/*  Prototype JavaScript framework, version 1.5.0_rc1

 *  (c) 2005 Sam Stephenson <sam@conio.net>

 *

 *  Prototype is freely distributable under the terms of an MIT-style license.

 *  For details, see the Prototype web site: http://prototype.conio.net/

 *

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

var Prototype = {

  Version: '1.5.0_rc1',

  ScriptFragment: '(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)',

  emptyFunction: function() {},

  K: function(x) {return x}

}

var Class = {

  create: function() {

    return function() {

      this.initialize.apply(this, arguments);

    }

  }

}

var Abstract = new Object();

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 == undefined) return 'undefined';

      if (object == null) return 'null';

      return object.inspect ? object.inspect() : object.toString();

    } catch (e) {

      if (e instanceof RangeError) return '...';

      throw e;

    }

  },

  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);

  }

});

Function.prototype.bind = function() {

  var __method = this, args = $A(arguments), object = args.shift();

  return function() {

    return __method.apply(object, args.concat($A(arguments)));

  }

}

Function.prototype.bindAsEventListener = function(object) {

  var __method = this, args = $A(arguments), object = args.shift();

  return function(event) {

    return __method.apply(object, [( event || window.event)].concat(args).concat($A(arguments)));

  }

}

Object.extend(Number.prototype, {

  toColorPart: function() {

    var digits = this.toString(16);

    if (this < 16) return '0' + digits;

    return digits;

  },

  succ: function() {

    return this + 1;

  },

  times: function(iterator) {

    $R(0, this, true).each(iterator);

    return this;

  }

});

var Try = {

  these: function() {

    var returnValue;

    for (var i = 0; i < arguments.length; i++) {

      var lambda = arguments[i];

      try {

        returnValue = lambda();

        break;

      } catch (e) {}

    }

    return returnValue;

  }

}

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

var PeriodicalExecuter = Class.create();

PeriodicalExecuter.prototype = {

  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);

  },

  stop: function() {

    if (!this.timer) return;

    clearInterval(this.timer);

    this.timer = null;

  },

  onTimerEvent: function() {

    if (!this.currentlyExecuting) {

      try {

        this.currentlyExecuting = true;

        this.callback(this);

      } finally {

        this.currentlyExecuting = false;

      }

    }

  }

}

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 += (replacement(match) || '').toString();

        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 = count === undefined ? 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 this;

  },

  truncate: function(length, truncation) {

    length = length || 30;

    truncation = truncation === undefined ? '...' : truncation;

    return this.length > length ?

      this.slice(0, length - truncation.length) + truncation : 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 div = document.createElement('div');

    var text = document.createTextNode(this);

    div.appendChild(text);

    return div.innerHTML;

  },

  unescapeHTML: function() {

    var div = document.createElement('div');

    div.innerHTML = this.stripTags();

    return div.childNodes[0] ? div.childNodes[0].nodeValue : '';

  },

  toQueryParams: function() {

    var pairs = this.match(/^\??(.*)$/)[1].split('&');

    return pairs.inject({}, function(params, pairString) {

      var pair  = pairString.split('=');

      var value = pair[1] ? decodeURIComponent(pair[1]) : undefined;

      params[decodeURIComponent(pair[0])] = value;

      return params;

    });

  },

  toArray: function() {

    return this.split('');

  },

  camelize: function() {

    var oStringList = this.split('-');

    if (oStringList.length == 1) return oStringList[0];

    var camelizedString = this.indexOf('-') == 0

      ? oStringList[0].charAt(0).toUpperCase() + oStringList[0].substring(1)

      : oStringList[0];

    for (var i = 1, len = oStringList.length; i < len; i++) {

      var s = oStringList[i];

      camelizedString += s.charAt(0).toUpperCase() + s.substring(1);

    }

    return camelizedString;

  },

  inspect: function(useDoubleQuotes) {

    var escapedString = this.replace(/\\/g, '\\\\');

    if (useDoubleQuotes)

      return '"' + escapedString.replace(/"/g, '\\"') + '"';

    else

      return "'" + escapedString.replace(/'/g, '\\\'') + "'";

  }

});

String.prototype.gsub.prepareReplacement = function(replacement) {

  if (typeof replacement == 'function') return replacement;

  var template = new Template(replacement);

  return function(match) { return template.evaluate(match) };

}

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

var Template = Class.create();

Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;

Template.prototype = {

  initialize: function(template, pattern) {

    this.template = template.toString();

    this.pattern  = pattern || Template.Pattern;

  },

  evaluate: function(object) {

    return this.template.gsub(this.pattern, function(match) {

      var before = match[1];

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

      return before + (object[match[3]] || '').toString();

    });

  }

}

var $break    = new Object();

var $continue = new Object();

var Enumerable = {

  each: function(iterator) {

    var index = 0;

    try {

      this._each(function(value) {

        try {

          iterator(value, index++);

        } catch (e) {

          if (e != $continue) throw e;

        }

      });

    } catch (e) {

      if (e != $break) throw e;

    }

  },

  all: function(iterator) {

    var result = true;

    this.each(function(value, index) {

      result = result && !!(iterator || Prototype.K)(value, index);

      if (!result) throw $break;

    });

    return result;

  },

  any: function(iterator) {

    var result = false;

    this.each(function(value, index) {

      if (result = !!(iterator || Prototype.K)(value, index))

        throw $break;

    });

    return result;

  },

  collect: function(iterator) {

    var results = [];

    this.each(function(value, index) {

      results.push(iterator(value, index));

    });

    return results;

  },

  detect: function (iterator) {

    var result;

    this.each(function(value, index) {

      if (iterator(value, index)) {

        result = value;

        throw $break;

      }

    });

    return result;

  },

  findAll: function(iterator) {

    var results = [];

    this.each(function(value, index) {

      if (iterator(value, index))

        results.push(value);

    });

    return results;

  },

  grep: function(pattern, iterator) {