position of source
    source = $(source);
    var p = source.viewportOffset();

    // find coordinate system to use
    element = $(element);
    var delta = [0, 0];
    var parent = null;
    // delta [0,0] will do fine with position: fixed elements,
    // position:absolute needs offsetParent deltas
    if (Element.getStyle(element, 'position') == 'absolute') {
      parent = element.getOffsetParent();
      delta = parent.viewportOffset();
    }

    // correct by body offsets (fixes Safari)
    if (parent == document.body) {
      delta[0] -= document.body.offsetLeft;
      delta[1] -= document.body.offsetTop;
    }

    // set position
    if (options.setLeft)   element.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';
    if (options.setTop)    element.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';
    if (options.setWidth)  element.style.width = source.offsetWidth + 'px';
    if (options.setHeight) element.style.height = source.offsetHeight + 'px';
    return element;
  }
};

Element.Methods.identify.counter = 1;

Object.extend(Element.Methods, {
  getElementsBySelector: Element.Methods.select,
  childElements: Element.Methods.immediateDescendants
});

Element._attributeTranslations = {
  write: {
    names: {
      className: 'class',
      htmlFor:   'for'
    },
    values: { }
  }
};

if (Prototype.Browser.Opera) {
  Element.Methods.getStyle = Element.Methods.getStyle.wrap(
    function(proceed, element, style) {
      switch (style) {
        case 'left': case 'top': case 'right': case 'bottom':
          if (proceed(element, 'position') === 'static') return null;
        case 'height': case 'width':
          // returns '0px' for hidden elements; we want it to return null
          if (!Element.visible(element)) return null;

          // returns the border-box dimensions rather than the content-box
          // dimensions, so we subtract padding and borders from the value
          var dim = parseInt(proceed(element, style), 10);

          if (dim !== element['offset' + style.capitalize()])
            return dim + 'px';

          var properties;
          if (style === 'height') {
            properties = ['border-top-width', 'padding-top',
             'padding-bottom', 'border-bottom-width'];
          }
          else {
            properties = ['border-left-width', 'padding-left',
             'padding-right', 'border-right-width'];
          }
          return properties.inject(dim, function(memo, property) {
            var val = proceed(element, property);
            return val === null ? memo : memo - parseInt(val, 10);
          }) + 'px';
        default: return proceed(element, style);
      }
    }
  );

  Element.Methods.readAttribute = Element.Methods.readAttribute.wrap(
    function(proceed, element, attribute) {
      if (attribute === 'title') return element.title;
      return proceed(element, attribute);
    }
  );
}

else if (Prototype.Browser.IE) {
  // IE doesn't report offsets correctly for static elements, so we change them
  // to "relative" to get the values, then change them back.
  Element.Methods.getOffsetParent = Element.Methods.getOffsetParent.wrap(
    function(proceed, element) {
      element = $(element);
      // IE throws an error if element is not in document
      try { element.offsetParent }
      catch(e) { return $(document.body) }
      var position = element.getStyle('position');
      if (position !== 'static') return proceed(element);
      element.setStyle({ position: 'relative' });
      var value = proceed(element);
      element.setStyle({ position: position });
      return value;
    }
  );

  $w('positionedOffset viewportOffset').each(function(method) {
    Element.Methods[method] = Element.Methods[method].wrap(
      function(proceed, element) {
        element = $(element);
        try { element.offsetParent }
        catch(e) { return Element._returnOffset(0,0) }
        var position = element.getStyle('position');
        if (position !== 'static') return proceed(element);
        // Trigger hasLayout on the offset parent so that IE6 reports
        // accurate offsetTop and offsetLeft values for position: fixed.
        var offsetParent = element.getOffsetParent();
        if (offsetParent && offsetParent.getStyle('position') === 'fixed')
          offsetParent.setStyle({ zoom: 1 });
        element.setStyle({ position: 'relative' });
        var value = proceed(element);
        element.setStyle({ position: position });
        return value;
      }
    );
  });

  Element.Methods.cumulativeOffset = Element.Methods.cumulativeOffset.wrap(
    function(proceed, element) {
      try { element.offsetParent }
      catch(e) { return Element._returnOffset(0,0) }
      return proceed(element);
    }
  );

  Element.Methods.getStyle = function(element, style) {
    element = $(element);
    style = (style == 'float' || style == 'cssFloat') ? 'styleFloat' : style.camelize();
    var value = element.style[style];
    if (!value && element.currentStyle) value = element.currentStyle[style];

    if (style == 'opacity') {
      if (value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))
        if (value[1]) return parseFloat(value[1]) / 100;
      return 1.0;
    }

    if (value == 'auto') {
      if ((style == 'width' || style == 'height') && (element.getStyle('display') != 'none'))
        return element['offset' + style.capitalize()] + 'px';
      return null;
    }
    return value;
  };

  Element.Methods.setOpacity = function(element, value) {
    function stripAlpha(filter){
      return filter.replace(/alpha\([^\)]*\)/gi,'');
    }
    element = $(element);
    var currentStyle = element.currentStyle;
    if ((currentStyle && !currentStyle.hasLayout) ||
      (!currentStyle && element.style.zoom == 'normal'))
        element.style.zoom = 1;

    var filter = element.getStyle('filter'), style = element.style;
    if (value == 1 || value === '') {
      (filter = stripAlpha(filter)) ?
        style.filter = filter : style.removeAttribute('filter');
      return element;
    } else if (value < 0.00001) value = 0;
    style.filter = stripAlpha(filter) +
      'alpha(opacity=' + (value * 100) + ')';
    return element;
  };

  Element._attributeTranslations = {
    read: {
      names: {
        'class': 'className',
        'for':   'htmlFor'
      },
      values: {
        _getAttr: function(element, attribute) {
          return element.getAttribute(attribute, 2);
        },
        _getAttrNode: function(element, attribute) {
          var node = element.getAttributeNode(attribute);
          return node ? node.value : "";
        },
        _getEv: function(element, attribute) {
          attribute = element.getAttribute(attribute);
          return attribute ? attribute.toString().slice(23, -2) : null;
        },
        _flag: function(element, attribute) {
          return $(element).hasAttribute(attribute) ? attribute : null;
        },
        style: function(element) {
          return element.style.cssText.toLowerCase();
        },
        title: function(element) {
          return element.title;
        }
      }
    }
  };

  Element._attributeTranslations.write = {
    names: Object.extend({
      cellpadding: 'cellPadding',
      cellspacing: 'cellSpacing'
    }, Element._attributeTranslations.read.names),
    values: {
      checked: function(element, value) {
        element.checked = !!value;
      },

      style: function(element, value) {
        element.style.cssText = value ? value : '';
      }
    }
  };

  Element._attributeTranslations.has = {};

  $w('colSpan rowSpan vAlign dateTime accessKey tabIndex ' +
      'encType maxLength readOnly longDesc frameBorder').each(function(attr) {
    Element._attributeTranslations.write.names[attr.toLowerCase()] = attr;
    Element._attributeTranslations.has[attr.toLowerCase()] = attr;
  });

  (function(v) {
    Object.extend(v, {
      href:        v._getAttr,
      src:         v._getAttr,
      type:        v._getAttr,
      action:      v._getAttrNode,
      disabled:    v._flag,
      checked:     v._flag,
      readonly:    v._flag,
      multiple:    v._flag,
      onload:      v._getEv,
      onunload:    v._getEv,
      onclick:     v._getEv,
      ondblclick:  v._getEv,
      onmousedown: v._getEv,
      onmouseup:   v._getEv,
      onmouseover: v._getEv,
      onmousemove: v._getEv,
      onmouseout:  v._getEv,
      onfocus:     v._getEv,
      onblur:      v._getEv,
      onkeypress:  v._getEv,
      onkeydown:   v._getEv,
      onkeyup:     v._getEv,
      onsubmit:    v._getEv,
      onreset:     v._getEv,
      onselect:    v._getEv,
      onchange:    v._getEv
    });
  })(Element._attributeTranslations.read.values);
}

else if (Prototype.Browser.Gecko && /rv:1\.8\.0/.test(navigator.userAgent)) {
  Element.Methods.setOpacity = function(element, value) {
    element = $(element);
    element.style.opacity = (value == 1) ? 0.999999 :
      (value === '') ? '' : (value < 0.00001) ? 0 : value;
    return element;
  };
}

else if (Prototype.Browser.WebKit) {
  Element.Methods.setOpacity = function(element, value) {
    element = $(element);
    element.style.opacity = (value == 1 || value === '') ? '' :
      (value < 0.00001) ? 0 : value;

    if (value == 1)
      if(element.tagName.toUpperCase() == 'IMG' && element.width) {
        element.width++; element.width--;
      } else try {
        var n = document.createTextNode(' ');
        element.appendChild(n);
        element.removeChild(n);
      } catch (e) { }

    return element;
  };

  // Safari returns margins on body which is incorrect if the child is absolutely
  // positioned.  For performance reasons, redefine Element#cumulativeOffset for
  // KHTML/WebKit only.
  Element.Methods.cumulativeOffset = function(element) {
    var valueT = 0, valueL = 0;
    do {
      valueT += element.offsetTop  || 0;
      valueL += element.offsetLeft || 0;
      if (element.offsetParent == document.body)
        if (Element.getStyle(element, 'position') == 'absolute') break;

      element = element.offsetParent;
    } while (element);

    return Element._returnOffset(valueL, valueT);
  };
}

if (Prototype.Browser.IE || Prototype.Browser.Opera) {
  // IE and Opera are missing .innerHTML support for TABLE-related and SELECT elements
  Element.Methods.update = function(element, content) {
    element = $(element);

    if (content && content.toElement) content = content.toElement();
    if (Object.isElement(content)) return element.update().insert(content);

    content = Object.toHTML(content);
    var tagName = element.tagName.toUpperCase();

    if (tagName in Element._insertionTranslations.tags) {
      $A(element.childNodes).each(function(node) { element.removeChild(node) });
      Element._getContentFromAnonymousElement(tagName, content.stripScripts())
        .each(function(node) { element.appendChild(node) });
    }
    else element.innerHTML = content.stripScripts();

    content.evalScripts.bind(content).defer();
    return element;
  };
}

if ('outerHTML' in document.createElement('div')) {
  Element.Methods.replace = function(element, content) {
    element = $(element);

    if (content && content.toElement) content = content.toElement();
    if (Object.isElement(content)) {
      element.parentNode.replaceChild(content, element);
      return element;
    }

    content = Object.toHTML(content);
    var parent = element.parentNode, tagName = parent.tagName.toUpperCase();

    if (Element._insertionTranslations.tags[tagName]) {
      var nextSibling = element.next();
      var fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());
      parent.removeChild(element);
      if (nextSibling)
        fragments.each(function(node) { parent.insertBefore(node, nextSibling) });
      else
        fragments.each(function(node) { parent.appendChild(node) });
    }
    else element.outerHTML = content.stripScripts();

    content.evalScripts.bind(content).defer();
    return element;
  };
}

Element._returnOffset = function(l, t) {
  var result = [l, t];
  result.left = l;
  result.top = t;
  return result;
};

Element._getContentFromAnonymousElement = function(tagName, html) {
  var div = new Element('div'), t = Element._insertionTranslations.tags[tagName];
  if (t) {
    div.innerHTML = t[0] + html + t[1];
    t[2].times(function() { div = div.firstChild });
  } else div.innerHTML = html;
  return $A(div.childNodes);
};

Element._insertionTranslations = {
  before: function(element, node) {
    element.parentNode.insertBefore(node, element);
  },
  top: function(element, node) {
    element.insertBefore(node, element.firstChild);
  },
  bottom: function(element, node) {
    element.appendChild(node);
  },
  after: function(element, node) {
    element.parentNode.insertBefore(node, element.nextSibling);
  },
  tags: {
    TABLE:  ['<table>',                '</table>',                   1],
    TBODY:  ['<table><tbody>',         '</tbody></table>',           2],
    TR:     ['<table><tbody><tr>',     '</tr></tbody></table>',      3],
    TD:     ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],
    SELECT: ['<select>',               '</select>',                  1]
  }
};

(function() {
  Object.extend(this.tags, {
    THEAD: this.tags.TBODY,
    TFOOT: this.tags.TBODY,
    TH:    this.tags.TD
  });
}).call(Element._insertionTranslations);

Element.Methods.Simulated = {
  hasAttribute: function(element, attribute) {
    attribute = Element._attributeTranslations.has[attribute] || attribute;
    var node = $(element).getAttributeNode(attribute);
    return !!(node && node.specified);
  }
};

Element.Methods.ByTag = { };

Object.extend(Element, Element.Methods);

if (!Prototype.BrowserFeatures.ElementExtensions &&
    document.createElement('div')['__proto__']) {
  window.HTMLElement = { };
  window.HTMLElement.prototype = document.createElement('div')['__proto__'];
  Prototype.BrowserFeatures.ElementExtensions = true;
}

Element.extend = (function() {
  if (Prototype.BrowserFeatures.SpecificElementExtensions)
    return Prototype.K;

  var Methods = { }, ByTag = Element.Methods.ByTag;

  var extend = Object.extend(function(element) {
    if (!element || element._extendedByPrototype ||
        element.nodeType != 1 || element == window) return element;

    var methods = Object.clone(Methods),
      tagName = element.tagName.toUpperCase(), property, value;

    // extend methods for specific tags
    if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);

    for (property in methods) {
      value = methods[property];
      if (Object.isFunction(value) && !(property in element))
        element[property] = value.methodize();
    }

    element._extendedByPrototype = Prototype.emptyFunction;
    return element;

  }, {
    refresh: function() {
      // extend methods for all tags (Safari doesn't need this)
      if (!Prototype.BrowserFeatures.ElementExtensions) {
        Object.extend(Methods, Element.Methods);
        Object.extend(Methods, Element.Methods.Simulated);
      }
    }
  });

  extend.refresh();
  return extend;
})();

Element.hasAttribute = function(element, attribute) {
  if (element.hasAttribute) return element.hasAttribute(attribute);
  return Element.Methods.Simulated.hasAttribute(element, attribute);
};

Element.addMethods = function(methods) {
  var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;

  if (!methods) {
    Object.extend(Form, Form.Methods);
    Object.extend(Form.Element, Form.Element.Methods);
    Object.extend(Element.Methods.ByTag, {
      "FORM":     Object.clone(Form.Methods),
      "INPUT":    Object.clone(Form.Element.Methods),
      "SELECT":   Object.clone(Form.Element.Methods),
      "TEXTAREA": Object.clone(Form.Element.Methods)
    });
  }

  if (arguments.length == 2) {
    var tagName = methods;
    methods = arguments[1];
  }

  if (!tagName) Object.extend(Element.Methods, methods || { });
  else {
    if (Object.isArray(tagName)) tagName.each(extend);
    else extend(tagName);
  }

  function extend(tagName) {
    tagName = tagName.toUpperCase();
    if (!Element.Methods.ByTag[tagName])
      Element.Methods.ByTag[tagName] = { };
    Object.extend(Element.Methods.ByTag[tagName], methods);
  }

  function copy(methods, destination, onlyIfAbsent) {
    onlyIfAbsent = onlyIfAbsent || false;
    for (var property in methods) {
      var value = methods[property];
      if (!Object.isFunction(value)) continue;
      if (!onlyIfAbsent || !(property in destination))
        destination[property] = value.methodize();
    }
  }

  function findDOMClass(tagName) {
    var klass;
    var trans = {
      "OPTGROUP": "OptGroup", "TEXTAREA": "TextArea", "P": "Paragraph",
      "FIELDSET": "FieldSet", "UL": "UList", "OL": "OList", "DL": "DList",
      "DIR": "Directory", "H1": "Heading", "H2": "Heading", "H3": "Heading",
      "H4": "Heading", "H5": "Heading", "H6": "Heading", "Q": "Quote",
      "INS": "Mod", "DEL": "Mod", "A": "Anchor", "IMG": "Image", "CAPTION":
      "TableCaption", "COL": "TableCol", "COLGROUP": "TableCol", "THEAD":
      "TableSection", "TFOOT": "TableSection", "TBODY": "TableSection", "TR":
      "TableRow", "TH": "TableCell", "TD": "TableCell", "FRAMESET":
      "FrameSet", "IFRAME": "IFrame"
    };
    if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';
    if (window[klass]) return window[klass];
    klass = 'HTML' + tagName + 'Element';
    if (window[klass]) return window[klass];
    klass = 'HTML' + tagName.capitalize() + 'Element';
    if (window[klass]) return window[klass];

    window[klass] = { };
    window[klass].prototype = document.createElement(tagName)['__proto__'];
    return window[klass];
  }

  if (F.ElementExtensions) {
    copy(Element.Methods, HTMLElement.prototype);
    copy(Element.Methods.Simulated, HTMLElement.prototype, true);
  }

  if (F.SpecificElementExtensions) {
    for (var tag in Element.Methods.ByTag) {
      var klass = findDOMClass(tag);
      if (Object.isUndefined(klass)) continue;
      copy(T[tag], klass.prototype);
    }
  }

  Object.extend(Element, Element.Methods);
  delete Element.ByTag;

  if (Element.extend.refresh) Element.extend.refresh();
  Element.cache = { };
};

document.viewport = {
  getDimensions: function() {
    var dimensions = { }, B = Prototype.Browser;
    $w('width height').each(function(d) {
      var D = d.capitalize();
      if (B.WebKit && !document.evaluate) {
        // Safari <3.0 needs self.innerWidth/Height
        dimensions[d] = self['inner' + D];
      } else if (B.Opera && parseFloat(window.opera.version()) < 9.5) {
        // Opera <9.5 needs document.body.clientWidth/Height
        dimensions[d] = document.body['client' + D]
      } else {
        dimensions[d] = document.documentElement['client' + D];
      }
    });
    return dimensions;
  },

  getWidth: function() {
    return this.getDimensions().width;
  },

  getHeight: function() {
    return this.getDimensions().height;
  },

  getScrollOffsets: function() {
    return Element._returnOffset(
      window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,
      window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop);
  }
};
/* Portions of the Selector class are derived from Jack Slocum's DomQuery,
 * part of YUI-Ext version 0.40, distributed under the terms of an MIT-style
 * license.  Please see http://www.yui-ext.com/ for more information. */

var Selector = Class.create({
  initialize: function(expression) {
    this.expression = expression.strip();

    if (this.shouldUseSelectorsAPI()) {
      this.mode = 'selectorsAPI';
    } else if (this.shouldUseXPath()) {
      this.mode = 'xpath';
      this.compileXPathMatcher();
    } else {
      this.mode = "normal";
      this.compileMatcher();
    }

  },

  shouldUseXPath: function() {
    if (!Prototype.BrowserFeatures.XPath) return false;

    var e = this.expression;

    // Safari 3 chokes on :*-of-type and :empty
    if (Prototype.Browser.WebKit &&
     (e.include("-of-type") || e.include(":empty")))
      return false;

    // XPath can't do namespaced attributes, nor can it read
    // the "checked" property from DOM nodes
    if ((/(\[[\w-]*?:|:checked)/).test(e))
      return false;

    return true;
  },

  shouldUseSelectorsAPI: function() {
    if (!Prototype.BrowserFeatures.SelectorsAPI) return false;

    if (!Selector._div) Selector._div = new Element('div');

    // Make sure the browser treats the selector as valid. Test on an
    // isolated element to minimize cost of this check.
    try {
      Selector._div.querySelector(this.expression);
    } catch(e) {
      return false;
    }

    return true;
  },

  compileMatcher: function() {
    var e = this.expression, ps = Selector.patterns, h = Selector.handlers,
        c = Selector.criteria, le, p, m;

    if (Selector._cache[e]) {
      this.matcher = Selector._cache[e];
      return;
    }

    this.matcher = ["this.matcher = function(root) {",
                    "var r = root, h = Selector.handlers, c = false, n;"];

    while (e && le != e && (/\S/).test(e)) {
      le = e;
      for (var i in ps) {
        p = ps[i];
        if (m = e.match(p)) {
          this.matcher.push(Object.isFunction(c[i]) ? c[i](m) :
            new Template(c[i]).evaluate(m));
          e = e.replace(m[0], '');
          break;
        }
      }
    }

    this.matcher.push("return h.unique(n);\n}");
    eval(this.matcher.join('\n'));
    Selector._cache[this.expression] = this.matcher;
  },

  compileXPathMatcher: function() {
    var e = this.expression, ps = Selector.patterns,
        x = Selector.xpath, le, m;

    if (Selector._cache[e]) {
      this.xpath = Selector._cache[e]; return;
    }

    this.matcher = ['.//*'];
    while (e && le != e && (/\S/).test(e)) {
      le = e;
      for (var i in ps) {
        if (m = e.match(ps[i])) {
          this.matcher.push(Object.isFunction(x[i]) ? x[i](m) :
            new Template(x[i]).evaluate(m));
          e = e.replace(m[0], '');
          break;
        }
      }
    }

    this.xpath = this.matcher.join('');
    Selector._cache[this.expression] = this.xpath;
  },

  findElements: function(root) {
    root = root || document;
    var e = this.expression, results;

    switch (this.mode) {
      case 'selectorsAPI':
        // querySelectorAll queries document-wide, then filters to descendants
        // of the context element. That's not what we want.
        // Add an explicit context to the selector if necessary.
        if (root !== document) {
          var oldId = root.id, id = $(root).identify();
          e = "#" + id + " " + e;
        }

        results = $A(root.querySelectorAll(e)).map(Element.extend);
        root.id = oldId;

        return results;
      case 'xpath':
        return document._getElementsByXPath(this.xpath, root);
      default:
       return this.matcher(root);
    }
  },

  match: function(element) {
    this.tokens = [];

    var e = this.expression, ps = Selector.patterns, as = Selector.assertions;
    var le, p, m;

    while (e && le !== e && (/\S/).test(e)) {
      le = e;
      for (var i in ps) {
        p = ps[i];
        if (m = e.match(p)) {
          // use the Selector.assertions methods unless the selector
          // is too complex.
          if (as[i]) {
            this.tokens.push([i, Object.clone(m)]);
            e = e.replace(m[0], '');
          } else {
            // reluctantly do a document-wide search
            // and look for a match in the array
            return this.findElements(document).include(element);
          }
        }
      }
    }

    var match = true, name, matches;
    for (var i = 0, token; token = this.tokens[i]; i++) {
      name = token[0], matches = token[1];
      if (!Selector.assertions[name](element, matches)) {
        match = false; break;
      }
    }

    return match;
  },

  toString: function() {
    return this.expression;
  },

  inspect: function() {
    return "#<Selector:" + this.expression.inspect() + ">";
  }
});

Object.extend(Selector, {
  _cache: { },

  xpath: {
    descendant:   "//*",
    child:        "/*",
    adjacent:     "/following-sibling::*[1]",
    laterSibling: '/following-sibling::*',
    tagName:      function(m) {
      if (m[1] == '*') return '';
      return "[local-name()='" + m[1].toLowerCase() +
             "' or local-name()='" + m[1].toUpperCase() + "']";
    },
    className:    "[contains(concat(' ', @class, ' '), ' #{1} ')]",
    id:           "[@id='#{1}']",
    attrPresence: function(m) {
      m[1] = m[1].toLowerCase();
      return new Template("[@#{1}]").evaluate(m);
    },
    attr: function(m) {
      m[1] = m[1].toLowerCase();
      m[3] = m[5] || m[6];
      return new Template(Selector.xpath.operators[m[2]]).evaluate(m);
    },
    pseudo: function(m) {
      var h = Selector.xpath.pseudos[m[1]];
      if (!h) return '';
      if (Object.isFunction(h)) return h(m);
      return new Template(Selector.xpath.pseudos[m[1]]).evaluate(m);
    },
    operators: {
      '=':  "[@#{1}='#{3}']",
      '!=': "[@#{1}!='#{3}']",
      '^=': "[starts-with(@#{1}, '#{3}')]",
      '$=': "[substring(@#{1}, (string-length(@#{1}) - string-length('#{3}') + 1))='#{3}']",
      '*=': "[contains(@#{1}, '#{3}')]",
      '~=': "[contains(concat(' ', @#{1}, ' '), ' #{3} ')]",
      '|=': "[contains(concat('-', @#{1}, '-'), '-#{3}-')]"
    },
    pseudos: {
      'first-child': '[not(preceding-sibling::*)]',
      'last-child':  '[not(following-sibling::*)]',
      'only-child':  '[not(preceding-sibling::* or following-sibling::*)]',
      'empty':       "[count(*) = 0 and (count(text()) = 0)]",
      'checked':     "[@checked]",
      'disabled':    "[(@disabled) and (@type!='hidden')]",
      'enabled':     "[not(@disabled) and (@type!='hidden')]",
      'not': function(m) {
        var e = m[6], p = Selector.patterns,
            x = Selector.xpath, le, v;

        var exclusion = [];
        while (e && le != e && (/\S/).test(e)) {
          le = e;
          for (var i in p) {
            if (m = e.match(p[i])) {
              v = Object.isFunction(x[i]) ? x[i](m) : new Template(x[i]).evaluate(m);
              exclusion.push("(" + v.substring(1, v.length - 1) + ")");
              e = e.replace(m[0], '');
              break;
            }
          }
        }
        return "[not(" + exclusion.join(" and ") + ")]";
      },
      'nth-child':      function(m) {
        return Selector.xpath.pseudos.nth("(count(./preceding-sibling::*) + 1) ", m);
      },
      'nth-last-child': function(m) {
        return Selector.xpath.pseudos.nth("(count(./following-sibling::*) + 1) ", m);
      },
      'nth-of-type':    function(m) {
        return Selector.xpath.pseudos.nth("position() ", m);
      },
      'nth-last-of-type': function(m) {
        return Selector.xpath.pseudos.nth("(last() + 1 - position()) ", m);
      },
      'first-of-type':  function(m) {
        m[6] = "1"; return Selector.xpath.pseudos['nth-of-type'](m);
      },
      'last-of-type':   function(m) {
        m[6] = "1"; return Selector.xpath.pseudos['nth-last-of-type'](m);
      },
      'only-of-type':   function(m) {
        var p = Selector.xpath.pseudos; return p['first-of-type'](m) + p['last-of-type'](m);
      },
      nth: function(fragment, m) {
        var mm, formula = m[6], predicate;
        if (formula == 'even') formula = '2n+0';
        if (formula == 'odd')  formula = '2n+1';
        if (mm = formula.match(/^(\d+)$/)) // digit only
          return '[' + fragment + "= " + mm[1] + ']';
        if (mm = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
          if (mm[1] == "-") mm[1] = -1;
          var a = mm[1] ? Number(mm[1]) : 1;
          var b = mm[2] ? Number(mm[2]) : 0;
          predicate = "[((#{fragment} - #{b}) mod #{a} = 0) and " +
          "((#{fragment} - #{b}) div #{a} >= 0)]";
          return new Template(predicate).evaluate({
            fragment: fragment, a: a, b: b });
        }
      }
    }
  },

  criteria: {
    tagName:      'n = h.tagName(n, r, "#{1}", c);      c = false;',
    className:    'n = h.className(n, r, "#{1}", c);    c = false;',
    id:           'n = h.id(n, r, "#{1}", c);           c = false;',
    attrPresence: 'n = h.attrPresence(n, r, "#{1}", c); c = false;',
    attr: function(m) {
      m[3] = (m[5] || m[6]);
      return new Template('n = h.attr(n, r, "#{1}", "#{3}", "#{2}", c); c = false;').evaluate(m);
    },
    pseudo: function(m) {
      if (m[6]) m[6] = m[6].replace(/"/g, '\\"');
      return new Template('n = h.pseudo(n, "#{1}", "#{6}", r, c); c = false;').evaluate(m);
    },
    descendant:   'c = "descendant";',
    child:        'c = "child";',
    adjacent:     'c = "adjacent";',
    laterSibling: 'c = "laterSibling";'
  },

  patterns: {
    // combinators must be listed first
    // (and descendant needs to be last combinator)
    laterSibling: /^\s*~\s*/,
    child:        /^\s*>\s*/,
    adjacent:     /^\s*\+\s*/,
    descendant:   /^\s/,

    // selectors follow
    tagName:      /^\s*(\*|[\w\-]+)(\b|$)?/,
    id:           /^#([\w\-\*]+)(\b|$)/,
    className:    /^\.([\w\-\*]+)(\b|$)/,
    pseudo:
/^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s|[:+~>]))/,
    attrPresence: /^\[((?:[\w]+:)?[\w]+)\]/,
    attr:         /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/
  },

  // for Selector.match and Element#match
  assertions: {
    tagName: function(element, matches) {
      return matches[1].toUpperCase() == element.tagName.toUpperCase();
    },

    className: function(element, matches) {
      return Element.hasClassName(element, matches[1]);
    },

    id: function(element, matches) {
      return element.id === matches[1];
    },

    attrPresence: function(element, matches) {
      return Element.hasAttribute(element, matches[1]);
    },

    attr: function(element, matches) {
      var nodeValue = Element.readAttribute(element, matches[1]);
      return nodeValue && Selector.operators[matches[2]](nodeValue, matches[5] || matches[6]);
    }
  },

  handlers: {
    // UTILITY FUNCTIONS
    // joins two collections
    concat: function(a, b) {
      for (var i = 0, node; node = b[i]; i++)
        a.push(node);
      return a;
    },

    // marks an array of nodes for counting
    mark: function(nodes) {
      var _true = Prototype.emptyFunction;
      for (var i = 0, node; node = nodes[i]; i++)
        node._countedByPrototype = _true;
      return nodes;
    },

    unmark: function(nodes) {
      for (var i = 0, node; node = nodes[i]; i++)
        node._countedByPrototype = undefined;
      return nodes;
    },

    // mark each child node with its position (for nth calls)
    // "ofType" flag indicates whether we're indexing for nth-of-type
    // rather than nth-child
    index: function(parentNode, reverse, ofType) {
      parentNode._countedByPrototype = Prototype.emptyFunction;
      if (reverse) {
        for (var nodes = parentNode.childNodes, i = nodes.length - 1, j = 1; i >= 0; i--) {
          var node = nodes[i];
          if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
        }
      } else {
        for (var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++)
          if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;
      }
    },

    // filters out duplicates and extends all nodes
    unique: function(nodes) {
      if (nodes.length == 0) return nodes;
      var results = [], n;
      for (var i = 0, l = nodes.length; i < l; i++)
        if (!(n = nodes[i])._countedByPrototype) {
          n._countedByPrototype = Prototype.emptyFunction;
          results.push(Element.extend(n));
        }
      return Selector.handlers.unmark(results);
    },

    // COMBINATOR FUNCTIONS
    descendant: function(nodes) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        h.concat(results, node.getElementsByTagName('*'));
      return results;
    },

    child: function(nodes) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        for (var j = 0, child; child = node.childNodes[j]; j++)
          if (child.nodeType == 1 && child.tagName != '!') results.push(child);
      }
      return results;
    },

    adjacent: function(nodes) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        var next = this.nextElementSibling(node);
        if (next) results.push(next);
      }
      return results;
    },

    laterSibling: function(nodes) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        h.concat(results, Element.nextSiblings(node));
      return results;
    },

    nextElementSibling: function(node) {
      while (node = node.nextSibling)
        if (node.nodeType == 1) return node;
      return null;
    },

    previousElementSibling: function(node) {
      while (node = node.previousSibling)
        if (node.nodeType == 1) return node;
      return null;
    },

    // TOKEN FUNCTIONS
    tagName: function(nodes, root, tagName, combinator) {
      var uTagName = tagName.toUpperCase();
      var results = [], h = Selector.handlers;
      if (nodes) {
        if (combinator) {
          // fastlane for ordinary descendant combinators
          if (combinator == "descendant") {
            for (var i = 0, node; node = nodes[i]; i++)
              h.concat(results, node.getElementsByTagName(tagName));
            return results;
          } else nodes = this[combinator](nodes);
          if (tagName == "*") return nodes;
        }
        for (var i = 0, node; node = nodes[i]; i++)
          if (node.tagName.toUpperCase() === uTagName) results.push(node);
        return results;
      } else return root.getElementsByTagName(tagName);
    },

    id: function(nodes, root, id, combinator) {
      var targetNode = $(id), h = Selector.handlers;
      if (!targetNode) return [];
      if (!nodes && root == document) return [targetNode];
      if (nodes) {
        if (combinator) {
          if (combinator == 'child') {
            for (var i = 0, node; node = nodes[i]; i++)
              if (targetNode.parentNode == node) return [targetNode];
          } else if (combinator == 'descendant') {
            for (var i = 0, node; node = nodes[i]; i++)
              if (Element.descendantOf(targetNode, node)) return [targetNode];
          } else if (combinator == 'adjacent') {
            for (var i = 0, node; node = nodes[i]; i++)
              if (Selector.handlers.previousElementSibling(targetNode) == node)
                return [targetNode];
          } else nodes = h[combinator](nodes);
        }
        for (var i = 0, node; node = nodes[i]; i++)
          if (node == targetNode) return [targetNode];
        return [];
      }
      return (targetNode && Element.descendantOf(targetNode, root)) ? [targetNode] : [];
    },

    className: function(nodes, root, className, combinator) {
      if (nodes && combinator) nodes = this[combinator](nodes);
      return Selector.handlers.byClassName(nodes, root, className);
    },

    byClassName: function(nodes, root, className) {
      if (!nodes) nodes = Selector.handlers.descendant([root]);
      var needle = ' ' + className + ' ';
      for (var i = 0, results = [], node, nodeClassName; node = nodes[i]; i++) {
        nodeClassName = node.className;
        if (nodeClassName.length == 0) continue;
        if (nodeClassName == className || (' ' + nodeClassName + ' ').include(needle))
          results.push(node);
      }
      return results;
    },

    attrPresence: function(nodes, root, attr, combinator) {
      if (!nodes) nodes = root.getElementsByTagName("*");
      if (nodes && combinator) nodes = this[combinator](nodes);
      var results = [];
      for (var i = 0, node; node = nodes[i]; i++)
        if (Element.hasAttribute(node, attr)) results.push(node);
      return results;
    },

    attr: function(nodes, root, attr, value, operator, combinator) {
      if (!nodes) nodes = root.getElementsByTagName("*");
      if (nodes && combinator) nodes = this[combinator](nodes);
      var handler = Selector.operators[operator], results = [];
      for (var i = 0, node; node = nodes[i]; i++) {
        var nodeValue = Element.readAttribute(node, attr);
        if (nodeValue === null) continue;
        if (handler(nodeValue, value)) results.push(node);
      }
      return results;
    },

    pseudo: function(nodes, name, value, root, combinator) {
      if (nodes && combinator) nodes = this[combinator](nodes);
      if (!nodes) nodes = root.getElementsByTagName("*");
      return Selector.pseudos[name](nodes, value, root);
    }
  },

  pseudos: {
    'first-child': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        if (Selector.handlers.previousElementSibling(node)) continue;
          results.push(node);
      }
      return results;
    },
    'last-child': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        if (Selector.handlers.nextElementSibling(node)) continue;
          results.push(node);
      }
      return results;
    },
    'only-child': function(nodes, value, root) {
      var h = Selector.handlers;
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (!h.previousElementSibling(node) && !h.nextElementSibling(node))
          results.push(node);
      return results;
    },
    'nth-child':        function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root);
    },
    'nth-last-child':   function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root, true);
    },
    'nth-of-type':      function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root, false, true);
    },
    'nth-last-of-type': function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, formula, root, true, true);
    },
    'first-of-type':    function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, "1", root, false, true);
    },
    'last-of-type':     function(nodes, formula, root) {
      return Selector.pseudos.nth(nodes, "1", root, true, true);
    },
    'only-of-type':     function(nodes, formula, root) {
      var p = Selector.pseudos;
      return p['last-of-type'](p['first-of-type'](nodes, formula, root), formula, root);
    },

    // handles the an+b logic
    getIndices: function(a, b, total) {
      if (a == 0) return b > 0 ? [b] : [];
      return $R(1, total).inject([], function(memo, i) {
        if (0 == (i - b) % a && (i - b) / a >= 0) memo.push(i);
        return memo;
      });
    },

    // handles nth(-last)-child, nth(-last)-of-type, and (first|last)-of-type
    nth: function(nodes, formula, root, reverse, ofType) {
      if (nodes.length == 0) return [];
      if (formula == 'even') formula = '2n+0';
      if (formula == 'odd')  formula = '2n+1';
      var h = Selector.handlers, results = [], indexed = [], m;
      h.mark(nodes);
      for (var i = 0, node; node = nodes[i]; i++) {
        if (!node.parentNode._countedByPrototype) {
          h.index(node.parentNode, reverse, ofType);
          indexed.push(node.parentNode);
        }
      }
      if (formula.match(/^\d+$/)) { // just a number
        formula = Number(formula);
        for (var i = 0, node; node = nodes[i]; i++)
          if (node.nodeIndex == formula) results.push(node);
      } else if (m = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b
        if (m[1] == "-") m[1] = -1;
        var a = m[1] ? Number(m[1]) : 1;
        var b = m[2] ? Number(m[2]) : 0;
        var indices = Selector.pseudos.getIndices(a, b, nodes.length);
        for (var i = 0, node, l = indices.length; node = nodes[i]; i++) {
          for (var j = 0; j < l; j++)
            if (node.nodeIndex == indices[j]) results.push(node);
        }
      }
      h.unmark(nodes);
      h.unmark(indexed);
      return results;
    },

    'empty': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++) {
        // IE treats comments as element nodes
        if (node.tagName == '!' || node.firstChild) continue;
        results.push(node);
      }
      return results;
    },

    'not': function(nodes, selector, root) {
      var h = Selector.handlers, selectorType, m;
      var exclusions = new Selector(selector).findElements(root);
      h.mark(exclusions);
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (!node._countedByPrototype) results.push(node);
      h.unmark(exclusions);
      return results;
    },

    'enabled': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (!node.disabled && (!node.type || node.type !== 'hidden'))
          results.push(node);
      return results;
    },

    'disabled': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (node.disabled) results.push(node);
      return results;
    },

    'checked': function(nodes, value, root) {
      for (var i = 0, results = [], node; node = nodes[i]; i++)
        if (node.checked) results.push(node);
      return results;
    }
  },

  operators: {
    '=':  function(nv, v) { return nv == v; },
    '!=': function(nv, v) { return nv != v; },
    '^=': function(nv, v) { return nv == v || nv && nv.startsWith(v); },
    '$=': function(nv, v) { return nv == v || nv && nv.endsWith(v); },
    '*=': function(nv, v) { return nv == v || nv && nv.include(v); },
    '$=': function(nv, v) { return nv.endsWith(v); },
    '*=': function(nv, v) { return nv.include(v); },
    '~=': function(nv, v) { return (' ' + nv + ' ').include(' ' + v + ' '); },
    '|=': function(nv, v) { return ('-' + (nv || "").toUpperCase() +
     '-').include('-' + (v || "").toUpperCase() + '-'); }
  },

  split: function(expression) {
    var expressions = [];
    expression.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m) {
      expressions.push(m[1].strip());
    });
    return expressions;
  },

  matchElements: function(elements, expression) {
    var matches = $$(expression), h = Selector.handlers;
    h.mark(matches);
    for (var i = 0, results = [], element; element = elements[i]; i++)
      if (element._countedByPrototype) results.push(element);
    h.unmark(matches);
    return results;
  },

  findElement: function(elements, expression, index) {
    if (Object.isNumber(expression)) {
      index = expression; expression = false;
    }
    return Selector.matchElements(elements, expression || '*')[index || 0];
  },

  findChildElements: function(element, expressions) {
    expressions = Selector.split(expressions.join(','));
    var results = [], h = Selector.handlers;
    for (var i = 0, l = expressions.length, selector; i < l; i++) {
      selector = new Selector(expressions[i].strip());
      h.concat(results, selector.findElements(element));
    }
    return (l > 1) ? h.unique(results) : results;
  }
});

if (Prototype.Browser.IE) {
  Object.extend(Selector.handlers, {
    // IE returns comment nodes on getElementsByTagName("*").
    // Filter them out.
    concat: function(a, b) {
      for (var i = 0, node; node = b[i]; i++)
        if (node.tagName !== "!") a.push(node);
      return a;
    },

    // IE improperly serializes _countedByPrototype in (inner|outer)HTML.
    unmark: function(nodes) {
      for (var i = 0, node; node = nodes[i]; i++)
        node.removeAttribute('_countedByPrototype');
      return nodes;
    }
  });
}

function $$() {
  return Selector.findChildElements(document, $A(arguments));
}
var Form = {
  reset: function(form) {
    $(form).reset();
    return form;
  },

  serializeElements: function(elements, options) {
    if (typeof options != 'object') options = { hash: !!options };
    else if (Object.isUndefined(options.hash)) options.hash = true;
    var key, value, submitted = false, submit = options.submit;

    var data = elements.inject({ }, function(result, element) {
      if (!element.disabled && element.name) {
        key = element.name; value = $(element).getValue();
        if (value != null && element.type != 'file' && (element.type != 'submit' || (!submitted &&
            submit !== false && (!submit || key == submit) && (submitted = true)))) {
          if (key in result) {
            // a key is already present; construct an array of values
            if (!Object.isArray(result[key])) result[key] = [result[key]];
            result[key].push(value);
          }
          else result[key] = value;
        }
      }
      return result;
    });

    return options.hash ? data : Object.toQueryString(data);
  }
};

Form.Methods = {
  serialize: function(form, options) {
    return Form.serializeElements(Form.getElements(form), options);
  },

  getElements: function(form) {
    return $A($(form).getElementsByTagName('*')).inject([],
      function(elements, child) {
        if (Form.Element.Serializers[child.tagName.toLowerCase()])
          elements.push(Element.extend(child));
        return elements;
      }
    );
  },

  getInputs: function(form, typeName, name) {
    form = $(form);
    var inputs = form.getElementsByTagName('input');

    if (!typeName && !name) return $A(inputs).map(Element.extend);

    for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
      var input = inputs[i];
      if ((typeName && input.type != typeName) || (name && input.name != name))
        continue;
      matchingInputs.push(Element.extend(input));
    }

    return matchingInputs;
  },

  disable: function(form) {
    form = $(form);
    Form.getElements(form).invoke('disable');
    return form;
  },

  enable: function(form) {
    form = $(form);
    Form.getElements(form).invoke('enable');
    return form;
  },

  findFirstElement: function(form) {
    var elements = $(form).getElements().findAll(function(element) {
      return 'hidden' != element.type && !element.disabled;
    });
    var firstByIndex = elements.findAll(function(element) {
      return element.hasAttribute('tabIndex') && element.tabIndex >= 0;
    }).sortBy(function(element) { return element.tabIndex }).first();

    return firstByIndex ? firstByIndex : elements.find(function(element) {
      return ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
    });
  },

  focusFirstElement: function(form) {
    form = $(form);
    form.findFirstElement().activate();
    return form;
  },

  request: function(form, options) {
    form = $(form), options = Object.clone(options || { });

    var params = options.parameters, action = form.readAttribute('action') || '';
    if (action.blank()) action = window.location.href;
    options.parameters = form.serialize(true);

    if (params) {
      if (Object.isString(params)) params = params.toQueryParams();
      Object.extend(options.parameters, params);
    }

    if (form.hasAttribute('method') && !options.method)
      options.method = form.method;

    return new Ajax.Request(action, options);
  }
};

/*--------------------------------------------------------------------------*/

Form.Element = {
  focus: function(element) {
    $(element).focus();
    return element;
  },

  select: function(element) {
    $(element).select();
    return element;
  }
};

Form.Element.Methods = {
  serialize: function(element) {
    element = $(element);
    if (!element.disabled && element.name) {
      var value = element.getValue();
      if (value != undefined) {
        var pair = { };
        pair[element.name] = value;
        return Object.toQueryString(pair);
      }
    }
    return '';
  },

  getValue: function(element) {
    element = $(element);
    var method = element.tagName.toLowerCase();
    return Form.Element.Serializers[method](element);
  },

  setValue: function(element, value) {
    element = $(element);
    var method = element.tagName.toLowerCase();
    Form.Element.Serializers[method](element, value);
    return element;
  },

  clear: function(element) {
    $(element).value = '';
    return element;
  },

  present: function(element) {
    return $(element).value != '';
  },

  activate: function(element) {
    element = $(element);
    try {
      element.focus();
      if (element.select && (element.tagName.toLowerCase() != 'input' ||
          !['button', 'reset', 'submit'].include(element.type)))
        element.select();
    } catch (e) { }
    return element;
  },

  disable: function(element) {
    element = $(element);
    element.disabled = true;
    return element;
  },

  enable: function(element) {
    element = $(element);
    element.disabled = false;
    return element;
  }
};

/*--------------------------------------------------------------------------*/

var Field = Form.Element;
var $F = Form.Element.Methods.getValue;

/*--------------------------------------------------------------------------*/

Form.Element.Serializers = {
  input: function(element, value) {
    switch (element.type.toLowerCase()) {
      case 'checkbox':
      case 'radio':
        return Form.Element.Serializers.inputSelector(element, value);
      default:
        return Form.Element.Serializers.textarea(element, value);
    }
  },

  inputSelector: function(element, value) {
    if (Object.isUndefined(value)) return element.checked ? element.value : null;
    else element.checked = !!value;
  },

  textarea: function(element, value) {
    if (Object.isUndefined(value)) return element.value;
    else element.value = value;
  },

  select: function(element, value) {
    if (Object.isUndefined(value))
      return this[element.type == 'select-one' ?
        'selectOne' : 'selectMany'](element);
    else {
      var opt, currentValue, single = !Object.isArray(value);
      for (var i = 0, length = element.length; i < length; i++) {
        opt = element.options[i];
        currentValue = this.optionValue(opt);
        if (single) {
          if (currentValue == value) {
            opt.selected = true;
            return;
          }
        }
        else opt.selected = value.include(currentValue);
      }
    }
  },

  selectOne: function(element) {
    var index = element.selectedIndex;
    return index >= 0 ? this.optionValue(element.options[index]) : null;
  },

  selectMany: function(element) {
    var values, length = element.length;
    if (!length) return null;

    for (var i = 0, values = []; i < length; i++) {
      var opt = element.options[i];
      if (opt.selected) values.push(this.optionValue(opt));
    }
    return values;
  },

  optionValue: function(opt) {
    // extend element because hasAttribute may not be native
    return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text;
  }
};

/*--------------------------------------------------------------------------*/

Abstract.TimedObserver = Class.create(PeriodicalExecuter, {
  initialize: function($super, element, frequency, callback) {
    $super(callback, frequency);
    this.element   = $(element);
    this.lastValue = this.getValue();
  },

  execute: function() {
    var value = this.getValue();
    if (Object.isString(this.lastValue) && Object.isString(value) ?
        this.lastValue != value : String(this.lastValue) != String(value)) {
      this.callback(this.element, value);
      this.lastValue = value;
    }
  }
});

Form.Element.Observer = Class.create(Abstract.TimedObserver, {
  getValue: function() {
    return Form.Element.getValue(this.element);
  }
});

Form.Observer = Class.create(Abstract.TimedObserver, {
  getValue: function() {
    return Form.serialize(this.element);
  }
});

/*--------------------------------------------------------------------------*/

Abstract.EventObserver = Class.create({
  initialize: function(element, callback) {
    this.element  = $(element);
    this.callback = callback;

    this.lastValue = this.getValue();
    if (this.element.tagName.toLowerCase() == 'form')
      this.registerFormCallbacks();
    else
      this.registerCallback(this.element);
  },

  onElementEvent: function() {
    var value = this.getValue();
    if (this.lastValue != value) {
      this.callback(this.element, value);
      this.lastValue = value;
    }
  },

  registerFormCallbacks: function() {
    Form.getElements(this.element).each(this.registerCallback, this);
  },

  registerCallback: function(element) {
    if (element.type) {
      switch (element.type.toLowerCase()) {
        case 'checkbox':
        case 'radio':
          Event.observe(element, 'click', this.onElementEvent.bind(this));
          break;
        default:
          Event.observe(element, 'change', this.onElementEvent.bind(this));
          break;
      }
    }
  }
});

Form.Element.EventObserver = Class.create(Abstract.EventObserver, {
  getValue: function() {
    return Form.Element.getValue(this.element);
  }
});

Form.EventObserver = Class.create(Abstract.EventObserver, {
  getValue: function() {
    return Form.serialize(this.element);
  }
});
if (!window.Event) var Event = { };

Object.extend(Event, {
  KEY_BACKSPACE: 8,
  KEY_TAB:       9,
  KEY_RETURN:   13,
  KEY_ESC:      27,
  KEY_LEFT:     37,
  KEY_UP:       38,
  KEY_RIGHT:    39,
  KEY_DOWN:     40,
  KEY_DELETE:   46,
  KEY_HOME:     36,
  KEY_END:      35,
  KEY_PAGEUP:   33,
  KEY_PAGEDOWN: 34,
  KEY_INSERT:   45,

  cache: { },

  relatedTarget: function(event) {
    var element;
    switch(event.type) {
      case 'mouseover': element = event.fromElement; break;
      case 'mouseout':  element = event.toElement;   break;
      default: return null;
    }
    return Element.extend(element);
  }
});

Event.Methods = (function() {
  var isButton;

  if (Prototype.Browser.IE) {
    var buttonMap = { 0: 1, 1: 4, 2: 2 };
    isButton = function(event, code) {
      return event.button == buttonMap[code];
    };

  } else if (Prototype.Browser.WebKit) {
    isButton = function(event, code) {
      switch (code) {
        case 0: return event.which == 1 && !event.metaKey;
        case 1: return event.which == 1 && event.metaKey;
        default: return false;
      }
    };

  } else {
    isButton = function(event, code) {
      return event.which ? (event.which === code + 1) : (event.button === code);
    };
  }

  return {
    isLeftClick:   function(event) { return isButton(event, 0) },
    isMiddleClick: function(event) { return isButton(event, 1) },
    isRightClick:  function(event) { return isButton(event, 2) },

    element: function(event) {
      event = Event.extend(event);

      var node          = event.target,
          type          = event.type,
          currentTarget = event.currentTarget;

      if (currentTarget && currentTarget.tagName) {
        // Firefox screws up the "click" event when moving between radio buttons
        // via arrow keys. It also screws up the "load" and "error" events on images,
        // reporting the document as the target instead of the original image.
        if (type === 'load' || type === 'error' ||
          (type === 'click' && currentTarget.tagName.toLowerCase() === 'input'
            && currentTarget.type === 'radio'))
              node = currentTarget;
      }
      if (node.nodeType == Node.TEXT_NODE) node = node.parentNode;
      return Element.extend(node);
    },

    findElement: function(event, expression) {
      var element = Event.element(event);
      if (!expression) return element;
      var elements = [element].concat(element.ancestors());
      return Selector.findElement(elements, expression, 0);
    },

    pointer: function(event) {
      var docElement = document.documentElement,
      body = document.body || { scrollLeft: 0, scrollTop: 0 };
      return {
        x: event.pageX || (event.clientX +
          (docElement.scrollLeft || body.scrollLeft) -
          (docElement.clientLeft || 0)),
        y: event.pageY || (event.clientY +
          (docElement.scrollTop || body.scrollTop) -
          (docElement.clientTop || 0))
      };
    },

    pointerX: function(event) { return Event.pointer(event).x },
    pointerY: function(event) { return Event.pointer(event).y },

    stop: function(event) {
      Event.extend(event);
      event.preventDefault();
      event.stopPropagation();
      event.stopped = true;
    }
  };
})();

Event.extend = (function() {
  var methods = Object.keys(Event.Methods).inject({ }, function(m, name) {
    m[name] = Event.Methods[name].methodize();
    return m;
  });

  if (Prototype.Browser.IE) {
    Object.extend(methods, {
      stopPropagation: function() { this.cancelBubble = true },
      preventDefault:  function() { this.returnValue = false },
      inspect: function() { return "[object Event]" }
    });

    return function(event) {
      if (!event) return false;
      if (event._extendedByPrototype) return event;

      event._extendedByPrototype = Prototype.emptyFunction;
      var pointer = Event.pointer(event);
      Object.extend(event, {
        target: event.srcElement,
        relatedTarget: Event.relatedTarget(event),
        pageX:  pointer.x,
        pageY:  pointer.y
      });
      return Object.extend(event, methods);
    };

  } else {
    Event.prototype = Event.prototype || document.createEvent("HTMLEvents")['__proto__'];
    Object.extend(Event.prototype, methods);
    return Prototype.K;
  }
})();

Object.extend(Event, (function() {
  var cache = Event.cache;

  function getEventID(element) {
    if (element._prototypeEventID) return element._prototypeEventID[0];
    arguments.callee.id = arguments.callee.id || 1;
    return element._prototypeEventID = [++arguments.callee.id];
  }

  function getDOMEventName(eventName) {
    if (eventName && eventName.include(':')) return "dataavailable";
    return eventName;
  }

  function getCacheForID(id) {
    return cache[id] = cache[id] || { };
  }

  function getWrappersForEventName(id, eventName) {
    var c = getCacheForID(id);
    return c[eventName] = c[eventName] || [];
  }

  function createWrapper(element, eventName, handler) {
    var id = getEventID(element);
    var c = getWrappersForEventName(id, eventName);
    if (c.pluck("handler").include(handler)) return false;

    var wrapper = function(event) {
      if (!Event || !Event.extend ||
        (event.eventName && event.eventName != eventName))
          return false;

      Event.extend(event);
      handler.call(element, event);
    };

    wrapper.handler = handler;
    c.push(wrapper);
    return wrapper;
  }

  function findWrapper(id, eventName, handler) {
    var c = getWrappersForEventName(id, eventName);
    return c.find(function(wrapper) { return wrapper.handler == handler });
  }

  function destroyWrapper(id, eventName, handler) {
    var c = getCacheForID(id);
    if (!c[eventName]) return false;
    c[eventName] = c[eventName].without(findWrapper(id, eventName, handler));
  }

  function destroyCache() {
    for (var id in cache)
      for (var eventName in cache[id])
        cache[id][eventName] = null;
  }


  // Internet Explorer needs to remove event handlers on page unload
  // in order to avoid memory leaks.
  if (window.attachEvent) {
    window.attachEvent("onunload", destroyCache);
  }

  // Safari has a dummy event handler on page unload so that it won't
  // use its bfcache. Safari <= 3.1 has an issue with restoring the "document"
  // object when page is returned to via the back button using its bfcache.
  if (Prototype.Browser.WebKit) {
    window.addEventListener('unload', Prototype.emptyFunction, false);
  }

  return {
    observe: function(element, eventName, handler) {
      element = $(element);
      var name = getDOMEventName(eventName);

      var wrapper = createWrapper(element, eventName, handler);
      if (!wrapper) return element;

      if (element.addEventListener) {
        element.addEventListener(name, wrapper, false);
      } else {
        element.attachEvent("on" + name, wrapper);
      }

      return element;
    },

    stopObserving: function(element, eventName, handler) {
      element = $(element);
      var id = getEventID(element), name = getDOMEventName(eventName);

      if (!handler && eventName) {
        getWrappersForEventName(id, eventName).each(function(wrapper) {
          element.stopObserving(eventName, wrapper.handler);
        });
        return element;

      } else if (!eventName) {
        Object.keys(getCacheForID(id)).each(function(eventName) {
          element.stopObserving(eventName);
        });
        return element;
      }

      var wrapper = findWrapper(id, eventName, handler);
      if (!wrapper) return element;

      if (element.removeEventListener) {
        element.removeEventListener(name, wrapper, false);
      } else {
        element.detachEvent("on" + name, wrapper);
      }

      destroyWrapper(id, eventName, handler);

      return element;
    },

    fire: function(element, eventName, memo) {
      element = $(element);
      if (element == document && document.createEvent && !element.dispatchEvent)
        element = document.documentElement;

      var event;
      if (document.createEvent) {
        event = document.createEvent("HTMLEvents");
        event.initEvent("dataavailable", true, true);
      } else {
        event = document.createEventObject();
        event.eventType = "ondataavailable";
      }

      event.eventName = eventName;
      event.memo = memo || { };

      if (document.createEvent) {
        element.dispatchEvent(event);
      } else {
        element.fireEvent(event.eventType, event);
      }

      return Event.extend(event);
    }
  };
})());

Object.extend(Event, Event.Methods);

Element.addMethods({
  fire:          Event.fire,
  observe:       Event.observe,
  stopObserving: Event.stopObserving
});

Object.extend(document, {
  fire:          Element.Methods.fire.methodize(),
  observe:       Element.Methods.observe.methodize(),
  stopObserving: Element.Methods.stopObserving.methodize(),
  loaded:        false
});

(function() {
  /* Support for the DOMContentLoaded event is based on work by Dan Webb,
     Matthias Miller, Dean Edwards and John Resig. */

  var timer;

  function fireContentLoadedEvent() {
    if (document.loaded) return;
    if (timer) window.clearInterval(timer);
    document.fire("dom:loaded");
    document.loaded = true;
  }

  if (document.addEventListener) {
    if (Prototype.Browser.WebKit) {
      timer = window.setInterval(function() {
        if (/loaded|complete/.test(document.readyState))
          fireContentLoadedEvent();
      }, 0);

      Event.observe(window, "load", fireContentLoadedEvent);

    } else {
      document.addEventListener("DOMContentLoaded",
        fireContentLoadedEvent, false);
    }

  } else {
    document.write("<script id=__onDOMContentLoaded defer src=//:><\/script>");
    $("__onDOMContentLoaded").onreadystatechange = function() {
      if (this.readyState == "complete") {
        this.onreadystatechange = null;
        fireContentLoadedEvent();
      }
    };
  }
})();
/*------------------------------- DEPRECATED -------------------------------*/

Hash.toQueryString = Object.toQueryString;

var Toggle = { display: Element.toggle };

Element.Methods.childOf = Element.Methods.descendantOf;

var Insertion = {
  Before: function(element, content) {
    return Element.insert(element, {before:content});
  },

  Top: function(element, content) {
    return Element.insert(element, {top:content});
  },

  Bottom: function(element, content) {
    return Element.insert(element, {bottom:content});
  },

  After: function(element, content) {
    return Element.insert(element, {after:content});
  }
};

var $continue = new Error('"throw $continue" is deprecated, use "return" instead');

// This should be moved to script.aculo.us; notice the deprecated methods
// further below, that map to the newer Element methods.
var Position = {
  // set to true if needed, warning: firefox performance problems
  // NOT neeeded for page scrolling, only if draggable contained in
  // scrollable elements
  includeScrollOffsets: false,

  // must be called before calling withinIncludingScrolloffset, every time the
  // page is scrolled
  prepare: function() {
    this.deltaX =  window.pageXOffset
                || document.documentElement.scrollLeft
                || document.body.scrollLeft
                || 0;
    this.deltaY =  window.pageYOffset
                || document.documentElement.scrollTop
                || document.body.scrollTop
                || 0;
  },

  // caches x/y coordinate pair to use with overlap
  within: function(element, x, y) {
    if (this.includeScrollOffsets)
      return this.withinIncludingScrolloffsets(element, x, y);
    this.xcomp = x;
    this.ycomp = y;
    this.offset = Element.cumulativeOffset(element);

    return (y >= this.offset[1] &&
            y <  this.offset[1] + element.offsetHeight &&
            x >= this.offset[0] &&
            x <  this.offset[0] + element.offsetWidth);
  },

  withinIncludingScrolloffsets: function(element, x, y) {
    var offsetcache = Element.cumulativeScrollOffset(element);

    this.xcomp = x + offsetcache[0] - this.deltaX;
    this.ycomp = y + offsetcache[1] - this.deltaY;
    this.offset = Element.cumulativeOffset(element);

    return (this.ycomp >= this.offset[1] &&
            this.ycomp <  this.offset[1] + element.offsetHeight &&
            this.xcomp >= this.offset[0] &&
            this.xcomp <  this.offset[0] + element.offsetWidth);
  },

  // within must be called directly before
  overlap: function(mode, element) {
    if (!mode) return 0;
    if (mode == 'vertical')
      return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
        element.offsetHeight;
    if (mode == 'horizontal')
      return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
        element.offsetWidth;
  },

  // Deprecation layer -- use newer Element methods now (1.5.2).

  cumulativeOffset: Element.Methods.cumulativeOffset,

  positionedOffset: Element.Methods.positionedOffset,

  absolutize: function(element) {
    Position.prepare();
    return Element.absolutize(element);
  },

  relativize: function(element) {
    Position.prepare();
    return Element.relativize(element);
  },

  realOffset: Element.Methods.cumulativeScrollOffset,

  offsetParent: Element.Methods.getOffsetParent,

  page: Element.Methods.viewportOffset,

  clone: function(source, target, options) {
    options = options || { };
    return Element.clonePosition(target, source, options);
  }
};

/*--------------------------------------------------------------------------*/

if (!document.getElementsByClassName) document.getElementsByClassName = function(instanceMethods){
  function iter(name) {
    return name.blank() ? null : "[contains(concat(' ', @class, ' '), ' " + name + " ')]";
  }

  instanceMethods.getElementsByClassName = Prototype.BrowserFeatures.XPath ?
  function(element, className) {
    className = className.toString().strip();
    var cond = /\s/.test(className) ? $w(className).map(iter).join('') : iter(className);
    return cond ? document._getElementsByXPath('.//*' + cond, element) : [];
  } : function(element, className) {
    className = className.toString().strip();
    var elements = [], classNames = (/\s/.test(className) ? $w(className) : null);
    if (!classNames && !className) return elements;

    var nodes = $(element).getElementsByTagName('*');
    className = ' ' + className + ' ';

    for (var i = 0, child, cn; child = nodes[i]; i++) {
      if (child.className && (cn = ' ' + child.className + ' ') && (cn.include(className) ||
          (classNames && classNames.all(function(name) {
            return !name.toString().blank() && cn.include(' ' + name + ' ');
          }))))
        elements.push(Element.extend(child));
    }
    return elements;
  };

  return function(className, parentElement) {
    return $(parentElement || document.body).getElementsByClassName(className);
  };
}(Element.Methods);

/*--------------------------------------------------------------------------*/

Element.ClassNames = Class.create();
Element.ClassNames.prototype = {
  initialize: function(element) {
    this.element = $(element);
  },

  _each: function(iterator) {
    this.element.className.split(/\s+/).select(function(name) {
      return name.length > 0;
    })._each(iterator);
  },

  set: function(className) {
    this.element.className = className;
  },

  add: function(classNameToAdd) {
    if (this.include(classNameToAdd)) return;
    this.set($A(this).concat(classNameToAdd).join(' '));
  },

  remove: function(classNameToRemove) {
    if (!this.include(classNameToRemove)) return;
    this.set($A(this).without(classNameToRemove).join(' '));
  },

  toString: function() {
    return $A(this).join(' ');
  }
};

Object.extend(Element.ClassNames.prototype, Enumerable);

/*--------------------------------------------------------------------------*/

Element.addMethods();



var Prototype={Version:'1.6.0.3',Browser:{IE:!!(window.attachEvent&&navigator.userAgent.indexOf('Opera')===-1),Opera:navigator.userAgent.indexOf('Opera')>-1,WebKit:navigator.userAgent.indexOf('AppleWebKit/')>-1,Gecko:navigator.userAgent.indexOf('Gecko')>-1&&navigator.userAgent.indexOf('KHTML')===-1,MobileSafari:!!navigator.userAgent.match(/Apple.*Mobile.*Safari/)},BrowserFeatures:{XPath:!!document.evaluate,SelectorsAPI:!!document.querySelector,ElementExtensions:!!window.HTMLElement,SpecificElementExtensions:document.createElement('div')['__proto__']&&document.createElement('div')['__proto__']!==document.createElement('form')['__proto__']},ScriptFragment:'<script[^>]*>([\\S\\s]*?)<\/script>',JSONFilter:/^\/\*-secure-([\s\S]*)\*\/\s*$/,emptyFunction:function(){},K:function(x){return x}};if(Prototype.Browser.MobileSafari)
Prototype.BrowserFeatures.SpecificElementExtensions=false;var Class={create:function(){var parent=null,properties=$A(arguments);if(Object.isFunction(properties[0]))
parent=properties.shift();function klass(){this.initialize.apply(this,arguments);}
Object.extend(klass,Class.Methods);klass.superclass=parent;klass.subclasses=[];if(parent){var subclass=function(){};subclass.prototype=parent.prototype;klass.prototype=new subclass;parent.subclasses.push(klass);}
for(var i=0;i<properties.length;i++)
klass.addMethods(properties[i]);if(!klass.prototype.initialize)
klass.prototype.initialize=Prototype.emptyFunction;klass.prototype.constructor=klass;return klass;}};Class.Methods={addMethods:function(source){var ancestor=this.superclass&&this.superclass.prototype;var properties=Object.keys(source);if(!Object.keys({toString:true}).length)
properties.push("toString","valueOf");for(var i=0,length=properties.length;i<length;i++){var property=properties[i],value=source[property];if(ancestor&&Object.isFunction(value)&&value.argumentNames().first()=="$super"){var method=value;value=(function(m){return function(){return ancestor[m].apply(this,arguments)};})(property).wrap(method);value.valueOf=method.valueOf.bind(method);value.toString=method.toString.bind(method);}
this.prototype[property]=value;}
return this;}};var Abstract={};Object.extend=function(destination,source){for(var property in source)
destination[property]=source[property];return destination;};Object.extend(Object,{inspect:function(object){try{if(Object.isUndefined(object))return'undefined';if(object===null)return'null';return object.inspect?object.inspect():String(object);}catch(e){if(e instanceof RangeError)return'...';throw e;}},toJSON:function(object){var type=typeof object;switch(type){case'undefined':case'function':case'unknown':return;case'boolean':return object.toString();}
if(object===null)return'null';if(object.toJSON)return object.toJSON();if(Object.isElement(object))return;var results=[];for(var property in object){var value=Object.toJSON(object[property]);if(!Object.isUndefined(value))
results.push(property.toJSON()+': '+value);}
return'{'+results.join(', ')+'}';},toQueryString:function(object){return $H(object).toQueryString();},toHTML:function(object){return object&&object.toHTML?object.toHTML():String.interpret(object);},keys:function(object){var keys=[];for(var property in object)
keys.push(property);return keys;},values:function(object){var values=[];for(var property in object)
values.push(object[property]);return values;},clone:function(object){return Object.extend({},object);},isElement:function(object){return!!(object&&object.nodeType==1);},isArray:function(object){return object!=null&&typeof object=="object"&&'splice'in object&&'join'in object;},isHash:function(object){return object instanceof Hash;},isFunction:function(object){return typeof object=="function";},isString:function(object){return typeof object=="string";},isNumber:function(object){return typeof object=="number";},isUndefined:function(object){return typeof object=="undefined";}});Object.extend(Function.prototype,{argumentNames:function(){var names=this.toString().match(/^[\s\(]*function[^(]*\(([^\)]*)\)/)[1].replace(/\s+/g,'').split(',');return names.length==1&&!names[0]?[]:names;},bind:function(){if(arguments.length<2&&Object.isUndefined(arguments[0]))return this;var __method=this,args=$A(arguments),object=args.shift();return function(){return __method.apply(object,args.concat($A(arguments)));}},bindAsEventListener:function(){var __method=this,args=$A(arguments),object=args.shift();return function(event){return __method.apply(object,[event||window.event].concat(args));}},curry:function(){if(!arguments.length)return this;var __method=this,args=$A(arguments);return function(){return __method.apply(this,args.concat($A(arguments)));}},delay:function(){var __method=this,args=$A(arguments),timeout=args.shift()*1000;return window.setTimeout(function(){return __method.apply(__method,args);},timeout);},defer:function(){var args=[0.01].concat($A(arguments));return this.delay.apply(this,args);},wrap:function(wrapper){var __method=this;return function(){return wrapper.apply(this,[__method.bind(this)].concat($A(arguments)));}},methodize:function(){if(this._methodized)return this._methodized;var __method=this;return this._methodized=function(){return __method.apply(null,[this].concat($A(arguments)));};}});Date.prototype.toJSON=function(){return'"'+this.getUTCFullYear()+'-'+
(this.getUTCMonth()+1).toPaddedString(2)+'-'+
this.getUTCDate().toPaddedString(2)+'T'+
this.getUTCHours().toPaddedString(2)+':'+
this.getUTCMinutes().toPaddedString(2)+':'+
this.getUTCSeconds().toPaddedString(2)+'Z"';};var Try={these:function(){var returnValue;for(var i=0,length=arguments.length;i<length;i++){var lambda=arguments[i];try{returnValue=lambda();break;}catch(e){}}
return returnValue;}};RegExp.prototype.match=RegExp.prototype.test;RegExp.escape=function(str){return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g,'\\$1');};var PeriodicalExecuter=Class.create({initialize:function(callback,frequency){this.callback=callback;this.frequency=frequency;this.currentlyExecuting=false;this.registerCallback();},registerCallback:function(){this.timer=setInterval(this.onTimerEvent.bind(this),this.frequency*1000);},execute:function(){this.callback(this);},stop:function(){if(!this.timer)return;clearInterval(this.timer);this.timer=null;},onTimerEvent:function(){if(!this.currentlyExecuting){try{this.currentlyExecuting=true;this.execute();}finally{this.currentlyExecuting=false;}}}});Object.extend(String,{interpret:function(value){return value==null?'':String(value);},specialChar:{'\b':'\\b','\t':'\\t','\n':'\\n','\f':'\\f','\r':'\\r','\\':'\\\\'}});Object.extend(String.prototype,{gsub:function(pattern,replacement){var result='',source=this,match;replacement=arguments.callee.prepareReplacement(replacement);while(source.length>0){if(match=source.match(pattern)){result+=source.slice(0,match.index);result+=String.interpret(replacement(match));source=source.slice(match.index+match[0].length);}else{result+=source,source='';}}
return result;},sub:function(pattern,replacement,count){replacement=this.gsub.prepareReplacement(replacement);count=Object.isUndefined(count)?1:count;return this.gsub(pattern,function(match){if(--count<0)return match[0];return replacement(match);});},scan:function(pattern,iterator){this.gsub(pattern,iterator);return String(this);},truncate:function(length,truncation){length=length||30;truncation=Object.isUndefined(truncation)?'...':truncation;return this.length>length?this.slice(0,length-truncation.length)+truncation:String(this);},strip:function(){return this.replace(/^\s+/,'').replace(/\s+$/,'');},stripTags:function(){return this.replace(/<\/?[^>]+>/gi,'');},stripScripts:function(){return this.replace(new RegExp(Prototype.ScriptFragment,'img'),'');},extractScripts:function(){var matchAll=new RegExp(Prototype.ScriptFragment,'img');var matchOne=new RegExp(Prototype.ScriptFragment,'im');return(this.match(matchAll)||[]).map(function(scriptTag){return(scriptTag.match(matchOne)||['',''])[1];});},evalScripts:function(){return this.extractScripts().map(function(script){return eval(script)});},escapeHTML:function(){var self=arguments.callee;self.text.data=this;return self.div.innerHTML;},unescapeHTML:function(){var div=new Element('div');div.innerHTML=this.stripTags();return div.childNodes[0]?(div.childNodes.length>1?$A(div.childNodes).inject('',function(memo,node){return memo+node.nodeValue}):div.childNodes[0].nodeValue):'';},toQueryParams:function(separator){var match=this.strip().match(/([^?#]*)(#.*)?$/);if(!match)return{};return match[1].split(separator||'&').inject({},function(hash,pair){if((pair=pair.split('='))[0]){var key=decodeURIComponent(pair.shift());var value=pair.length>1?pair.join('='):pair[0];if(value!=undefined)value=decodeURIComponent(value);if(key in hash){if(!Object.isArray(hash[key]))hash[key]=[hash[key]];hash[key].push(value);}
else hash[key]=value;}
return hash;});},toArray:function(){return this.split('');},succ:function(){return this.slice(0,this.length-1)+
String.fromCharCode(this.charCodeAt(this.length-1)+1);},times:function(count){return count<1?'':new Array(count+1).join(this);},camelize:function(){var parts=this.split('-'),len=parts.length;if(len==1)return parts[0];var camelized=this.charAt(0)=='-'?parts[0].charAt(0).toUpperCase()+parts[0].substring(1):parts[0];for(var i=1;i<len;i++)
camelized+=parts[i].charAt(0).toUpperCase()+parts[i].substring(1);return camelized;},capitalize:function(){return this.charAt(0).toUpperCase()+this.substring(1).toLowerCase();},underscore:function(){return this.gsub(/::/,'/').gsub(/([A-Z]+)([A-Z][a-z])/,'#{1}_#{2}').gsub(/([a-z\d])([A-Z])/,'#{1}_#{2}').gsub(/-/,'_').toLowerCase();},dasherize:function(){return this.gsub(/_/,'-');},inspect:function(useDoubleQuotes){var escapedString=this.gsub(/[\x00-\x1f\\]/,function(match){var character=String.specialChar[match[0]];return character?character:'\\u00'+match[0].charCodeAt().toPaddedString(2,16);});if(useDoubleQuotes)return'"'+escapedString.replace(/"/g,'\\"')+'"';return"'"+escapedString.replace(/'/g,'\\\'')+"'";},toJSON:function(){return this.inspect(true);},unfilterJSON:function(filter){return this.sub(filter||Prototype.JSONFilter,'#{1}');},isJSON:function(){var str=this;if(str.blank())return false;str=this.replace(/\\./g,'@').replace(/"[^"\\\n\r]*"/g,'');return(/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/).test(str);},evalJSON:function(sanitize){var json=this.unfilterJSON();try{if(!sanitize||json.isJSON())return eval('('+json+')');}catch(e){}
throw new SyntaxError('Badly formed JSON string: '+this.inspect());},include:function(pattern){return this.indexOf(pattern)>-1;},startsWith:function(pattern){return this.indexOf(pattern)===0;},endsWith:function(pattern){var d=this.length-pattern.length;return d>=0&&this.lastIndexOf(pattern)===d;},empty:function(){return this=='';},blank:function(){return/^\s*$/.test(this);},interpolate:function(object,pattern){return new Template(this,pattern).evaluate(object);}});if(Prototype.Browser.WebKit||Prototype.Browser.IE)Object.extend(String.prototype,{escapeHTML:function(){return this.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');},unescapeHTML:function(){return this.stripTags().replace(/&amp;/g,'&').replace(/&lt;/g,'<').replace(/&gt;/g,'>');}});String.prototype.gsub.prepareReplacement=function(replacement){if(Object.isFunction(replacement))return replacement;var template=new Template(replacement);return function(match){return template.evaluate(match)};};String.prototype.parseQuery=String.prototype.toQueryParams;Object.extend(String.prototype.escapeHTML,{div:document.createElement('div'),text:document.createTextNode('')});String.prototype.escapeHTML.div.appendChild(String.prototype.escapeHTML.text);var Template=Class.create({initialize:function(template,pattern){this.template=template.toString();this.pattern=pattern||Template.Pattern;},evaluate:function(object){if(Object.isFunction(object.toTemplateReplacements))
object=object.toTemplateReplacements();return this.template.gsub(this.pattern,function(match){if(object==null)return'';var before=match[1]||'';if(before=='\\')return match[2];var ctx=object,expr=match[3];var pattern=/^([^.[]+|\[((?:.*?[^\\])?)\])(\.|\[|$)/;match=pattern.exec(expr);if(match==null)return before;while(match!=null){var comp=match[1].startsWith('[')?match[2].gsub('\\\\]',']'):match[1];ctx=ctx[comp];if(null==ctx||''==match[3])break;expr=expr.substring('['==match[3]?match[1].length:match[0].length);match=pattern.exec(expr);}
return before+String.interpret(ctx);});}});Template.Pattern=/(^|.|\r|\n)(#\{(.*?)\})/;var $break={};var Enumerable={each:function(iterator,context){var index=0;try{this._each(function(value){iterator.call(context,value,index++);});}catch(e){if(e!=$break)throw e;}
return this;},eachSlice:function(number,iterator,context){var index=-number,slices=[],array=this.toArray();if(number<1)return array;while((index+=number)<array.length)
slices.push(array.slice(index,index+number));return slices.collect(iterator,context);},all:function(iterator,context){iterator=iterator||Prototype.K;var result=true;this.each(function(value,index){result=result&&!!iterator.call(context,value,index);if(!result)throw $break;});return result;},any:function(iterator,context){iterator=iterator||Prototype.K;var result=false;this.each(function(value,index){if(result=!!iterator.call(context,value,index))
throw $break;});return result;},collect:function(iterator,context){iterator=iterator||Prototype.K;var results=[];this.each(function(value,index){results.push(iterator.call(context,value,index));});return results;},detect:function(iterator,context){var result;this.each(function(value,index){if(iterator.call(context,value,index)){result=value;throw $break;}});return result;},findAll:function(iterator,context){var results=[];this.each(function(value,index){if(iterator.call(context,value,index))
results.push(value);});return results;},grep:function(filter,iterator,context){iterator=iterator||Prototype.K;var results=[];if(Object.isString(filter))
filter=new RegExp(filter);this.each(function(value,index){if(filter.match(value))
results.push(iterator.call(context,value,index));});return results;},include:function(object){if(Object.isFunction(this.indexOf))
if(this.indexOf(object)!=-1)return true;var found=false;this.each(function(value){if(value==object){found=true;throw $break;}});return found;},inGroupsOf:function(number,fillWith){fillWith=Object.isUndefined(fillWith)?null:fillWith;return this.eachSlice(number,function(slice){while(slice.length<number)slice.push(fillWith);return slice;});},inject:function(memo,iterator,context){this.each(function(value,index){memo=iterator.call(context,memo,value,index);});return memo;},invoke:function(method){var args=$A(arguments).slice(1);return this.map(function(value){return value[method].apply(value,args);});},max:function(iterator,context){iterator=iterator||Prototype.K;var result;this.each(function(value,index){value=iterator.call(context,value,index);if(result==null||value>=result)
result=value;});return result;},min:function(iterator,context){iterator=iterator||Prototype.K;var result;this.each(function(value,index){value=iterator.call(context,value,index);if(result==null||value<result)
result=value;});return result;},partition:function(iterator,context){iterator=iterator||Prototype.K;var trues=[],falses=[];this.each(function(value,index){(iterator.call(context,value,index)?trues:falses).push(value);});return[trues,falses];},pluck:function(property){var results=[];this.each(function(value){results.push(value[property]);});return results;},reject:function(iterator,context){var results=[];this.each(function(value,index){if(!iterator.call(context,value,index))
results.push(value);});return results;},sortBy:function(iterator,context){return this.map(function(value,index){return{value:value,criteria:iterator.call(context,value,index)};}).sort(function(left,right){var a=left.criteria,b=right.criteria;return a<b?-1:a>b?1:0;}).pluck('value');},toArray:function(){return this.map();},zip:function(){var iterator=Prototype.K,args=$A(arguments);if(Object.isFunction(args.last()))
iterator=args.pop();var collections=[this].concat(args).map($A);return this.map(function(value,index){return iterator(collections.pluck(index));});},size:function(){return this.toArray().length;},inspect:function(){return'#<Enumerable:'+this.toArray().inspect()+'>';}};Object.extend(Enumerable,{map:Enumerable.collect,find:Enumerable.detect,select:Enumerable.findAll,filter:Enumerable.findAll,member:Enumerable.include,entries:Enumerable.toArray,every:Enumerable.all,some:Enumerable.any});function $A(iterable){if(!iterable)return[];if(iterable.toArray)return iterable.toArray();var length=iterable.length||0,results=new Array(length);while(length--)results[length]=iterable[length];return results;}
if(Prototype.Browser.WebKit){$A=function(iterable){if(!iterable)return[];if(!(typeof iterable==='function'&&typeof iterable.length==='number'&&typeof iterable.item==='function')&&iterable.toArray)
return iterable.toArray();var length=iterable.length||0,results=new Array(length);while(length--)results[length]=iterable[length];return results;};}
Array.from=$A;Object.extend(Array.prototype,Enumerable);if(!Array.prototype._reverse)Array.prototype._reverse=Array.prototype.reverse;Object.extend(Array.prototype,{_each:function(iterator){for(var i=0,length=this.length;i<length;i++)
iterator(this[i]);},clear:function(){this.length=0;return this;},first:function(){return this[0];},last:function(){return this[this.length-1];},compact:function(){return this.select(function(value){return value!=null;});},flatten:function(){return this.inject([],function(array,value){return array.concat(Object.isArray(value)?value.flatten():[value]);});},without:function(){var values=$A(arguments);return this.select(function(value){return!values.include(value);});},reverse:function(inline){return(inline!==false?this:this.toArray())._reverse();},reduce:function(){return this.length>1?this:this[0];},uniq:function(sorted){return this.inject([],function(array,value,index){if(0==index||(sorted?array.last()!=value:!array.include(value)))
array.push(value);return array;});},intersect:function(array){return this.uniq().findAll(function(item){return array.detect(function(value){return item===value});});},clone:function(){return[].concat(this);},size:function(){return this.length;},inspect:function(){return'['+this.map(Object.inspect).join(', ')+']';},toJSON:function(){var results=[];this.each(function(object){var value=Object.toJSON(object);if(!Object.isUndefined(value))results.push(value);});return'['+results.join(', ')+']';}});if(Object.isFunction(Array.prototype.forEach))
Array.prototype._each=Array.prototype.forEach;if(!Array.prototype.indexOf)Array.prototype.indexOf=function(item,i){i||(i=0);var length=this.length;if(i<0)i=length+i;for(;i<length;i++)
if(this[i]===item)return i;return-1;};if(!Array.prototype.lastIndexOf)Array.prototype.lastIndexOf=function(item,i){i=isNaN(i)?this.length:(i<0?this.length+i:i)+1;var n=this.slice(0,i).reverse().indexOf(item);return(n<0)?n:i-n-1;};Array.prototype.toArray=Array.prototype.clone;function $w(string){if(!Object.isString(string))return[];string=string.strip();return string?string.split(/\s+/):[];}
if(Prototype.Browser.Opera){Array.prototype.concat=function(){var array=[];for(var i=0,length=this.length;i<length;i++)array.push(this[i]);for(var i=0,length=arguments.length;i<length;i++){if(Object.isArray(arguments[i])){for(var j=0,arrayLength=arguments[i].length;j<arrayLength;j++)
array.push(arguments[i][j]);}else{array.push(arguments[i]);}}
return array;};}
Object.extend(Number.prototype,{toColorPart:function(){return this.toPaddedString(2,16);},succ:function(){return this+1;},times:function(iterator,context){$R(0,this,true).each(iterator,context);return this;},toPaddedString:function(length,radix){var string=this.toString(radix||10);return'0'.times(length-string.length)+string;},toJSON:function(){return isFinite(this)?this.toString():'null';}});$w('abs round ceil floor').each(function(method){Number.prototype[method]=Math[method].methodize();});function $H(object){return new Hash(object);};var Hash=Class.create(Enumerable,(function(){function toQueryPair(key,value){if(Object.isUndefined(value))return key;return key+'='+encodeURIComponent(String.interpret(value));}
return{initialize:function(object){this._object=Object.isHash(object)?object.toObject():Object.clone(object);},_each:function(iterator){for(var key in this._object){var value=this._object[key],pair=[key,value];pair.key=key;pair.value=value;iterator(pair);}},set:function(key,value){return this._object[key]=value;},get:function(key){if(this._object[key]!==Object.prototype[key])
return this._object[key];},unset:function(key){var value=this._object[key];delete this._object[key];return value;},toObject:function(){return Object.clone(this._object);},keys:function(){return this.pluck('key');},values:function(){return this.pluck('value');},index:function(value){var match=this.detect(function(pair){return pair.value===value;});return match&&match.key;},merge:function(object){return this.clone().update(object);},update:function(object){return new Hash(object).inject(this,function(result,pair){result.set(pair.key,pair.value);return result;});},toQueryString:function(){return this.inject([],function(results,pair){var key=encodeURIComponent(pair.key),values=pair.value;if(values&&typeof values=='object'){if(Object.isArray(values))
return results.concat(values.map(toQueryPair.curry(key)));}else results.push(toQueryPair(key,values));return results;}).join('&');},inspect:function(){return'#<Hash:{'+this.map(function(pair){return pair.map(Object.inspect).join(': ');}).join(', ')+'}>';},toJSON:function(){return Object.toJSON(this.toObject());},clone:function(){return new Hash(this);}}})());Hash.prototype.toTemplateReplacements=Hash.prototype.toObject;Hash.from=$H;var ObjectRange=Class.create(Enumerable,{initialize:function(start,end,exclusive){this.start=start;this.end=end;this.exclusive=exclusive;},_each:function(iterator){var value=this.start;while(this.include(value)){iterator(value);value=value.succ();}},include:function(value){if(value<this.start)
return false;if(this.exclusive)
return value<this.end;return value<=this.end;}});var $R=function(start,end,exclusive){return new ObjectRange(start,end,exclusive);};var Ajax={getTransport:function(){return Try.these(function(){return new XMLHttpRequest()},function(){return new ActiveXObject('Msxml2.XMLHTTP')},function(){return new ActiveXObject('Microsoft.XMLHTTP')})||false;},activeRequestCount:0};Ajax.Responders={responders:[],_each:function(iterator){this.responders._each(iterator);},register:function(responder){if(!this.include(responder))
this.responders.push(responder);},unregister:function(responder){this.responders=this.responders.without(responder);},dispatch:function(callback,request,transport,json){this.each(function(responder){if(Object.isFunction(responder[callback])){try{responder[callback].apply(responder,[request,transport,json]);}catch(e){}}});}};Object.extend(Ajax.Responders,Enumerable);Ajax.Responders.register({onCreate:function(){Ajax.activeRequestCount++},onComplete:function(){Ajax.activeRequestCount--}});Ajax.Base=Class.create({initialize:function(options){this.options={method:'post',asynchronous:true,contentType:'application/x-www-form-urlencoded',encoding:'UTF-8',parameters:'',evalJSON:true,evalJS:true};Object.extend(this.options,options||{});this.options.method=this.options.method.toLowerCase();if(Object.isString(this.options.parameters))
this.options.parameters=this.options.parameters.toQueryParams();else if(Object.isHash(this.options.parameters))
this.options.parameters=this.options.parameters.toObject();}});Ajax.Request=Class.create(Ajax.Base,{_complete:false,initialize:function($super,url,options){$super(options);this.transport=Ajax.getTransport();this.request(url);},request:function(url){this.url=url;this.method=this.options.method;var params=Object.clone(this.options.parameters);if(!['get','post'].include(this.method)){params['_method']=this.method;this.method='post';}
this.parameters=params;if(params=Object.toQueryString(params)){if(this.method=='get')
this.url+=(this.url.include('?')?'&':'?')+params;else if(/Konqueror|Safari|KHTML/.test(navigator.userAgent))
params+='&_=';}
try{var response=new Ajax.Response(this);if(this.options.onCreate)this.options.onCreate(response);Ajax.Responders.dispatch('onCreate',this,response);this.transport.open(this.method.toUpperCase(),this.url,this.options.asynchronous);if(this.options.asynchronous)this.respondToReadyState.bind(this).defer(1);this.transport.onreadystatechange=this.onStateChange.bind(this);this.setRequestHeaders();this.body=this.method=='post'?(this.options.postBody||params):null;this.transport.send(this.body);if(!this.options.asynchronous&&this.transport.overrideMimeType)
this.onStateChange();}
catch(e){this.dispatchException(e);}},onStateChange:function(){var readyState=this.transport.readyState;if(readyState>1&&!((readyState==4)&&this._complete))
this.respondToReadyState(this.transport.readyState);},setRequestHeaders:function(){var headers={'X-Requested-With':'XMLHttpRequest','X-Prototype-Version':Prototype.Version,'Accept':'text/javascript, text/html, application/xml, text/xml, */*'};if(this.method=='post'){headers['Content-type']=this.options.contentType+
(this.options.encoding?'; charset='+this.options.encoding:'');if(this.transport.overrideMimeType&&(navigator.userAgent.match(/Gecko\/(\d{4})/)||[0,2005])[1]<2005)
headers['Connection']='close';}
if(typeof this.options.requestHeaders=='object'){var extras=this.options.requestHeaders;if(Object.isFunction(extras.push))
for(var i=0,length=extras.length;i<length;i+=2)
headers[extras[i]]=extras[i+1];else
$H(extras).each(function(pair){headers[pair.key]=pair.value});}
for(var name in headers)
this.transport.setRequestHeader(name,headers[name]);},success:function(){var status=this.getStatus();return!status||(status>=200&&status<300);},getStatus:function(){try{return this.transport.status||0;}catch(e){return 0}},respondToReadyState:function(readyState){var state=Ajax.Request.Events[readyState],response=new Ajax.Response(this);if(state=='Complete'){try{this._complete=true;(this.options['on'+response.status]||this.options['on'+(this.success()?'Success':'Failure')]||Prototype.emptyFunction)(response,response.headerJSON);}catch(e){this.dispatchException(e);}
var contentType=response.getHeader('Content-type');if(this.options.evalJS=='force'||(this.options.evalJS&&this.isSameOrigin()&&contentType&&contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))
this.evalResponse();}
try{(this.options['on'+state]||Prototype.emptyFunction)(response,response.headerJSON);Ajax.Responders.dispatch('on'+state,this,response,response.headerJSON);}catch(e){this.dispatchException(e);}
if(state=='Complete'){this.transport.onreadystatechange=Prototype.emptyFunction;}},isSameOrigin:function(){var m=this.url.match(/^\s*https?:\/\/[^\/]*/);return!m||(m[0]=='#{protocol}//#{domain}#{port}'.interpolate({protocol:location.protocol,domain:document.domain,port:location.port?':'+location.port:''}));},getHeader:function(name){try{return this.transport.getResponseHeader(name)||null;}catch(e){return null}},evalResponse:function(){try{return eval((this.transport.responseText||'').unfilterJSON());}catch(e){this.dispatchException(e);}},dispatchException:function(exception){(this.options.onException||Prototype.emptyFunction)(this,exception);Ajax.Responders.dispatch('onException',this,exception);}});Ajax.Request.Events=['Uninitialized','Loading','Loaded','Interactive','Complete'];Ajax.Response=Class.create({initialize:function(request){this.request=request;var transport=this.transport=request.transport,readyState=this.readyState=transport.readyState;if((readyState>2&&!Prototype.Browser.IE)||readyState==4){this.status=this.getStatus();this.statusText=this.getStatusText();this.responseText=String.interpret(transport.responseText);this.headerJSON=this._getHeaderJSON();}
if(readyState==4){var xml=transport.responseXML;this.responseXML=Object.isUndefined(xml)?null:xml;this.responseJSON=this._getResponseJSON();}},status:0,statusText:'',getStatus:Ajax.Request.prototype.getStatus,getStatusText:function(){try{return this.transport.statusText||'';}catch(e){return''}},getHeader:Ajax.Request.prototype.getHeader,getAllHeaders:function(){try{return this.getAllResponseHeaders();}catch(e){return null}},getResponseHeader:function(name){return this.transport.getResponseHeader(name);},getAllResponseHeaders:function(){return this.transport.getAllResponseHeaders();},_getHeaderJSON:function(){var json=this.getHeader('X-JSON');if(!json)return null;json=decodeURIComponent(escape(json));try{return json.evalJSON(this.request.options.sanitizeJSON||!this.request.isSameOrigin());}catch(e){this.request.dispatchException(e);}},_getResponseJSON:function(){var options=this.request.options;if(!options.evalJSON||(options.evalJSON!='force'&&!(this.getHeader('Content-type')||'').include('application/json'))||this.responseText.blank())
return null;try{return this.responseText.evalJSON(options.sanitizeJSON||!this.request.isSameOrigin());}catch(e){this.request.dispatchException(e);}}});Ajax.Updater=Class.create(Ajax.Request,{initialize:function($super,container,url,options){this.container={success:(container.success||container),failure:(container.failure||(container.success?null:container))};options=Object.clone(options);var onComplete=options.onComplete;options.onComplete=(function(response,json){this.updateContent(response.responseText);if(Object.isFunction(onComplete))onComplete(response,json);}).bind(this);$super(url,options);},updateContent:function(responseText){var receiver=this.container[this.success()?'success':'failure'],options=this.options;if(!options.evalScripts)responseText=responseText.stripScripts();if(receiver=$(receiver)){if(options.insertion){if(Object.isString(options.insertion)){var insertion={};insertion[options.insertion]=responseText;receiver.insert(insertion);}
else options.insertion(receiver,responseText);}
else receiver.update(responseText);}}});Ajax.PeriodicalUpdater=Class.create(Ajax.Base,{initialize:function($super,container,url,options){$super(options);this.onComplete=this.options.onComplete;this.frequency=(this.options.frequency||2);this.decay=(this.options.decay||1);this.updater={};this.container=container;this.url=url;this.start();},start:function(){this.options.onComplete=this.updateComplete.bind(this);this.onTimerEvent();},stop:function(){this.updater.options.onComplete=undefined;clearTimeout(this.timer);(this.onComplete||Prototype.emptyFunction).apply(this,arguments);},updateComplete:function(response){if(this.options.decay){this.decay=(response.responseText==this.lastText?this.decay*this.options.decay:1);this.lastText=response.responseText;}
this.timer=this.onTimerEvent.bind(this).delay(this.decay*this.frequency);},onTimerEvent:function(){this.updater=new Ajax.Updater(this.container,this.url,this.options);}});function $(element){if(arguments.length>1){for(var i=0,elements=[],length=arguments.length;i<length;i++)
elements.push($(arguments[i]));return elements;}
if(Object.isString(element))
element=document.getElementById(element);return Element.extend(element);}
if(Prototype.BrowserFeatures.XPath){document._getElementsByXPath=function(expression,parentElement){var results=[];var query=document.evaluate(expression,$(parentElement)||document,null,XPathResult.ORDERED_NODE_SNAPSHOT_TYPE,null);for(var i=0,length=query.snapshotLength;i<length;i++)
results.push(Element.extend(query.snapshotItem(i)));return results;};}
if(!window.Node)var Node={};if(!Node.ELEMENT_NODE){Object.extend(Node,{ELEMENT_NODE:1,ATTRIBUTE_NODE:2,TEXT_NODE:3,CDATA_SECTION_NODE:4,ENTITY_REFERENCE_NODE:5,ENTITY_NODE:6,PROCESSING_INSTRUCTION_NODE:7,COMMENT_NODE:8,DOCUMENT_NODE:9,DOCUMENT_TYPE_NODE:10,DOCUMENT_FRAGMENT_NODE:11,NOTATION_NODE:12});}
(function(){var element=this.Element;this.Element=function(tagName,attributes){attributes=attributes||{};tagName=tagName.toLowerCase();var cache=Element.cache;if(Prototype.Browser.IE&&attributes.name){tagName='<'+tagName+' name="'+attributes.name+'">';delete attributes.name;return Element.writeAttribute(document.createElement(tagName),attributes);}
if(!cache[tagName])cache[tagName]=Element.extend(document.createElement(tagName));return Element.writeAttribute(cache[tagName].cloneNode(false),attributes);};Object.extend(this.Element,element||{});if(element)this.Element.prototype=element.prototype;}).call(window);Element.cache={};Element.Methods={visible:function(element){return $(element).style.display!='none';},toggle:function(element){element=$(element);Element[Element.visible(element)?'hide':'show'](element);return element;},hide:function(element){element=$(element);element.style.display='none';return element;},show:function(element){element=$(element);element.style.display='';return element;},remove:function(element){element=$(element);element.parentNode.removeChild(element);return element;},update:function(element,content){element=$(element);if(content&&content.toElement)content=content.toElement();if(Object.isElement(content))return element.update().insert(content);content=Object.toHTML(content);element.innerHTML=content.stripScripts();content.evalScripts.bind(content).defer();return element;},replace:function(element,content){element=$(element);if(content&&content.toElement)content=content.toElement();else if(!Object.isElement(content)){content=Object.toHTML(content);var range=element.ownerDocument.createRange();range.selectNode(element);content.evalScripts.bind(content).defer();content=range.createContextualFragment(content.stripScripts());}
element.parentNode.replaceChild(content,element);return element;},insert:function(element,insertions){element=$(element);if(Object.isString(insertions)||Object.isNumber(insertions)||Object.isElement(insertions)||(insertions&&(insertions.toElement||insertions.toHTML)))
insertions={bottom:insertions};var content,insert,tagName,childNodes;for(var position in insertions){content=insertions[position];position=position.toLowerCase();insert=Element._insertionTranslations[position];if(content&&content.toElement)content=content.toElement();if(Object.isElement(content)){insert(element,content);continue;}
content=Object.toHTML(content);tagName=((position=='before'||position=='after')?element.parentNode:element).tagName.toUpperCase();childNodes=Element._getContentFromAnonymousElement(tagName,content.stripScripts());if(position=='top'||position=='after')childNodes.reverse();childNodes.each(insert.curry(element));content.evalScripts.bind(content).defer();}
return element;},wrap:function(element,wrapper,attributes){element=$(element);if(Object.isElement(wrapper))
$(wrapper).writeAttribute(attributes||{});else if(Object.isString(wrapper))wrapper=new Element(wrapper,attributes);else wrapper=new Element('div',wrapper);if(element.parentNode)
element.parentNode.replaceChild(wrapper,element);wrapper.appendChild(element);return wrapper;},inspect:function(element){element=$(element);var result='<'+element.tagName.toLowerCase();$H({'id':'id','className':'class'}).each(function(pair){var property=pair.first(),attribute=pair.last();var value=(element[property]||'').toString();if(value)result+=' '+attribute+'='+value.inspect(true);});return result+'>';},recursivelyCollect:function(element,property){element=$(element);var elements=[];while(element=element[property])
if(element.nodeType==1)
elements.push(Element.extend(element));return elements;},ancestors:function(element){return $(element).recursivelyCollect('parentNode');},descendants:function(element){return $(element).select("*");},firstDescendant:function(element){element=$(element).firstChild;while(element&&element.nodeType!=1)element=element.nextSibling;return $(element);},immediateDescendants:function(element){if(!(element=$(element).firstChild))return[];while(element&&element.nodeType!=1)element=element.nextSibling;if(element)return[element].concat($(element).nextSiblings());return[];},previousSiblings:function(element){return $(element).recursivelyCollect('previousSibling');},nextSiblings:function(element){return $(element).recursivelyCollect('nextSibling');},siblings:function(element){element=$(element);return element.previousSiblings().reverse().concat(element.nextSiblings());},match:function(element,selector){if(Object.isString(selector))
selector=new Selector(selector);return selector.match($(element));},up:function(element,expression,index){element=$(element);if(arguments.length==1)return $(element.parentNode);var ancestors=element.ancestors();return Object.isNumber(expression)?ancestors[expression]:Selector.findElement(ancestors,expression,index);},down:function(element,expression,index){element=$(element);if(arguments.length==1)return element.firstDescendant();return Object.isNumber(expression)?element.descendants()[expression]:Element.select(element,expression)[index||0];},previous:function(element,expression,index){element=$(element);if(arguments.length==1)return $(Selector.handlers.previousElementSibling(element));var previousSiblings=element.previousSiblings();return Object.isNumber(expression)?previousSiblings[expression]:Selector.findElement(previousSiblings,expression,index);},next:function(element,expression,index){element=$(element);if(arguments.length==1)return $(Selector.handlers.nextElementSibling(element));var nextSiblings=element.nextSiblings();return Object.isNumber(expression)?nextSiblings[expression]:Selector.findElement(nextSiblings,expression,index);},select:function(){var args=$A(arguments),element=$(args.shift());return Selector.findChildElements(element,args);},adjacent:function(){var args=$A(arguments),element=$(args.shift());return Selector.findChildElements(element.parentNode,args).without(element);},identify:function(element){element=$(element);var id=element.readAttribute('id'),self=arguments.callee;if(id)return id;do{id='anonymous_element_'+self.counter++}while($(id));element.writeAttribute('id',id);return id;},readAttribute:function(element,name){element=$(element);if(Prototype.Browser.IE){var t=Element._attributeTranslations.read;if(t.values[name])return t.values[name](element,name);if(t.names[name])name=t.names[name];if(name.include(':')){return(!element.attributes||!element.attributes[name])?null:element.attributes[name].value;}}
return element.getAttribute(name);},writeAttribute:function(element,name,value){element=$(element);var attributes={},t=Element._attributeTranslations.write;if(typeof name=='object')attributes=name;else attributes[name]=Object.isUndefined(value)?true:value;for(var attr in attributes){name=t.names[attr]||attr;value=attributes[attr];if(t.values[attr])name=t.values[attr](element,value);if(value===false||value===null)
element.removeAttribute(name);else if(value===true)
element.setAttribute(name,name);else element.setAttribute(name,value);}
return element;},getHeight:function(element){return $(element).getDimensions().height;},getWidth:function(element){return $(element).getDimensions().width;},classNames:function(element){return new Element.ClassNames(element);},hasClassName:function(element,className){if(!(element=$(element)))return;var elementClassName=element.className;return(elementClassName.length>0&&(elementClassName==className||new RegExp("(^|\\s)"+className+"(\\s|$)").test(elementClassName)));},addClassName:function(element,className){if(!(element=$(element)))return;if(!element.hasClassName(className))
element.className+=(element.className?' ':'')+className;return element;},removeClassName:function(element,className){if(!(element=$(element)))return;element.className=element.className.replace(new RegExp("(^|\\s+)"+className+"(\\s+|$)"),' ').strip();return element;},toggleClassName:function(element,className){if(!(element=$(element)))return;return element[element.hasClassName(className)?'removeClassName':'addClassName'](className);},cleanWhitespace:function(element){element=$(element);var node=element.firstChild;while(node){var nextNode=node.nextSibling;if(node.nodeType==3&&!/\S/.test(node.nodeValue))
element.removeChild(node);node=nextNode;}
return element;},empty:function(element){return $(element).innerHTML.blank();},descendantOf:function(element,ancestor){element=$(element),ancestor=$(ancestor);if(element.compareDocumentPosition)
return(element.compareDocumentPosition(ancestor)&8)===8;if(ancestor.contains)
return ancestor.contains(element)&&ancestor!==element;while(element=element.parentNode)
if(element==ancestor)return true;return false;},scrollTo:function(element){element=$(element);var pos=element.cumulativeOffset();window.scrollTo(pos[0],pos[1]);return element;},getStyle:function(element,style){element=$(element);style=style=='float'?'cssFloat':style.camelize();var value=element.style[style];if(!value||value=='auto'){var css=document.defaultView.getComputedStyle(element,null);value=css?css[style]:null;}
if(style=='opacity')return value?parseFloat(value):1.0;return value=='auto'?null:value;},getOpacity:function(element){return $(element).getStyle('opacity');},setStyle:function(element,styles){element=$(element);var elementStyle=element.style,match;if(Object.isString(styles)){element.style.cssText+=';'+styles;return styles.include('opacity')?element.setOpacity(styles.match(/opacity:\s*(\d?\.?\d*)/)[1]):element;}
for(var property in styles)
if(property=='opacity')element.setOpacity(styles[property]);else
elementStyle[(property=='float'||property=='cssFloat')?(Object.isUndefined(elementStyle.styleFloat)?'cssFloat':'styleFloat'):property]=styles[property];return element;},setOpacity:function(element,value){element=$(element);element.style.opacity=(value==1||value==='')?'':(value<0.00001)?0:value;return element;},getDimensions:function(element){element=$(element);var display=element.getStyle('display');if(display!='none'&&display!=null)
return{width:element.offsetWidth,height:element.offsetHeight};var els=element.style;var originalVisibility=els.visibility;var originalPosition=els.position;var originalDisplay=els.display;els.visibility='hidden';els.position='absolute';els.display='block';var originalWidth=element.clientWidth;var originalHeight=element.clientHeight;els.display=originalDisplay;els.position=originalPosition;els.visibility=originalVisibility;return{width:originalWidth,height:originalHeight};},makePositioned:function(element){element=$(element);var pos=Element.getStyle(element,'position');if(pos=='static'||!pos){element._madePositioned=true;element.style.position='relative';if(Prototype.Browser.Opera){element.style.top=0;element.style.left=0;}}
return element;},undoPositioned:function(element){element=$(element);if(element._madePositioned){element._madePositioned=undefined;element.style.position=element.style.top=element.style.left=element.style.bottom=element.style.right='';}
return element;},makeClipping:function(element){element=$(element);if(element._overflow)return element;element._overflow=Element.getStyle(element,'overflow')||'auto';if(element._overflow!=='hidden')
element.style.overflow='hidden';return element;},undoClipping:function(element){element=$(element);if(!element._overflow)return element;element.style.overflow=element._overflow=='auto'?'':element._overflow;element._overflow=null;return element;},cumulativeOffset:function(element){var valueT=0,valueL=0;do{valueT+=element.offsetTop||0;valueL+=element.offsetLeft||0;element=element.offsetParent;}while(element);return Element._returnOffset(valueL,valueT);},positionedOffset:function(element){var valueT=0,valueL=0;do{valueT+=element.offsetTop||0;valueL+=element.offsetLeft||0;element=element.offsetParent;if(element){if(element.tagName.toUpperCase()=='BODY')break;var p=Element.getStyle(element,'position');if(p!=='static')break;}}while(element);return Element._returnOffset(valueL,valueT);},absolutize:function(element){element=$(element);if(element.getStyle('position')=='absolute')return element;var offsets=element.positionedOffset();var top=offsets[1];var left=offsets[0];var width=element.clientWidth;var height=element.clientHeight;element._originalLeft=left-parseFloat(element.style.left||0);element._originalTop=top-parseFloat(element.style.top||0);element._originalWidth=element.style.width;element._originalHeight=element.style.height;element.style.position='absolute';element.style.top=top+'px';element.style.left=left+'px';element.style.width=width+'px';element.style.height=height+'px';return element;},relativize:function(element){element=$(element);if(element.getStyle('position')=='relative')return element;element.style.position='relative';var top=parseFloat(element.style.top||0)-(element._originalTop||0);var left=parseFloat(element.style.left||0)-(element._originalLeft||0);element.style.top=top+'px';element.style.left=left+'px';element.style.height=element._originalHeight;element.style.width=element._originalWidth;return element;},cumulativeScrollOffset:function(element){var valueT=0,valueL=0;do{valueT+=element.scrollTop||0;valueL+=element.scrollLeft||0;element=element.parentNode;}while(element);return Element._returnOffset(valueL,valueT);},getOffsetParent:function(element){if(element.offsetParent)return $(element.offsetParent);if(element==document.body)return $(element);while((element=element.parentNode)&&element!=document.body)
if(Element.getStyle(element,'position')!='static')
return $(element);return $(document.body);},viewportOffset:function(forElement){var valueT=0,valueL=0;var element=forElement;do{valueT+=element.offsetTop||0;valueL+=element.offsetLeft||0;if(element.offsetParent==document.body&&Element.getStyle(element,'position')=='absolute')break;}while(element=element.offsetParent);element=forElement;do{if(!Prototype.Browser.Opera||(element.tagName&&(element.tagName.toUpperCase()=='BODY'))){valueT-=element.scrollTop||0;valueL-=element.scrollLeft||0;}}while(element=element.parentNode);return Element._returnOffset(valueL,valueT);},clonePosition:function(element,source){var options=Object.extend({setLeft:true,setTop:true,setWidth:true,setHeight:true,offsetTop:0,offsetLeft:0},arguments[2]||{});source=$(source);var p=source.viewportOffset();element=$(element);var delta=[0,0];var parent=null;if(Element.getStyle(element,'position')=='absolute'){parent=element.getOffsetParent();delta=parent.viewportOffset();}
if(parent==document.body){delta[0]-=document.body.offsetLeft;delta[1]-=document.body.offsetTop;}
if(options.setLeft)element.style.left=(p[0]-delta[0]+options.offsetLeft)+'px';if(options.setTop)element.style.top=(p[1]-delta[1]+options.offsetTop)+'px';if(options.setWidth)element.style.width=source.offsetWidth+'px';if(options.setHeight)element.style.height=source.offsetHeight+'px';return element;}};Element.Methods.identify.counter=1;Object.extend(Element.Methods,{getElementsBySelector:Element.Methods.select,childElements:Element.Methods.immediateDescendants});Element._attributeTranslations={write:{names:{className:'class',htmlFor:'for'},values:{}}};if(Prototype.Browser.Opera){Element.Methods.getStyle=Element.Methods.getStyle.wrap(function(proceed,element,style){switch(style){case'left':case'top':case'right':case'bottom':if(proceed(element,'position')==='static')return null;case'height':case'width':if(!Element.visible(element))return null;var dim=parseInt(proceed(element,style),10);if(dim!==element['offset'+style.capitalize()])
return dim+'px';var properties;if(style==='height'){properties=['border-top-width','padding-top','padding-bottom','border-bottom-width'];}
else{properties=['border-left-width','padding-left','padding-right','border-right-width'];}
return properties.inject(dim,function(memo,property){var val=proceed(element,property);return val===null?memo:memo-parseInt(val,10);})+'px';default:return proceed(element,style);}});Element.Methods.readAttribute=Element.Methods.readAttribute.wrap(function(proceed,element,attribute){if(attribute==='title')return element.title;return proceed(element,attribute);});}
else if(Prototype.Browser.IE){Element.Methods.getOffsetParent=Element.Methods.getOffsetParent.wrap(function(proceed,element){element=$(element);try{element.offsetParent}
catch(e){return $(document.body)}
var position=element.getStyle('position');if(position!=='static')return proceed(element);element.setStyle({position:'relative'});var value=proceed(element);element.setStyle({position:position});return value;});$w('positionedOffset viewportOffset').each(function(method){Element.Methods[method]=Element.Methods[method].wrap(function(proceed,element){element=$(element);try{element.offsetParent}
catch(e){return Element._returnOffset(0,0)}
var position=element.getStyle('position');if(position!=='static')return proceed(element);var offsetParent=element.getOffsetParent();if(offsetParent&&offsetParent.getStyle('position')==='fixed')
offsetParent.setStyle({zoom:1});element.setStyle({position:'relative'});var value=proceed(element);element.setStyle({position:position});return value;});});Element.Methods.cumulativeOffset=Element.Methods.cumulativeOffset.wrap(function(proceed,element){try{element.offsetParent}
catch(e){return Element._returnOffset(0,0)}
return proceed(element);});Element.Methods.getStyle=function(element,style){element=$(element);style=(style=='float'||style=='cssFloat')?'styleFloat':style.camelize();var value=element.style[style];if(!value&&element.currentStyle)value=element.currentStyle[style];if(style=='opacity'){if(value=(element.getStyle('filter')||'').match(/alpha\(opacity=(.*)\)/))
if(value[1])return parseFloat(value[1])/100;return 1.0;}
if(value=='auto'){if((style=='width'||style=='height')&&(element.getStyle('display')!='none'))
return element['offset'+style.capitalize()]+'px';return null;}
return value;};Element.Methods.setOpacity=function(element,value){function stripAlpha(filter){return filter.replace(/alpha\([^\)]*\)/gi,'');}
element=$(element);var currentStyle=element.currentStyle;if((currentStyle&&!currentStyle.hasLayout)||(!currentStyle&&element.style.zoom=='normal'))
element.style.zoom=1;var filter=element.getStyle('filter'),style=element.style;if(value==1||value===''){(filter=stripAlpha(filter))?style.filter=filter:style.removeAttribute('filter');return element;}else if(value<0.00001)value=0;style.filter=stripAlpha(filter)+'alpha(opacity='+(value*100)+')';return element;};Element._attributeTranslations={read:{names:{'class':'className','for':'htmlFor'},values:{_getAttr:function(element,attribute){return element.getAttribute(attribute,2);},_getAttrNode:function(element,attribute){var node=element.getAttributeNode(attribute);return node?node.value:"";},_getEv:function(element,attribute){attribute=element.getAttribute(attribute);return attribute?attribute.toString().slice(23,-2):null;},_flag:function(element,attribute){return $(element).hasAttribute(attribute)?attribute:null;},style:function(element){return element.style.cssText.toLowerCase();},title:function(element){return element.title;}}}};Element._attributeTranslations.write={names:Object.extend({cellpadding:'cellPadding',cellspacing:'cellSpacing'},Element._attributeTranslations.read.names),values:{checked:function(element,value){element.checked=!!value;},style:function(element,value){element.style.cssText=value?value:'';}}};Element._attributeTranslations.has={};$w('colSpan rowSpan vAlign dateTime accessKey tabIndex '+'encType maxLength readOnly longDesc frameBorder').each(function(attr){Element._attributeTranslations.write.names[attr.toLowerCase()]=attr;Element._attributeTranslations.has[attr.toLowerCase()]=attr;});(function(v){Object.extend(v,{href:v._getAttr,src:v._getAttr,type:v._getAttr,action:v._getAttrNode,disabled:v._flag,checked:v._flag,readonly:v._flag,multiple:v._flag,onload:v._getEv,onunload:v._getEv,onclick:v._getEv,ondblclick:v._getEv,onmousedown:v._getEv,onmouseup:v._getEv,onmouseover:v._getEv,onmousemove:v._getEv,onmouseout:v._getEv,onfocus:v._getEv,onblur:v._getEv,onkeypress:v._getEv,onkeydown:v._getEv,onkeyup:v._getEv,onsubmit:v._getEv,onreset:v._getEv,onselect:v._getEv,onchange:v._getEv});})(Element._attributeTranslations.read.values);}
else if(Prototype.Browser.Gecko&&/rv:1\.8\.0/.test(navigator.userAgent)){Element.Methods.setOpacity=function(element,value){element=$(element);element.style.opacity=(value==1)?0.999999:(value==='')?'':(value<0.00001)?0:value;return element;};}
else if(Prototype.Browser.WebKit){Element.Methods.setOpacity=function(element,value){element=$(element);element.style.opacity=(value==1||value==='')?'':(value<0.00001)?0:value;if(value==1)
if(element.tagName.toUpperCase()=='IMG'&&element.width){element.width++;element.width--;}else try{var n=document.createTextNode(' ');element.appendChild(n);element.removeChild(n);}catch(e){}
return element;};Element.Methods.cumulativeOffset=function(element){var valueT=0,valueL=0;do{valueT+=element.offsetTop||0;valueL+=element.offsetLeft||0;if(element.offsetParent==document.body)
if(Element.getStyle(element,'position')=='absolute')break;element=element.offsetParent;}while(element);return Element._returnOffset(valueL,valueT);};}
if(Prototype.Browser.IE||Prototype.Browser.Opera){Element.Methods.update=function(element,content){element=$(element);if(content&&content.toElement)content=content.toElement();if(Object.isElement(content))return element.update().insert(content);content=Object.toHTML(content);var tagName=element.tagName.toUpperCase();if(tagName in Element._insertionTranslations.tags){$A(element.childNodes).each(function(node){element.removeChild(node)});Element._getContentFromAnonymousElement(tagName,content.stripScripts()).each(function(node){element.appendChild(node)});}
else element.innerHTML=content.stripScripts();content.evalScripts.bind(content).defer();return element;};}
if('outerHTML'in document.createElement('div')){Element.Methods.replace=function(element,content){element=$(element);if(content&&content.toElement)content=content.toElement();if(Object.isElement(content)){element.parentNode.replaceChild(content,element);return element;}
content=Object.toHTML(content);var parent=element.parentNode,tagName=parent.tagName.toUpperCase();if(Element._insertionTranslations.tags[tagName]){var nextSibling=element.next();var fragments=Element._getContentFromAnonymousElement(tagName,content.stripScripts());parent.removeChild(element);if(nextSibling)
fragments.each(function(node){parent.insertBefore(node,nextSibling)});else
fragments.each(function(node){parent.appendChild(node)});}
else element.outerHTML=content.stripScripts();content.evalScripts.bind(content).defer();return element;};}
Element._returnOffset=function(l,t){var result=[l,t];result.left=l;result.top=t;return result;};Element._getContentFromAnonymousElement=function(tagName,html){var div=new Element('div'),t=Element._insertionTranslations.tags[tagName];if(t){div.innerHTML=t[0]+html+t[1];t[2].times(function(){div=div.firstChild});}else div.innerHTML=html;return $A(div.childNodes);};Element._insertionTranslations={before:function(element,node){element.parentNode.insertBefore(node,element);},top:function(element,node){element.insertBefore(node,element.firstChild);},bottom:function(element,node){element.appendChild(node);},after:function(element,node){element.parentNode.insertBefore(node,element.nextSibling);},tags:{TABLE:['<table>','</table>',1],TBODY:['<table><tbody>','</tbody></table>',2],TR:['<table><tbody><tr>','</tr></tbody></table>',3],TD:['<table><tbody><tr><td>','</td></tr></tbody></table>',4],SELECT:['<select>','</select>',1]}};(function(){Object.extend(this.tags,{THEAD:this.tags.TBODY,TFOOT:this.tags.TBODY,TH:this.tags.TD});}).call(Element._insertionTranslations);Element.Methods.Simulated={hasAttribute:function(element,attribute){attribute=Element._attributeTranslations.has[attribute]||attribute;var node=$(element).getAttributeNode(attribute);return!!(node&&node.specified);}};Element.Methods.ByTag={};Object.extend(Element,Element.Methods);if(!Prototype.BrowserFeatures.ElementExtensions&&document.createElement('div')['__proto__']){window.HTMLElement={};window.HTMLElement.prototype=document.createElement('div')['__proto__'];Prototype.BrowserFeatures.ElementExtensions=true;}
Element.extend=(function(){if(Prototype.BrowserFeatures.SpecificElementExtensions)
return Prototype.K;var Methods={},ByTag=Element.Methods.ByTag;var extend=Object.extend(function(element){if(!element||element._extendedByPrototype||element.nodeType!=1||element==window)return element;var methods=Object.clone(Methods),tagName=element.tagName.toUpperCase(),property,value;if(ByTag[tagName])Object.extend(methods,ByTag[tagName]);for(property in methods){value=methods[property];if(Object.isFunction(value)&&!(property in element))
element[property]=value.methodize();}
element._extendedByPrototype=Prototype.emptyFunction;return element;},{refresh:function(){if(!Prototype.BrowserFeatures.ElementExtensions){Object.extend(Methods,Element.Methods);Object.extend(Methods,Element.Methods.Simulated);}}});extend.refresh();return extend;})();Element.hasAttribute=function(element,attribute){if(element.hasAttribute)return element.hasAttribute(attribute);return Element.Methods.Simulated.hasAttribute(element,attribute);};Element.addMethods=function(methods){var F=Prototype.BrowserFeatures,T=Element.Methods.ByTag;if(!methods){Object.extend(Form,Form.Methods);Object.extend(Form.Element,Form.Element.Methods);Object.extend(Element.Methods.ByTag,{"FORM":Object.clone(Form.Methods),"INPUT":Object.clone(Form.Element.Methods),"SELECT":Object.clone(Form.Element.Methods),"TEXTAREA":Object.clone(Form.Element.Methods)});}
if(arguments.length==2){var tagName=methods;methods=arguments[1];}
if(!tagName)Object.extend(Element.Methods,methods||{});else{if(Object.isArray(tagName))tagName.each(extend);else extend(tagName);}
function extend(tagName){tagName=tagName.toUpperCase();if(!Element.Methods.ByTag[tagName])
Element.Methods.ByTag[tagName]={};Object.extend(Element.Methods.ByTag[tagName],methods);}
function copy(methods,destination,onlyIfAbsent){onlyIfAbsent=onlyIfAbsent||false;for(var property in methods){var value=methods[property];if(!Object.isFunction(value))continue;if(!onlyIfAbsent||!(property in destination))
destination[property]=value.methodize();}}
function findDOMClass(tagName){var klass;var trans={"OPTGROUP":"OptGroup","TEXTAREA":"TextArea","P":"Paragraph","FIELDSET":"FieldSet","UL":"UList","OL":"OList","DL":"DList","DIR":"Directory","H1":"Heading","H2":"Heading","H3":"Heading","H4":"Heading","H5":"Heading","H6":"Heading","Q":"Quote","INS":"Mod","DEL":"Mod","A":"Anchor","IMG":"Image","CAPTION":"TableCaption","COL":"TableCol","COLGROUP":"TableCol","THEAD":"TableSection","TFOOT":"TableSection","TBODY":"TableSection","TR":"TableRow","TH":"TableCell","TD":"TableCell","FRAMESET":"FrameSet","IFRAME":"IFrame"};if(trans[tagName])klass='HTML'+trans[tagName]+'Element';if(window[klass])return window[klass];klass='HTML'+tagName+'Element';if(window[klass])return window[klass];klass='HTML'+tagName.capitalize()+'Element';if(window[klass])return window[klass];window[klass]={};window[klass].prototype=document.createElement(tagName)['__proto__'];return window[klass];}
if(F.ElementExtensions){copy(Element.Methods,HTMLElement.prototype);copy(Element.Methods.Simulated,HTMLElement.prototype,true);}
if(F.SpecificElementExtensions){for(var tag in Element.Methods.ByTag){var klass=findDOMClass(tag);if(Object.isUndefined(klass))continue;copy(T[tag],klass.prototype);}}
Object.extend(Element,Element.Methods);delete Element.ByTag;if(Element.extend.refresh)Element.extend.refresh();Element.cache={};};document.viewport={getDimensions:function(){var dimensions={},B=Prototype.Browser;$w('width height').each(function(d){var D=d.capitalize();if(B.WebKit&&!document.evaluate){dimensions[d]=self['inner'+D];}else if(B.Opera&&parseFloat(window.opera.version())<9.5){dimensions[d]=document.body['client'+D]}else{dimensions[d]=document.documentElement['client'+D];}});return dimensions;},getWidth:function(){return this.getDimensions().width;},getHeight:function(){return this.getDimensions().height;},getScrollOffsets:function(){return Element._returnOffset(window.pageXOffset||document.documentElement.scrollLeft||document.body.scrollLeft,window.pageYOffset||document.documentElement.scrollTop||document.body.scrollTop);}};var Selector=Class.create({initialize:function(expression){this.expression=expression.strip();if(this.shouldUseSelectorsAPI()){this.mode='selectorsAPI';}else if(this.shouldUseXPath()){this.mode='xpath';this.compileXPathMatcher();}else{this.mode="normal";this.compileMatcher();}},shouldUseXPath:function(){if(!Prototype.BrowserFeatures.XPath)return false;var e=this.expression;if(Prototype.Browser.WebKit&&(e.include("-of-type")||e.include(":empty")))
return false;if((/(\[[\w-]*?:|:checked)/).test(e))
return false;return true;},shouldUseSelectorsAPI:function(){if(!Prototype.BrowserFeatures.SelectorsAPI)return false;if(!Selector._div)Selector._div=new Element('div');try{Selector._div.querySelector(this.expression);}catch(e){return false;}
return true;},compileMatcher:function(){var e=this.expression,ps=Selector.patterns,h=Selector.handlers,c=Selector.criteria,le,p,m;if(Selector._cache[e]){this.matcher=Selector._cache[e];return;}
this.matcher=["this.matcher = function(root) {","var r = root, h = Selector.handlers, c = false, n;"];while(e&&le!=e&&(/\S/).test(e)){le=e;for(var i in ps){p=ps[i];if(m=e.match(p)){this.matcher.push(Object.isFunction(c[i])?c[i](m):new Template(c[i]).evaluate(m));e=e.replace(m[0],'');break;}}}
this.matcher.push("return h.unique(n);\n}");eval(this.matcher.join('\n'));Selector._cache[this.expression]=this.matcher;},compileXPathMatcher:function(){var e=this.expression,ps=Selector.patterns,x=Selector.xpath,le,m;if(Selector._cache[e]){this.xpath=Selector._cache[e];return;}
this.matcher=['.//*'];while(e&&le!=e&&(/\S/).test(e)){le=e;for(var i in ps){if(m=e.match(ps[i])){this.matcher.push(Object.isFunction(x[i])?x[i](m):new Template(x[i]).evaluate(m));e=e.replace(m[0],'');break;}}}
this.xpath=this.matcher.join('');Selector._cache[this.expression]=this.xpath;},findElements:function(root){root=root||document;var e=this.expression,results;switch(this.mode){case'selectorsAPI':if(root!==document){var oldId=root.id,id=$(root).identify();e="#"+id+" "+e;}
results=$A(root.querySelectorAll(e)).map(Element.extend);root.id=oldId;return results;case'xpath':return document._getElementsByXPath(this.xpath,root);default:return this.matcher(root);}},match:function(element){this.tokens=[];var e=this.expression,ps=Selector.patterns,as=Selector.assertions;var le,p,m;while(e&&le!==e&&(/\S/).test(e)){le=e;for(var i in ps){p=ps[i];if(m=e.match(p)){if(as[i]){this.tokens.push([i,Object.clone(m)]);e=e.replace(m[0],'');}else{return this.findElements(document).include(element);}}}}
var match=true,name,matches;for(var i=0,token;token=this.tokens[i];i++){name=token[0],matches=token[1];if(!Selector.assertions[name](element,matches)){match=false;break;}}
return match;},toString:function(){return this.expression;},inspect:function(){return"#<Selector:"+this.expression.inspect()+">";}});Object.extend(Selector,{_cache:{},xpath:{descendant:"//*",child:"/*",adjacent:"/following-sibling::*[1]",laterSibling:'/following-sibling::*',tagName:function(m){if(m[1]=='*')return'';return"[local-name()='"+m[1].toLowerCase()+"' or local-name()='"+m[1].toUpperCase()+"']";},className:"[contains(concat(' ', @class, ' '), ' #{1} ')]",id:"[@id='#{1}']",attrPresence:function(m){m[1]=m[1].toLowerCase();return new Template("[@#{1}]").evaluate(m);},attr:function(m){m[1]=m[1].toLowerCase();m[3]=m[5]||m[6];return new Template(Selector.xpath.operators[m[2]]).evaluate(m);},pseudo:function(m){var h=Selector.xpath.pseudos[m[1]];if(!h)return'';if(Object.isFunction(h))return h(m);return new Template(Selector.xpath.pseudos[m[1]]).evaluate(m);},operators:{'=':"[@#{1}='#{3}']",'!=':"[@#{1}!='#{3}']",'^=':"[starts-with(@#{1}, '#{3}')]",'$=':"[substring(@#{1}, (string-length(@#{1}) - string-length('#{3}') + 1))='#{3}']",'*=':"[contains(@#{1}, '#{3}')]",'~=':"[contains(concat(' ', @#{1}, ' '), ' #{3} ')]",'|=':"[contains(concat('-', @#{1}, '-'), '-#{3}-')]"},pseudos:{'first-child':'[not(preceding-sibling::*)]','last-child':'[not(following-sibling::*)]','only-child':'[not(preceding-sibling::* or following-sibling::*)]','empty':"[count(*) = 0 and (count(text()) = 0)]",'checked':"[@checked]",'disabled':"[(@disabled) and (@type!='hidden')]",'enabled':"[not(@disabled) and (@type!='hidden')]",'not':function(m){var e=m[6],p=Selector.patterns,x=Selector.xpath,le,v;var exclusion=[];while(e&&le!=e&&(/\S/).test(e)){le=e;for(var i in p){if(m=e.match(p[i])){v=Object.isFunction(x[i])?x[i](m):new Template(x[i]).evaluate(m);exclusion.push("("+v.substring(1,v.length-1)+")");e=e.replace(m[0],'');break;}}}
return"[not("+exclusion.join(" and ")+")]";},'nth-child':function(m){return Selector.xpath.pseudos.nth("(count(./preceding-sibling::*) + 1) ",m);},'nth-last-child':function(m){return Selector.xpath.pseudos.nth("(count(./following-sibling::*) + 1) ",m);},'nth-of-type':function(m){return Selector.xpath.pseudos.nth("position() ",m);},'nth-last-of-type':function(m){return Selector.xpath.pseudos.nth("(last() + 1 - position()) ",m);},'first-of-type':function(m){m[6]="1";return Selector.xpath.pseudos['nth-of-type'](m);},'last-of-type':function(m){m[6]="1";return Selector.xpath.pseudos['nth-last-of-type'](m);},'only-of-type':function(m){var p=Selector.xpath.pseudos;return p['first-of-type'](m)+p['last-of-type'](m);},nth:function(fragment,m){var mm,formula=m[6],predicate;if(formula=='even')formula='2n+0';if(formula=='odd')formula='2n+1';if(mm=formula.match(/^(\d+)$/))
return'['+fragment+"= "+mm[1]+']';if(mm=formula.match(/^(-?\d*)?n(([+-])(\d+))?/)){if(mm[1]=="-")mm[1]=-1;var a=mm[1]?Number(mm[1]):1;var b=mm[2]?Number(mm[2]):0;predicate="[((#{fragment} - #{b}) mod #{a} = 0) and "+"((#{fragment} - #{b}) div #{a} >= 0)]";return new Template(predicate).evaluate({fragment:fragment,a:a,b:b});}}}},criteria:{tagName:'n = h.tagName(n, r, "#{1}", c);      c = false;',className:'n = h.className(n, r, "#{1}", c);    c = false;',id:'n = h.id(n, r, "#{1}", c);           c = false;',attrPresence:'n = h.attrPresence(n, r, "#{1}", c); c = false;',attr:function(m){m[3]=(m[5]||m[6]);return new Template('n = h.attr(n, r, "#{1}", "#{3}", "#{2}", c); c = false;').evaluate(m);},pseudo:function(m){if(m[6])m[6]=m[6].replace(/"/g,'\\"');return new Template('n = h.pseudo(n, "#{1}", "#{6}", r, c); c = false;').evaluate(m);},descendant:'c = "descendant";',child:'c = "child";',adjacent:'c = "adjacent";',laterSibling:'c = "laterSibling";'},patterns:{laterSibling:/^\s*~\s*/,child:/^\s*>\s*/,adjacent:/^\s*\+\s*/,descendant:/^\s/,tagName:/^\s*(\*|[\w\-]+)(\b|$)?/,id:/^#([\w\-\*]+)(\b|$)/,className:/^\.([\w\-\*]+)(\b|$)/,pseudo:/^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s|[:+~>]))/,attrPresence:/^\[((?:[\w]+:)?[\w]+)\]/,attr:/\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/},assertions:{tagName:function(element,matches){return matches[1].toUpperCase()==element.tagName.toUpperCase();},className:function(element,matches){return Element.hasClassName(element,matches[1]);},id:function(element,matches){return element.id===matches[1];},attrPresence:function(element,matches){return Element.hasAttribute(element,matches[1]);},attr:function(element,matches){var nodeValue=Element.readAttribute(element,matches[1]);return nodeValue&&Selector.operators[matches[2]](nodeValue,matches[5]||matches[6]);}},handlers:{concat:function(a,b){for(var i=0,node;node=b[i];i++)
a.push(node);return a;},mark:function(nodes){var _true=Prototype.emptyFunction;for(var i=0,node;node=nodes[i];i++)
node._countedByPrototype=_true;return nodes;},unmark:function(nodes){for(var i=0,node;node=nodes[i];i++)
node._countedByPrototype=undefined;return nodes;},index:function(parentNode,reverse,ofType){parentNode._countedByPrototype=Prototype.emptyFunction;if(reverse){for(var nodes=parentNode.childNodes,i=nodes.length-1,j=1;i>=0;i--){var node=nodes[i];if(node.nodeType==1&&(!ofType||node._countedByPrototype))node.nodeIndex=j++;}}else{for(var i=0,j=1,nodes=parentNode.childNodes;node=nodes[i];i++)
if(node.nodeType==1&&(!ofType||node._countedByPrototype))node.nodeIndex=j++;}},unique:function(nodes){if(nodes.length==0)return nodes;var results=[],n;for(var i=0,l=nodes.length;i<l;i++)
if(!(n=nodes[i])._countedByPrototype){n._countedByPrototype=Prototype.emptyFunction;results.push(Element.extend(n));}
return Selector.handlers.unmark(results);},descendant:function(nodes){var h=Selector.handlers;for(var i=0,results=[],node;node=nodes[i];i++)
h.concat(results,node.getElementsByTagName('*'));return results;},child:function(nodes){var h=Selector.handlers;for(var i=0,results=[],node;node=nodes[i];i++){for(var j=0,child;child=node.childNodes[j];j++)
if(child.nodeType==1&&child.tagName!='!')results.push(child);}
return results;},adjacent:function(nodes){for(var i=0,results=[],node;node=nodes[i];i++){var next=this.nextElementSibling(node);if(next)results.push(next);}
return results;},laterSibling:function(nodes){var h=Selector.handlers;for(var i=0,results=[],node;node=nodes[i];i++)
h.concat(results,Element.nextSiblings(node));return results;},nextElementSibling:function(node){while(node=node.nextSibling)
if(node.nodeType==1)return node;return null;},previousElementSibling:function(node){while(node=node.previousSibling)
if(node.nodeType==1)return node;return null;},tagName:function(nodes,root,tagName,combinator){var uTagName=tagName.toUpperCase();var results=[],h=Selector.handlers;if(nodes){if(combinator){if(combinator=="descendant"){for(var i=0,node;node=nodes[i];i++)
h.concat(results,node.getElementsByTagName(tagName));return results;}else nodes=this[combinator](nodes);if(tagName=="*")return nodes;}
for(var i=0,node;node=nodes[i];i++)
if(node.tagName.toUpperCase()===uTagName)results.push(node);return results;}else return root.getElementsByTagName(tagName);},id:function(nodes,root,id,combinator){var targetNode=$(id),h=Selector.handlers;if(!targetNode)return[];if(!nodes&&root==document)return[targetNode];if(nodes){if(combinator){if(combinator=='child'){for(var i=0,node;node=nodes[i];i++)
if(targetNode.parentNode==node)return[targetNode];}else if(combinator=='descendant'){for(var i=0,node;node=nodes[i];i++)
if(Element.descendantOf(targetNode,node))return[targetNode];}else if(combinator=='adjacent'){for(var i=0,node;node=nodes[i];i++)
if(Selector.handlers.previousElementSibling(targetNode)==node)
return[targetNode];}else nodes=h[combinator](nodes);}
for(var i=0,node;node=nodes[i];i++)
if(node==targetNode)return[targetNode];return[];}
return(targetNode&&Element.descendantOf(targetNode,root))?[targetNode]:[];},className:function(nodes,root,className,combinator){if(nodes&&combinator)nodes=this[combinator](nodes);return Selector.handlers.byClassName(nodes,root,className);},byClassName:function(nodes,root,className){if(!nodes)nodes=Selector.handlers.descendant([root]);var needle=' '+className+' ';for(var i=0,results=[],node,nodeClassName;node=nodes[i];i++){nodeClassName=node.className;if(nodeClassName.length==0)continue;if(nodeClassName==className||(' '+nodeClassName+' ').include(needle))
results.push(node);}
return results;},attrPresence:function(nodes,root,attr,combinator){if(!nodes)nodes=root.getElementsByTagName("*");if(nodes&&combinator)nodes=this[combinator](nodes);var results=[];for(var i=0,node;node=nodes[i];i++)
if(Element.hasAttribute(node,attr))results.push(node);return results;},attr:function(nodes,root,attr,value,operator,combinator){if(!nodes)nodes=root.getElementsByTagName("*");if(nodes&&combinator)nodes=this[combinator](nodes);var handler=Selector.operators[operator],results=[];for(var i=0,node;node=nodes[i];i++){var nodeValue=Element.readAttribute(node,attr);if(nodeValue===null)continue;if(handler(nodeValue,value))results.push(node);}
return results;},pseudo:function(nodes,name,value,root,combinator){if(nodes&&combinator)nodes=this[combinator](nodes);if(!nodes)nodes=root.getElementsByTagName("*");return Selector.pseudos[name](nodes,value,root);}},pseudos:{'first-child':function(nodes,value,root){for(var i=0,results=[],node;node=nodes[i];i++){if(Selector.handlers.previousElementSibling(node))continue;results.push(node);}
return results;},'last-child':function(nodes,value,root){for(var i=0,results=[],node;node=nodes[i];i++){if(Selector.handlers.nextElementSibling(node))continue;results.push(node);}
return results;},'only-child':function(nodes,value,root){var h=Selector.handlers;for(var i=0,results=[],node;node=nodes[i];i++)
if(!h.previousElementSibling(node)&&!h.nextElementSibling(node))
results.push(node);return results;},'nth-child':function(nodes,formula,root){return Selector.pseudos.nth(nodes,formula,root);},'nth-last-child':function(nodes,formula,root){return Selector.pseudos.nth(nodes,formula,root,true);},'nth-of-type':function(nodes,formula,root){return Selector.pseudos.nth(nodes,formula,root,false,true);},'nth-last-of-type':function(nodes,formula,root){return Selector.pseudos.nth(nodes,formula,root,true,true);},'first-of-type':function(nodes,formula,root){return Selector.pseudos.nth(nodes,"1",root,false,true);},'last-of-type':function(nodes,formula,root){return Selector.pseudos.nth(nodes,"1",root,true,true);},'only-of-type':function(nodes,formula,root){var p=Selector.pseudos;return p['last-of-type'](p['first-of-type'](nodes,formula,root),formula,root);},getIndices:function(a,b,total){if(a==0)return b>0?[b]:[];return $R(1,total).inject([],function(memo,i){if(0==(i-b)%a&&(i-b)/a>=0)memo.push(i);return memo;});},nth:function(nodes,formula,root,reverse,ofType){if(nodes.length==0)return[];if(formula=='even')formula='2n+0';if(formula=='odd')formula='2n+1';var h=Selector.handlers,results=[],indexed=[],m;h.mark(nodes);for(var i=0,node;node=nodes[i];i++){if(!node.parentNode._countedByPrototype){h.index(node.parentNode,reverse,ofType);indexed.push(node.parentNode);}}
if(formula.match(/^\d+$/)){formula=Number(formula);for(var i=0,node;node=nodes[i];i++)
if(node.nodeIndex==formula)results.push(node);}else if(m=formula.match(/^(-?\d*)?n(([+-])(\d+))?/)){if(m[1]=="-")m[1]=-1;var a=m[1]?Number(m[1]):1;var b=m[2]?Number(m[2]):0;var indices=Selector.pseudos.getIndices(a,b,nodes.length);for(var i=0,node,l=indices.length;node=nodes[i];i++){for(var j=0;j<l;j++)
if(node.nodeIndex==indices[j])results.push(node);}}
h.unmark(nodes);h.unmark(indexed);return results;},'empty':function(nodes,value,root){for(var i=0,results=[],node;node=nodes[i];i++){if(node.tagName=='!'||node.firstChild)continue;results.push(node);}
return results;},'not':function(nodes,selector,root){var h=Selector.handlers,selectorType,m;var exclusions=new Selector(selector).findElements(root);h.mark(exclusions);for(var i=0,results=[],node;node=nodes[i];i++)
if(!node._countedByPrototype)results.push(node);h.unmark(exclusions);return results;},'enabled':function(nodes,value,root){for(var i=0,results=[],node;node=nodes[i];i++)
if(!node.disabled&&(!node.type||node.type!=='hidden'))
results.push(node);return results;},'disabled':function(nodes,value,root){for(var i=0,results=[],node;node=nodes[i];i++)
if(node.disabled)results.push(node);return results;},'checked':function(nodes,value,root){for(var i=0,results=[],node;node=nodes[i];i++)
if(node.checked)results.push(node);return results;}},operators:{'=':function(nv,v){return nv==v;},'!=':function(nv,v){return nv!=v;},'^=':function(nv,v){return nv==v||nv&&nv.startsWith(v);},'$=':function(nv,v){return nv==v||nv&&nv.endsWith(v);},'*=':function(nv,v){return nv==v||nv&&nv.include(v);},'$=':function(nv,v){return nv.endsWith(v);},'*=':function(nv,v){return nv.include(v);},'~=':function(nv,v){return(' '+nv+' ').include(' '+v+' ');},'|=':function(nv,v){return('-'+(nv||"").toUpperCase()+'-').include('-'+(v||"").toUpperCase()+'-');}},split:function(expression){var expressions=[];expression.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/,function(m){expressions.push(m[1].strip());});return expressions;},matchElements:function(elements,expression){var matches=$$(expression),h=Selector.handlers;h.mark(matches);for(var i=0,results=[],element;element=elements[i];i++)
if(element._countedByPrototype)results.push(element);h.unmark(matches);return results;},findElement:function(elements,expression,index){if(Object.isNumber(expression)){index=expression;expression=false;}
return Selector.matchElements(elements,expression||'*')[index||0];},findChildElements:function(element,expressions){expressions=Selector.split(expressions.join(','));var results=[],h=Selector.handlers;for(var i=0,l=expressions.length,selector;i<l;i++){selector=new Selector(expressions[i].strip());h.concat(results,selector.findElements(element));}
return(l>1)?h.unique(results):results;}});if(Prototype.Browser.IE){Object.extend(Selector.handlers,{concat:function(a,b){for(var i=0,node;node=b[i];i++)
if(node.tagName!=="!")a.push(node);return a;},unmark:function(nodes){for(var i=0,node;node=nodes[i];i++)
node.removeAttribute('_countedByPrototype');return nodes;}});}
function $$(){return Selector.findChildElements(document,$A(arguments));}
var Form={reset:function(form){$(form).reset();return form;},serializeElements:function(elements,options){if(typeof options!='object')options={hash:!!options};else if(Object.isUndefined(options.hash))options.hash=true;var key,value,submitted=false,submit=options.submit;var data=elements.inject({},function(result,element){if(!element.disabled&&element.name){key=element.name;value=$(element).getValue();if(value!=null&&element.type!='file'&&(element.type!='submit'||(!submitted&&submit!==false&&(!submit||key==submit)&&(submitted=true)))){if(key in result){if(!Object.isArray(result[key]))result[key]=[result[key]];result[key].push(value);}
else result[key]=value;}}
return result;});return options.hash?data:Object.toQueryString(data);}};Form.Methods={serialize:function(form,options){return Form.serializeElements(Form.getElements(form),options);},getElements:function(form){return $A($(form).getElementsByTagName('*')).inject([],function(elements,child){if(Form.Element.Serializers[child.tagName.toLowerCase()])
elements.push(Element.extend(child));return elements;});},getInputs:function(form,typeName,name){form=$(form);var inputs=form.getElementsByTagName('input');if(!typeName&&!name)return $A(inputs).map(Element.extend);for(var i=0,matchingInputs=[],length=inputs.length;i<length;i++){var input=inputs[i];if((typeName&&input.type!=typeName)||(name&&input.name!=name))
continue;matchingInputs.push(Element.extend(input));}
return matchingInputs;},disable:function(form){form=$(form);Form.getElements(form).invoke('disable');return form;},enable:function(form){form=$(form);Form.getElements(form).invoke('enable');return form;},findFirstElement:function(form){var elements=$(form).getElements().findAll(function(element){return'hidden'!=element.type&&!element.disabled;});var firstByIndex=elements.findAll(function(element){return element.hasAttribute('tabIndex')&&element.tabIndex>=0;}).sortBy(function(element){return element.tabIndex}).first();return firstByIndex?firstByIndex:elements.find(function(element){return['input','select','textarea'].include(element.tagName.toLowerCase());});},focusFirstElement:function(form){form=$(form);form.findFirstElement().activate();return form;},request:function(form,options){form=$(form),options=Object.clone(options||{});var params=options.parameters,action=form.readAttribute('action')||'';if(action.blank())action=window.location.href;options.parameters=form.serialize(true);if(params){if(Object.isString(params))params=params.toQueryParams();Object.extend(options.parameters,params);}
if(form.hasAttribute('method')&&!options.method)
options.method=form.method;return new Ajax.Request(action,options);}};Form.Element={focus:function(element){$(element).focus();return element;},select:function(element){$(element).select();return element;}};Form.Element.Methods={serialize:function(element){element=$(element);if(!element.disabled&&element.name){var value=element.getValue();if(value!=undefined){var pair={};pair[element.name]=value;return Object.toQueryString(pair);}}
return'';},getValue:function(element){element=$(element);var method=element.tagName.toLowerCase();return Form.Element.Serializers[method](element);},setValue:function(element,value){element=$(element);var method=element.tagName.toLowerCase();Form.Element.Serializers[method](element,value);return element;},clear:function(element){$(element).value='';return element;},present:function(element){return $(element).value!='';},activate:function(element){element=$(element);try{element.focus();if(element.select&&(element.tagName.toLowerCase()!='input'||!['button','reset','submit'].include(element.type)))
element.select();}catch(e){}
return element;},disable:function(element){element=$(element);element.disabled=true;return element;},enable:function(element){element=$(element);element.disabled=false;return element;}};var Field=Form.Element;var $F=Form.Element.Methods.getValue;Form.Element.Serializers={input:function(element,value){switch(element.type.toLowerCase()){case'checkbox':case'radio':return Form.Element.Serializers.inputSelector(element,value);default:return Form.Element.Serializers.textarea(element,value);}},inputSelector:function(element,value){if(Object.isUndefined(value))return element.checked?element.value:null;else element.checked=!!value;},textarea:function(element,value){if(Object.isUndefined(value))return element.value;else element.value=value;},select:function(element,value){if(Object.isUndefined(value))
return this[element.type=='select-one'?'selectOne':'selectMany'](element);else{var opt,currentValue,single=!Object.isArray(value);for(var i=0,length=element.length;i<length;i++){opt=element.options[i];currentValue=this.optionValue(opt);if(single){if(currentValue==value){opt.selected=true;return;}}
else opt.selected=value.include(currentValue);}}},selectOne:function(element){var index=element.selectedIndex;return index>=0?this.optionValue(element.options[index]):null;},selectMany:function(element){var values,length=element.length;if(!length)return null;for(var i=0,values=[];i<length;i++){var opt=element.options[i];if(opt.selected)values.push(this.optionValue(opt));}
return values;},optionValue:function(opt){return Element.extend(opt).hasAttribute('value')?opt.value:opt.text;}};Abstract.TimedObserver=Class.create(PeriodicalExecuter,{initialize:function($super,element,frequency,callback){$super(callback,frequency);this.element=$(element);this.lastValue=this.getValue();},execute:function(){var value=this.getValue();if(Object.isString(this.lastValue)&&Object.isString(value)?this.lastValue!=value:String(this.lastValue)!=String(value)){this.callback(this.element,value);this.lastValue=value;}}});Form.Element.Observer=Class.create(Abstract.TimedObserver,{getValue:function(){return Form.Element.getValue(this.element);}});Form.Observer=Class.create(Abstract.TimedObserver,{getValue:function(){return Form.serialize(this.element);}});Abstract.EventObserver=Class.create({initialize:function(element,callback){this.element=$(element);this.callback=callback;this.lastValue=this.getValue();if(this.element.tagName.toLowerCase()=='form')
this.registerFormCallbacks();else
this.registerCallback(this.element);},onElementEvent:function(){var value=this.getValue();if(this.lastValue!=value){this.callback(this.element,value);this.lastValue=value;}},registerFormCallbacks:function(){Form.getElements(this.element).each(this.registerCallback,this);},registerCallback:function(element){if(element.type){switch(element.type.toLowerCase()){case'checkbox':case'radio':Event.observe(element,'click',this.onElementEvent.bind(this));break;default:Event.observe(element,'change',this.onElementEvent.bind(this));break;}}}});Form.Element.EventObserver=Class.create(Abstract.EventObserver,{getValue:function(){return Form.Element.getValue(this.element);}});Form.EventObserver=Class.create(Abstract.EventObserver,{getValue:function(){return Form.serialize(this.element);}});if(!window.Event)var Event={};Object.extend(Event,{KEY_BACKSPACE:8,KEY_TAB:9,KEY_RETURN:13,KEY_ESC:27,KEY_LEFT:37,KEY_UP:38,KEY_RIGHT:39,KEY_DOWN:40,KEY_DELETE:46,KEY_HOME:36,KEY_END:35,KEY_PAGEUP:33,KEY_PAGEDOWN:34,KEY_INSERT:45,cache:{},relatedTarget:function(event){var element;switch(event.type){case'mouseover':element=event.fromElement;break;case'mouseout':element=event.toElement;break;default:return null;}
return Element.extend(element);}});Event.Methods=(function(){var isButton;if(Prototype.Browser.IE){var buttonMap={0:1,1:4,2:2};isButton=function(event,code){return event.button==buttonMap[code];};}else if(Prototype.Browser.WebKit){isButton=function(event,code){switch(code){case 0:return event.which==1&&!event.metaKey;case 1:return event.which==1&&event.metaKey;default:return false;}};}else{isButton=function(event,code){return event.which?(event.which===code+1):(event.button===code);};}
return{isLeftClick:function(event){return isButton(event,0)},isMiddleClick:function(event){return isButton(event,1)},isRightClick:function(event){return isButton(event,2)},element:function(event){event=Event.extend(event);var node=event.target,type=event.type,currentTarget=event.currentTarget;if(currentTarget&&currentTarget.tagName){if(type==='load'||type==='error'||(type==='click'&&currentTarget.tagName.toLowerCase()==='input'&&currentTarget.type==='radio'))
node=currentTarget;}
if(node.nodeType==Node.TEXT_NODE)node=node.parentNode;return Element.extend(node);},findElement:function(event,expression){var element=Event.element(event);if(!expression)return element;var elements=[element].concat(element.ancestors());return Selector.findElement(elements,expression,0);},pointer:function(event){var docElement=document.documentElement,body=document.body||{scrollLeft:0,scrollTop:0};return{x:event.pageX||(event.clientX+
(docElement.scrollLeft||body.scrollLeft)-
(docElement.clientLeft||0)),y:event.pageY||(event.clientY+
(docElement.scrollTop||body.scrollTop)-
(docElement.clientTop||0))};},pointerX:function(event){return Event.pointer(event).x},pointerY:function(event){return Event.pointer(event).y},stop:function(event){Event.extend(event);event.preventDefault();event.stopPropagation();event.stopped=true;}};})();Event.extend=(function(){var methods=Object.keys(Event.Methods).inject({},function(m,name){m[name]=Event.Methods[name].methodize();return m;});if(Prototype.Browser.IE){Object.extend(methods,{stopPropagation:function(){this.cancelBubble=true},preventDefault:function(){this.returnValue=false},inspect:function(){return"[object Event]"}});return function(event){if(!event)return false;if(event._extendedByPrototype)return event;event._extendedByPrototype=Prototype.emptyFunction;var pointer=Event.pointer(event);Object.extend(event,{target:event.srcElement,relatedTarget:Event.relatedTarget(event),pageX:pointer.x,pageY:pointer.y});return Object.extend(event,methods);};}else{Event.prototype=Event.prototype||document.createEvent("HTMLEvents")['__proto__'];Object.extend(Event.prototype,methods);return Prototype.K;}})();Object.extend(Event,(function(){var cache=Event.cache;function getEventID(element){if(element._prototypeEventID)return element._prototypeEventID[0];arguments.callee.id=arguments.callee.id||1;return element._prototypeEventID=[++arguments.callee.id];}
function getDOMEventName(eventName){if(eventName&&eventName.include(':'))return"dataavailable";return eventName;}
function getCacheForID(id){return cache[id]=cache[id]||{};}
function getWrappersForEventName(id,eventName){var c=getCacheForID(id);return c[eventName]=c[eventName]||[];}
function createWrapper(element,eventName,handler){var id=getEventID(element);var c=getWrappersForEventName(id,eventName);if(c.pluck("handler").include(handler))return false;var wrapper=function(event){if(!Event||!Event.extend||(event.eventName&&event.eventName!=eventName))
return false;Event.extend(event);handler.call(element,event);};wrapper.handler=handler;c.push(wrapper);return wrapper;}
function findWrapper(id,eventName,handler){var c=getWrappersForEventName(id,eventName);return c.find(function(wrapper){return wrapper.handler==handler});}
function destroyWrapper(id,eventName,handler){var c=getCacheForID(id);if(!c[eventName])return false;c[eventName]=c[eventName].without(findWrapper(id,eventName,handler));}
function destroyCache(){for(var id in cache)
for(var eventName in cache[id])
cache[id][eventName]=null;}
if(window.attachEvent){window.attachEvent("onunload",destroyCache);}
if(Prototype.Browser.WebKit){window.addEventListener('unload',Prototype.emptyFunction,false);}
return{observe:function(element,eventName,handler){element=$(element);var name=getDOMEventName(eventName);var wrapper=createWrapper(element,eventName,handler);if(!wrapper)return element;if(element.addEventListener){element.addEventListener(name,wrapper,false);}else{element.attachEvent("on"+name,wrapper);}
return element;},stopObserving:function(element,eventName,handler){element=$(element);var id=getEventID(element),name=getDOMEventName(eventName);if(!handler&&eventName){getWrappersForEventName(id,eventName).each(function(wrapper){element.stopObserving(eventName,wrapper.handler);});return element;}else if(!eventName){Object.keys(getCacheForID(id)).each(function(eventName){element.stopObserving(eventName);});return element;}
var wrapper=findWrapper(id,eventName,handler);if(!wrapper)return element;if(element.removeEventListener){element.removeEventListener(name,wrapper,false);}else{element.detachEvent("on"+name,wrapper);}
destroyWrapper(id,eventName,handler);return element;},fire:function(element,eventName,memo){element=$(element);if(element==document&&document.createEvent&&!element.dispatchEvent)
element=document.documentElement;var event;if(document.createEvent){event=document.createEvent("HTMLEvents");event.initEvent("dataavailable",true,true);}else{event=document.createEventObject();event.eventType="ondataavailable";}
event.eventName=eventName;event.memo=memo||{};if(document.createEvent){element.dispatchEvent(event);}else{element.fireEvent(event.eventType,event);}
return Event.extend(event);}};})());Object.extend(Event,Event.Methods);Element.addMethods({fire:Event.fire,observe:Event.observe,stopObserving:Event.stopObserving});Object.extend(document,{fire:Element.Methods.fire.methodize(),observe:Element.Methods.observe.methodize(),stopObserving:Element.Methods.stopObserving.methodize(),loaded:false});(function(){var timer;function fireContentLoadedEvent(){if(document.loaded)return;if(timer)window.clearInterval(timer);document.fire("dom:loaded");document.loaded=true;}
if(document.addEventListener){if(Prototype.Browser.WebKit){timer=window.setInterval(function(){if(/loaded|complete/.test(document.readyState))
fireContentLoadedEvent();},0);Event.observe(window,"load",fireContentLoadedEvent);}else{document.addEventListener("DOMContentLoaded",fireContentLoadedEvent,false);}}else{document.write("<script id=__onDOMContentLoaded defer src=//:><\/script>");$("__onDOMContentLoaded").onreadystatechange=function(){if(this.readyState=="complete"){this.onreadystatechange=null;fireContentLoadedEvent();}};}})();Hash.toQueryString=Object.toQueryString;var Toggle={display:Element.toggle};Element.Methods.childOf=Element.Methods.descendantOf;var Insertion={Before:function(element,content){return Element.insert(element,{before:content});},Top:function(element,content){return Element.insert(element,{top:content});},Bottom:function(element,content){return Element.insert(element,{bottom:content});},After:function(element,content){return Element.insert(element,{after:content});}};var $continue=new Error('"throw $continue" is deprecated, use "return" instead');var Position={includeScrollOffsets:false,prepare:function(){this.deltaX=window.pageXOffset||document.documentElement.scrollLeft||document.body.scrollLeft||0;this.deltaY=window.pageYOffset||document.documentElement.scrollTop||document.body.scrollTop||0;},within:function(element,x,y){if(this.includeScrollOffsets)
return this.withinIncludingScrolloffsets(element,x,y);this.xcomp=x;this.ycomp=y;this.offset=Element.cumulativeOffset(element);return(y>=this.offset[1]&&y<this.offset[1]+element.offsetHeight&&x>=this.offset[0]&&x<this.offset[0]+element.offsetWidth);},withinIncludingScrolloffsets:function(element,x,y){var offsetcache=Element.cumulativeScrollOffset(element);this.xcomp=x+offsetcache[0]-this.deltaX;this.ycomp=y+offsetcache[1]-this.deltaY;this.offset=Element.cumulativeOffset(element);return(this.ycomp>=this.offset[1]&&this.ycomp<this.offset[1]+element.offsetHeight&&this.xcomp>=this.offset[0]&&this.xcomp<this.offset[0]+element.offsetWidth);},overlap:function(mode,element){if(!mode)return 0;if(mode=='vertical')
return((this.offset[1]+element.offsetHeight)-this.ycomp)/element.offsetHeight;if(mode=='horizontal')
return((this.offset[0]+element.offsetWidth)-this.xcomp)/element.offsetWidth;},cumulativeOffset:Element.Methods.cumulativeOffset,positionedOffset:Element.Methods.positionedOffset,absolutize:function(element){Position.prepare();return Element.absolutize(element);},relativize:function(element){Position.prepare();return Element.relativize(element);},realOffset:Element.Methods.cumulativeScrollOffset,offsetParent:Element.Methods.getOffsetParent,page:Element.Methods.viewportOffset,clone:function(source,target,options){options=options||{};return Element.clonePosition(target,source,options);}};if(!document.getElementsByClassName)document.getElementsByClassName=function(instanceMethods){function iter(name){return name.blank()?null:"[contains(concat(' ', @class, ' '), ' "+name+" ')]";}
instanceMethods.getElementsByClassName=Prototype.BrowserFeatures.XPath?function(element,className){className=className.toString().strip();var cond=/\s/.test(className)?$w(className).map(iter).join(''):iter(className);return cond?document._getElementsByXPath('.//*'+cond,element):[];}:function(element,className){className=className.toString().strip();var elements=[],classNames=(/\s/.test(className)?$w(className):null);if(!classNames&&!className)return elements;var nodes=$(element).getElementsByTagName('*');className=' '+className+' ';for(var i=0,child,cn;child=nodes[i];i++){if(child.className&&(cn=' '+child.className+' ')&&(cn.include(className)||(classNames&&classNames.all(function(name){return!name.toString().blank()&&cn.include(' '+name+' ');}))))
elements.push(Element.extend(child));}
return elements;};return function(className,parentElement){return $(parentElement||document.body).getElementsByClassName(className);};}(Element.Methods);Element.ClassNames=Class.create();Element.ClassNames.prototype={initialize:function(element){this.element=$(element);},_each:function(iterator){this.element.className.split(/\s+/).select(function(name){return name.length>0;})._each(iterator);},set:function(className){this.element.className=className;},add:function(classNameToAdd){if(this.include(classNameToAdd))return;this.set($A(this).concat(classNameToAdd).join(' '));},remove:function(classNameToRemove){if(!this.include(classNameToRemove))return;this.set($A(this).without(classNameToRemove).join(' '));},toString:function(){return $A(this).join(' ');}};Object.extend(Element.ClassNames.prototype,Enumerable);Element.addMethods();


if((typeof Stone=='undefined')||!Stone){var Stone={};}
Stone.namespace=function(){var a=arguments,o=null,i,j,d;for(i=0;i<a.length;i=i+1){d=a[i].split('.');o=Stone;for(j=(d[0]=='Stone')?1:0;j<d.length;j=j+1){o[d[j]]=o[d[j]]||{};o=o[d[j]];}}
return o;};Stone.namespace('env');Stone.namespace('ui');(function(){if((typeof YAHOO!='undefined')&&YAHOO&&YAHOO.env&&YAHOO.env.ua)
Stone.env.Browser=YAHOO.env.ua;else
Stone.env.Browser=(function(){var o={ie:0,opera:0,gecko:0,webkit:0,mobile:null,air:0};var ua=navigator.userAgent,m;if((/KHTML/).test(ua)){o.webkit=1;}
m=ua.match(/AppleWebKit\/([^\s]*)/);if(m&&m[1]){o.webkit=parseFloat(m[1]);if(/ Mobile\//.test(ua)){o.mobile="Apple";}else{m=ua.match(/NokiaN[^\/]*/);if(m){o.mobile=m[0];}}
m=ua.match(/AdobeAIR\/([^\s]*)/);if(m){o.air=m[0];}}
if(!o.webkit){m=ua.match(/Opera[\s\/]([^\s]*)/);if(m&&m[1]){o.opera=parseFloat(m[1]);m=ua.match(/Opera Mini[^;]*/);if(m){o.mobile=m[0];}}else{m=ua.match(/MSIE\s([^;]*)/);if(m&&m[1]){o.ie=parseFloat(m[1]);}else{m=ua.match(/Gecko\/([^\s]*)/);if(m){o.gecko=1;m=ua.match(/rv:([^\s\)]*)/);if(m&&m[1]){o.gecko=parseFloat(m[1]);}}}}}
return o;})();})();Stone.ui.HoverButtonManager={buttons:[],namedButtons:{},registerButton:function(hoverButton){this.buttons.push(hoverButton);if(hoverButton.name)
this.namedButtons[hoverButton.name]=hoverButton;}}
Stone.ui.HoverButton=Class.create({initialize:function(element,name){this.element=$(element);this.name=name||null;this.element.observe('mouseover',this.hover.bind(this));this.element.observe('mouseout',this.unhover.bind(this));Stone.ui.HoverButtonManager.registerButton(this);},hover:function(){this.element.addClassName('ee_hover');},unhover:function(){this.element.removeClassName('ee_hover');}});Stone.ui.OptionsForm=Class.create({initialize:function(){document.observe('dom:loaded',ee_isSampleClicked);}});function ee_isSampleClicked(){var isSample=($F('ee_step1Form_inputs_isSample')=='on');$('ee_step1Form_inputs_documentLength').disabled=isSample;$('ee_step1Form_inputs_responseTime_days3').disabled=isSample;$('ee_step1Form_inputs_responseTime_days1').disabled=isSample;};