text: var Prototype = {
      Version: '1.4.0',
      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 (property in source) {
          destination[property] = source[property];
      }
      return destination;
  }
  
  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;
      }
  }
  
  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;
      return function(event) {
          return __method.call(object, event || window.event);
      }
  }
  
  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() {
          setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
      },
  
      onTimerEvent: function() {
          if (!this.currentlyExecuting) {
              try {
                  this.currentlyExecuting = true;
                  this.callback();
              } finally {
                  this.currentlyExecuting = false;
              }
          }
      }
  }
  
  /*--------------------------------------------------------------------------*/
  
  function $() {
      var elements = new Array();
  
      for (var i = 0; i < arguments.length; i++) {
          var element = arguments[i];
          if (typeof element == 'string')
              element = document.getElementById(element);
  
          if (arguments.length == 1)
              return element;
  
          elements.push(element);
      }
  
      return elements;
  }
  Object.extend(String.prototype, {
      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(eval);
      },
  
      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('=');
              params[pair[0]] = pair[1];
              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() {
          return "'" + this.replace('\\', '\\\\').replace("'", '\\\'') + "'";
      }
  });
  
  String.prototype.parseQuery = String.prototype.toQueryParams;
  
  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 = true;
          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) {
          var results = [];
          this.each(function(value, index) {
              var stringValue = value.toString();
              if (stringValue.match(pattern))
                  results.push((iterator || Prototype.K)(value, index));
          })
          return results;
      },
  
      include: function(object) {
          var found = false;
          this.each(function(value) {
              if (value == object) {
                  found = true;
                  throw $break;
              }
          });
          return found;
      },
  
      inject: function(memo, iterator) {
          this.each(function(value, index) {
              memo = iterator(memo, value, index);
          });
          return memo;
      },
  
      invoke: function(method) {
          var args = $A(arguments).slice(1);
          return this.collect(function(value) {
              return value[method].apply(value, args);
          });
      },
  
      max: function(iterator) {
          var result;
          this.each(function(value, index) {
              value = (iterator || Prototype.K)(value, index);
              if (value >= (result || value))
                  result = value;
          });
          return result;
      },
  
      min: function(iterator) {
          var result;
          this.each(function(value, index) {
              value = (iterator || Prototype.K)(value, index);
              if (value <= (result || value))
                  result = value;
          });
          return result;
      },
  
      partition: function(iterator) {
          var trues = [], falses = [];
          this.each(function(value, index) {
              ((iterator || Prototype.K)(value, index) ?
          trues : falses).push(value);
          });
          return [trues, falses];
      },
  
      pluck: function(property) {
          var results = [];
          this.each(function(value, index) {
              results.push(value[property]);
          });
          return results;
      },
  
      reject: function(iterator) {
          var results = [];
          this.each(function(value, index) {
              if (!iterator(value, index))
                  results.push(value);
          });
          return results;
      },
  
      sortBy: function(iterator) {
          return this.collect(function(value, index) {
              return { value: value, criteria: iterator(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.collect(Prototype.K);
      },
  
      zip: function() {
          var iterator = Prototype.K, args = $A(arguments);
          if (typeof args.last() == 'function')
              iterator = args.pop();
  
          var collections = [this].concat(args).map($A);
          return this.map(function(value, index) {
              iterator(value = collections.pluck(index));
              return value;
          });
      },
  
      inspect: function() {
          return '#<Enumerable:' + this.toArray().inspect() + '>';
      }
  }
  
  Object.extend(Enumerable, {
      map: Enumerable.collect,
      find: Enumerable.detect,
      select: Enumerable.findAll,
      member: Enumerable.include,
      entries: Enumerable.toArray
  });
  var $A = Array.from = function(iterable) {
      if (!iterable) return [];
      if (iterable.toArray) {
          return iterable.toArray();
      } else {
          var results = [];
          for (var i = 0; i < iterable.length; i++)
              results.push(iterable[i]);
          return results;
      }
  }
  
  Object.extend(Array.prototype, Enumerable);
  
  Array.prototype._reverse = Array.prototype.reverse;
  
  Object.extend(Array.prototype, {
      _each: function(iterator) {
          for (var i = 0; i < this.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 != undefined || value != null;
          });
      },
  
      flatten: function() {
          return this.inject([], function(array, value) {
              return array.concat(value.constructor == Array ?
          value.flatten() : [value]);
          });
      },
  
      without: function() {
          var values = $A(arguments);
          return this.select(function(value) {
              return !values.include(value);
          });
      },
  
      indexOf: function(object) {
          for (var i = 0; i < this.length; i++)
              if (this[i] == object) return i;
          return -1;
      },
  
      reverse: function(inline) {
          return (inline !== false ? this : this.toArray())._reverse();
      },
  
      shift: function() {
          var result = this[0];
          for (var i = 0; i < this.length - 1; i++)
              this[i] = this[i + 1];
          this.length--;
          return result;
      },
  
      inspect: function() {
          return '[' + this.map(Object.inspect).join(', ') + ']';
      }
  });
  var Hash = {
      _each: function(iterator) {
          for (key in this) {
              var value = this[key];
              if (typeof value == 'function') continue;
  
              var pair = [key, value];
              pair.key = key;
              pair.value = value;
              iterator(pair);
          }
      },
  
      keys: function() {
          return this.pluck('key');
      },
  
      values: function() {
          return this.pluck('value');
      },
  
      merge: function(hash) {
          return $H(hash).inject($H(this), function(mergedHash, pair) {
              mergedHash[pair.key] = pair.value;
              return mergedHash;
          });
      },
  
      toQueryString: function() {
          return this.map(function(pair) {
              return pair.map(encodeURIComponent).join('=');
          }).join('&');
      },
  
      inspect: function() {
          return '#<Hash:{' + this.map(function(pair) {
              return pair.map(Object.inspect).join(': ');
          }).join(', ') + '}>';
      }
  }
  
  function $H(object) {
      var hash = Object.extend({}, object || {});
      Object.extend(hash, Enumerable);
      Object.extend(hash, Hash);
      return hash;
  }
  ObjectRange = Class.create();
  Object.extend(ObjectRange.prototype, Enumerable);
  Object.extend(ObjectRange.prototype, {
      initialize: function(start, end, exclusive) {
          this.start = start;
          this.end = end;
          this.exclusive = exclusive;
      },
  
      _each: function(iterator) {
          var value = this.start;
          do {
              iterator(value);
              value = value.succ();
          } while (this.include(value));
      },
  
      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 ActiveXObject('Msxml2.XMLHTTP') },
        function() { return new ActiveXObject('Microsoft.XMLHTTP') },
        function() { return new XMLHttpRequest() }
      ) || false;
      },
  
      activeRequestCount: 0
  }
  
  Ajax.Responders = {
      responders: [],
  
      _each: function(iterator) {
          this.responders._each(iterator);
      },
  
      register: function(responderToAdd) {
          if (!this.include(responderToAdd))
              this.responders.push(responderToAdd);
      },
  
      unregister: function(responderToRemove) {
          this.responders = this.responders.without(responderToRemove);
      },
  
      dispatch: function(callback, request, transport, json) {
          this.each(function(responder) {
              if (responder[callback] && typeof responder[callback] == 'function') {
                  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 = function() { };
  Ajax.Base.prototype = {
      setOptions: function(options) {
          this.options = {
              method: 'post',
              asynchronous: true,
              parameters: ''
          }
          Object.extend(this.options, options || {});
      },
  
      responseIsSuccess: function() {
          return this.transport.status == undefined
          || this.transport.status == 0
          || (this.transport.status >= 200 && this.transport.status < 300);
      },
  
      responseIsFailure: function() {
          return !this.responseIsSuccess();
      }
  }
  
  Ajax.Request = Class.create();
  Ajax.Request.Events =
    ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];
  
  Ajax.Request.prototype = Object.extend(new Ajax.Base(), {
      initialize: function(url, options) {
          this.transport = Ajax.getTransport();
          this.setOptions(options);
          this.request(url);
      },
  
      request: function(url) {
          var parameters = this.options.parameters || '';
          if (parameters.length > 0) parameters += '&_=';
  
          try {
              this.url = url;
              if (this.options.method == 'get' && parameters.length > 0)
                  this.url += (this.url.match(/\?/) ? '&' : '?') + parameters;
  
              Ajax.Responders.dispatch('onCreate', this, this.transport);
  
              this.transport.open(this.options.method, this.url,
          this.options.asynchronous);
  
              if (this.options.asynchronous) {
                  this.transport.onreadystatechange = this.onStateChange.bind(this);
                  setTimeout((function() { this.respondToReadyState(1) }).bind(this), 10);
              }
  
              this.setRequestHeaders();
  
              var body = this.options.postBody ? this.options.postBody : parameters;
              this.transport.send(this.options.method == 'post' ? body : null);
  
          } catch (e) {
              this.dispatchException(e);
          }
      },
  
      setRequestHeaders: function() {
          var requestHeaders =
        ['X-Requested-With', 'XMLHttpRequest',
         'X-Prototype-Version', Prototype.Version];
  
          if (this.options.method == 'post') {
              requestHeaders.push('Content-type',
          'application/x-www-form-urlencoded');
  
              /* Force "Connection: close" for Mozilla browsers to work around
              * a bug where XMLHttpReqeuest sends an incorrect Content-length
              * header. See Mozilla Bugzilla #246651.
              */
              if (this.transport.overrideMimeType)
                  requestHeaders.push('Connection', 'close');
          }
  
          if (this.options.requestHeaders)
              requestHeaders.push.apply(requestHeaders, this.options.requestHeaders);
  
          for (var i = 0; i < requestHeaders.length; i += 2)
              this.transport.setRequestHeader(requestHeaders[i], requestHeaders[i + 1]);
      },
  
      onStateChange: function() {
          var readyState = this.transport.readyState;
          if (readyState != 1)
              this.respondToReadyState(this.transport.readyState);
      },
  
      header: function(name) {
          try {
              return this.transport.getResponseHeader(name);
          } catch (e) { }
      },
  
      evalJSON: function() {
          try {
              return eval(this.header('X-JSON'));
          } catch (e) { }
      },
  
      evalResponse: function() {
          try {
              return eval(this.transport.responseText);
          } catch (e) {
              this.dispatchException(e);
          }
      },
  
      respondToReadyState: function(readyState) {
          var event = Ajax.Request.Events[readyState];
          var transport = this.transport, json = this.evalJSON();
  
          if (event == 'Complete') {
              try {
                  (this.options['on' + this.transport.status]
           || this.options['on' + (this.responseIsSuccess() ? 'Success' : 'Failure')]
           || Prototype.emptyFunction)(transport, json);
              } catch (e) {
                  this.dispatchException(e);
              }
  
              if ((this.header('Content-type') || '').match(/^text\/javascript/i))
                  this.evalResponse();
          }
  
          try {
              (this.options['on' + event] || Prototype.emptyFunction)(transport, json);
              Ajax.Responders.dispatch('on' + event, this, transport, json);
          } catch (e) {
              this.dispatchException(e);
          }
  
          /* Avoid memory leak in MSIE: clean up the oncomplete event handler */
          if (event == 'Complete')
              this.transport.onreadystatechange = Prototype.emptyFunction;
      },
  
      dispatchException: function(exception) {
          (this.options.onException || Prototype.emptyFunction)(this, exception);
          Ajax.Responders.dispatch('onException', this, exception);
      }
  });
  
  Ajax.Updater = Class.create();
  
  Object.extend(Object.extend(Ajax.Updater.prototype, Ajax.Request.prototype), {
      initialize: function(container, url, options) {
          this.containers = {
              success: container.success ? $(container.success) : $(container),
              failure: container.failure ? $(container.failure) :
          (container.success ? null : $(container))
          }
  
          this.transport = Ajax.getTransport();
          this.setOptions(options);
  
          var onComplete = this.options.onComplete || Prototype.emptyFunction;
          this.options.onComplete = (function(transport, object) {
              this.updateContent();
              onComplete(transport, object);
          }).bind(this);
  
          this.request(url);
      },
  
      updateContent: function() {
          var receiver = this.responseIsSuccess() ?
        this.containers.success : this.containers.failure;
          var response = this.transport.responseText;
  
          if (!this.options.evalScripts)
              response = response.stripScripts();
  
          if (receiver) {
              if (this.options.insertion) {
                  new this.options.insertion(receiver, response);
              } else {
                  Element.update(receiver, response);
              }
          }
  
          if (this.responseIsSuccess()) {
              if (this.onComplete)
                  setTimeout(this.onComplete.bind(this), 10);
          }
      }
  });
  
  Ajax.PeriodicalUpdater = Class.create();
  Ajax.PeriodicalUpdater.prototype = Object.extend(new Ajax.Base(), {
      initialize: function(container, url, options) {
          this.setOptions(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.onComplete = undefined;
          clearTimeout(this.timer);
          (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
      },
  
      updateComplete: function(request) {
          if (this.options.decay) {
              this.decay = (request.responseText == this.lastText ?
          this.decay * this.options.decay : 1);
  
              this.lastText = request.responseText;
          }
          this.timer = setTimeout(this.onTimerEvent.bind(this),
        this.decay * this.frequency * 1000);
      },
  
      onTimerEvent: function() {
          this.updater = new Ajax.Updater(this.container, this.url, this.options);
      }
  });
  document.getElementsByClassName = function(className, parentElement) {
      var children = ($(parentElement) || document.body).getElementsByTagName('*');
      return $A(children).inject([], function(elements, child) {
          if (child.className.match(new RegExp("(^|\\s)" + className + "(\\s|$)")))
              elements.push(child);
          return elements;
      });
  }
  
  /*--------------------------------------------------------------------------*/
  
  if (!window.Element) {
      var Element = new Object();
  }
  
  Object.extend(Element, {
      visible: function(element) {
          return $(element).style.display != 'none';
      },
  
      toggle: function() {
          for (var i = 0; i < arguments.length; i++) {
              var element = $(arguments[i]);
              Element[Element.visible(element) ? 'hide' : 'show'](element);
          }
      },
  
      hide: function() {
          for (var i = 0; i < arguments.length; i++) {
              var element = $(arguments[i]);
              element.style.display = 'none';
          }
      },
  
      show: function() {
          for (var i = 0; i < arguments.length; i++) {
              var element = $(arguments[i]);
              element.style.display = '';
          }
      },
  
      remove: function(element) {
          element = $(element);
          element.parentNode.removeChild(element);
      },
  
      update: function(element, html) {
          $(element).innerHTML = html.stripScripts();
          setTimeout(function() { html.evalScripts() }, 10);
      },
  
      getHeight: function(element) {
          element = $(element);
          return element.offsetHeight;
      },
  
      classNames: function(element) {
          return new Element.ClassNames(element);
      },
  
      hasClassName: function(element, className) {
          if (!(element = $(element))) return;
          return Element.classNames(element).include(className);
      },
  
      addClassName: function(element, className) {
          if (!(element = $(element))) return;
          return Element.classNames(element).add(className);
      },
  
      removeClassName: function(element, className) {
          if (!(element = $(element))) return;
          return Element.classNames(element).remove(className);
      },
  
      // removes whitespace-only text node children
      cleanWhitespace: function(element) {
          element = $(element);
          for (var i = 0; i < element.childNodes.length; i++) {
              var node = element.childNodes[i];
              if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
                  Element.remove(node);
          }
      },
  
      empty: function(element) {
          return $(element).innerHTML.match(/^\s*$/);
      },
  
      scrollTo: function(element) {
          element = $(element);
          var x = element.x ? element.x : element.offsetLeft,
          y = element.y ? element.y : element.offsetTop;
          window.scrollTo(x, y);
      },
  
      getStyle: function(element, style) {
          element = $(element);
          var value = element.style[style.camelize()];
          if (!value) {
              if (document.defaultView && document.defaultView.getComputedStyle) {
                  var css = document.defaultView.getComputedStyle(element, null);
                  value = css ? css.getPropertyValue(style) : null;
              } else if (element.currentStyle) {
                  value = element.currentStyle[style.camelize()];
              }
          }
  
          if (window.opera && ['left', 'top', 'right', 'bottom'].include(style))
              if (Element.getStyle(element, 'position') == 'static') value = 'auto';
  
          return value == 'auto' ? null : value;
      },
  
      setStyle: function(element, style) {
          element = $(element);
          for (name in style)
              element.style[name.camelize()] = style[name];
      },
  
      getDimensions: function(element) {
          element = $(element);
          if (Element.getStyle(element, 'display') != 'none')
              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;
          els.visibility = 'hidden';
          els.position = 'absolute';
          els.display = '';
          var originalWidth = element.clientWidth;
          var originalHeight = element.clientHeight;
          els.display = 'none';
          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 (window.opera) {
                  element.style.top = 0;
                  element.style.left = 0;
              }
          }
      },
  
      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 = '';
          }
      },
  
      makeClipping: function(element) {
          element = $(element);
          if (element._overflow) return;
          element._overflow = element.style.overflow;
          if ((Element.getStyle(element, 'overflow') || 'visible') != 'hidden')
              element.style.overflow = 'hidden';
      },
  
      undoClipping: function(element) {
          element = $(element);
          if (element._overflow) return;
          element.style.overflow = element._overflow;
          element._overflow = undefined;
      }
  });
  
  var Toggle = new Object();
  Toggle.display = Element.toggle;
  
  /*--------------------------------------------------------------------------*/
  
  Abstract.Insertion = function(adjacency) {
      this.adjacency = adjacency;
  }
  
  Abstract.Insertion.prototype = {
      initialize: function(element, content) {
          this.element = $(element);
          this.content = content.stripScripts();
  
          if (this.adjacency && this.element.insertAdjacentHTML) {
              try {
                  this.element.insertAdjacentHTML(this.adjacency, this.content);
              } catch (e) {
                  if (this.element.tagName.toLowerCase() == 'tbody') {
                      this.insertContent(this.contentFromAnonymousTable());
                  } else {
                      throw e;
                  }
              }
          } else {
              this.range = this.element.ownerDocument.createRange();
              if (this.initializeRange) this.initializeRange();
              this.insertContent([this.range.createContextualFragment(this.content)]);
          }
  
          setTimeout(function() { content.evalScripts() }, 10);
      },
  
      contentFromAnonymousTable: function() {
          var div = document.createElement('div');
          div.innerHTML = '<table><tbody>' + this.content + '</tbody></table>';
          return $A(div.childNodes[0].childNodes[0].childNodes);
      }
  }
  
  var Insertion = new Object();
  
  Insertion.Before = Class.create();
  Insertion.Before.prototype = Object.extend(new Abstract.Insertion('beforeBegin'), {
      initializeRange: function() {
          this.range.setStartBefore(this.element);
      },
  
      insertContent: function(fragments) {
          fragments.each((function(fragment) {
              this.element.parentNode.insertBefore(fragment, this.element);
          }).bind(this));
      }
  });
  
  Insertion.Top = Class.create();
  Insertion.Top.prototype = Object.extend(new Abstract.Insertion('afterBegin'), {
      initializeRange: function() {
          this.range.selectNodeContents(this.element);
          this.range.collapse(true);
      },
  
      insertContent: function(fragments) {
          fragments.reverse(false).each((function(fragment) {
              this.element.insertBefore(fragment, this.element.firstChild);
          }).bind(this));
      }
  });
  
  Insertion.Bottom = Class.create();
  Insertion.Bottom.prototype = Object.extend(new Abstract.Insertion('beforeEnd'), {
      initializeRange: function() {
          this.range.selectNodeContents(this.element);
          this.range.collapse(this.element);
      },
  
      insertContent: function(fragments) {
          fragments.each((function(fragment) {
              this.element.appendChild(fragment);
          }).bind(this));
      }
  });
  
  Insertion.After = Class.create();
  Insertion.After.prototype = Object.extend(new Abstract.Insertion('afterEnd'), {
      initializeRange: function() {
          this.range.setStartAfter(this.element);
      },
  
      insertContent: function(fragments) {
          fragments.each((function(fragment) {
              this.element.parentNode.insertBefore(fragment,
          this.element.nextSibling);
          }).bind(this));
      }
  });
  
  /*--------------------------------------------------------------------------*/
  
  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(this.toArray().concat(classNameToAdd).join(' '));
      },
  
      remove: function(classNameToRemove) {
          if (!this.include(classNameToRemove)) return;
          this.set(this.select(function(className) {
              return className != classNameToRemove;
          }).join(' '));
      },
  
      toString: function() {
          return this.toArray().join(' ');
      }
  }
  
  Object.extend(Element.ClassNames.prototype, Enumerable);
  var Field = {
      clear: function() {
          for (var i = 0; i < arguments.length; i++)
              $(arguments[i]).value = '';
      },
  
      focus: function(element) {
          $(element).focus();
      },
  
      present: function() {
          for (var i = 0; i < arguments.length; i++)
              if ($(arguments[i]).value == '') return false;
          return true;
      },
  
      select: function(element) {
          $(element).select();
      },
  
      activate: function(element) {
          element = $(element);
          element.focus();
          if (element.select)
              element.select();
      }
  }
  
  /*--------------------------------------------------------------------------*/
  
  var Form = {
      serialize: function(form) {
          var elements = Form.getElements($(form));
          var queryComponents = new Array();
  
          for (var i = 0; i < elements.length; i++) {
              var queryComponent = Form.Element.serialize(elements[i]);
              if (queryComponent)
                  queryComponents.push(queryComponent);
          }
  
          return queryComponents.join('&');
      },
  
      getElements: function(form) {
          form = $(form);
          var elements = new Array();
  
          for (tagName in Form.Element.Serializers) {
              var tagElements = form.getElementsByTagName(tagName);
              for (var j = 0; j < tagElements.length; j++)
                  elements.push(tagElements[j]);
          }
          return elements;
      },
  
      getInputs: function(form, typeName, name) {
          form = $(form);
          var inputs = form.getElementsByTagName('input');
  
          if (!typeName && !name)
              return inputs;
  
          var matchingInputs = new Array();
          for (var i = 0; i < inputs.length; i++) {
              var input = inputs[i];
              if ((typeName && input.type != typeName) ||
            (name && input.name != name))
                  continue;
              matchingInputs.push(input);
          }
  
          return matchingInputs;
      },
  
      disable: function(form) {
          var elements = Form.getElements(form);
          for (var i = 0; i < elements.length; i++) {
              var element = elements[i];
              element.blur();
              element.disabled = 'true';
          }
      },
  
      enable: function(form) {
          var elements = Form.getElements(form);
          for (var i = 0; i < elements.length; i++) {
              var element = elements[i];
              element.disabled = '';
          }
      },
  
      findFirstElement: function(form) {
          return Form.getElements(form).find(function(element) {
              return element.type != 'hidden' && !element.disabled &&
          ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
          });
      },
  
      focusFirstElement: function(form) {
          Field.activate(Form.findFirstElement(form));
      },
  
      reset: function(form) {
          $(form).reset();
      }
  }
  
  Form.Element = {
      serialize: function(element) {
          element = $(element);
          var method = element.tagName.toLowerCase();
          var parameter = Form.Element.Serializers[method](element);
  
          if (parameter) {
              var key = encodeURIComponent(parameter[0]);
              if (key.length == 0) return;
  
              if (parameter[1].constructor != Array)
                  parameter[1] = [parameter[1]];
  
              return parameter[1].map(function(value) {
                  return key + '=' + encodeURIComponent(value);
              }).join('&');
          }
      },
  
      getValue: function(element) {
          element = $(element);
          var method = element.tagName.toLowerCase();
          var parameter = Form.Element.Serializers[method](element);
  
          if (parameter)
              return parameter[1];
      }
  }
  
  Form.Element.Serializers = {
      input: function(element) {
          switch (element.type.toLowerCase()) {
              case 'submit':
              case 'hidden':
              case 'password':
              case 'text':
                  return Form.Element.Serializers.textarea(element);
              case 'checkbox':
              case 'radio':
                  return Form.Element.Serializers.inputSelector(element);
          }
          return false;
      },
  
      inputSelector: function(element) {
          if (element.checked)
              return [element.name, element.value];
      },
  
      textarea: function(element) {
          return [element.name, element.value];
      },
  
      select: function(element) {
          return Form.Element.Serializers[element.type == 'select-one' ?
        'selectOne' : 'selectMany'](element);
      },
  
      selectOne: function(element) {
          var value = '', opt, index = element.selectedIndex;
          if (index >= 0) {
              opt = element.options[index];
              value = opt.value;
              if (!value && !('value' in opt))
                  value = opt.text;
          }
          return [element.name, value];
      },
  
      selectMany: function(element) {
          var value = new Array();
          for (var i = 0; i < element.length; i++) {
              var opt = element.options[i];
              if (opt.selected) {
                  var optValue = opt.value;
                  if (!optValue && !('value' in opt))
                      optValue = opt.text;
                  value.push(optValue);
              }
          }
          return [element.name, value];
      }
  }
  
  /*--------------------------------------------------------------------------*/
  
  var $F = Form.Element.getValue;
  
  /*--------------------------------------------------------------------------*/
  
  Abstract.TimedObserver = function() { }
  Abstract.TimedObserver.prototype = {
      initialize: function(element, frequency, callback) {
          this.frequency = frequency;
          this.element = $(element);
          this.callback = callback;
  
          this.lastValue = this.getValue();
          this.registerCallback();
      },
  
      registerCallback: function() {
          setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
      },
  
      onTimerEvent: function() {
          var value = this.getValue();
          if (this.lastValue != value) {
              this.callback(this.element, value);
              this.lastValue = value;
          }
      }
  }
  
  Form.Element.Observer = Class.create();
  Form.Element.Observer.prototype = Object.extend(new Abstract.TimedObserver(), {
      getValue: function() {
          return Form.Element.getValue(this.element);
      }
  });
  
  Form.Observer = Class.create();
  Form.Observer.prototype = Object.extend(new Abstract.TimedObserver(), {
      getValue: function() {
          return Form.serialize(this.element);
      }
  });
  
  /*--------------------------------------------------------------------------*/
  
  Abstract.EventObserver = function() { }
  Abstract.EventObserver.prototype = {
      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() {
          var elements = Form.getElements(this.element);
          for (var i = 0; i < elements.length; i++)
              this.registerCallback(elements[i]);
      },
  
      registerCallback: function(element) {
          if (element.type) {
              switch (element.type.toLowerCase()) {
                  case 'checkbox':
                  case 'radio':
                      Event.observe(element, 'click', this.onElementEvent.bind(this));
                      break;
                  case 'password':
                  case 'text':
                  case 'textarea':
                  case 'select-one':
                  case 'select-multiple':
                      Event.observe(element, 'change', this.onElementEvent.bind(this));
                      break;
              }
          }
      }
  }
  
  Form.Element.EventObserver = Class.create();
  Form.Element.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {
      getValue: function() {
          return Form.Element.getValue(this.element);
      }
  });
  
  Form.EventObserver = Class.create();
  Form.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {
      getValue: function() {
          return Form.serialize(this.element);
      }
  });
  if (!window.Event) {
      var Event = new Object();
  }
  
  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,
  
      element: function(event) {
          return event.target || event.srcElement;
      },
  
      isLeftClick: function(event) {
          return (((event.which) && (event.which == 1)) ||
              ((event.button) && (event.button == 1)));
      },
  
      pointerX: function(event) {
          return event.pageX || (event.clientX +
        (document.documentElement.scrollLeft || document.body.scrollLeft));
      },
  
      pointerY: function(event) {
          return event.pageY || (event.clientY +
        (document.documentElement.scrollTop || document.body.scrollTop));
      },
  
      stop: function(event) {
          if (event.preventDefault) {
              event.preventDefault();
              event.stopPropagation();
          } else {
              event.returnValue = false;
              event.cancelBubble = true;
          }
      },
  
      // find the first node with the given tagName, starting from the
      // node the event was triggered on; traverses the DOM upwards
      findElement: function(event, tagName) {
          var element = Event.element(event);
          while (element.parentNode && (!element.tagName ||
          (element.tagName.toUpperCase() != tagName.toUpperCase())))
              element = element.parentNode;
          return element;
      },
  
      observers: false,
  
      _observeAndCache: function(element, name, observer, useCapture) {
          if (!this.observers) this.observers = [];
          if (element.addEventListener) {
              this.observers.push([element, name, observer, useCapture]);
              element.addEventListener(name, observer, useCapture);
          } else if (element.attachEvent) {
              this.observers.push([element, name, observer, useCapture]);
              element.attachEvent('on' + name, observer);
          }
      },
  
      unloadCache: function() {
          if (!Event.observers) return;
          for (var i = 0; i < Event.observers.length; i++) {
              Event.stopObserving.apply(this, Event.observers[i]);
              Event.observers[i][0] = null;
          }
          Event.observers = false;
      },
  
      observe: function(element, name, observer, useCapture) {
          var element = $(element);
          useCapture = useCapture || false;
  
          if (name == 'keypress' &&
          (navigator.appVersion.match(/Konqueror|Safari|KHTML/)
          || element.attachEvent))
              name = 'keydown';
  
          this._observeAndCache(element, name, observer, useCapture);
      },
  
      stopObserving: function(element, name, observer, useCapture) {
          var element = $(element);
          useCapture = useCapture || false;
  
          if (name == 'keypress' &&
          (navigator.appVersion.match(/Konqueror|Safari|KHTML/)
          || element.detachEvent))
              name = 'keydown';
  
          if (element.removeEventListener) {
              element.removeEventListener(name, observer, useCapture);
          } else if (element.detachEvent) {
              element.detachEvent('on' + name, observer);
          }
      }
  });
  
  /* prevent memory leaks in IE */
  Event.observe(window, 'unload', Event.unloadCache, false);
  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;
      },
  
      realOffset: function(element) {
          var valueT = 0, valueL = 0;
          do {
              valueT += element.scrollTop || 0;
              valueL += element.scrollLeft || 0;
              element = element.parentNode;
          } while (element);
          return [valueL, valueT];
      },
  
      cumulativeOffset: function(element) {
          var valueT = 0, valueL = 0;
          do {
              valueT += element.offsetTop || 0;
              valueL += element.offsetLeft || 0;
              element = element.offsetParent;
          } while (element);
          return [valueL, valueT];
      },
  
      positionedOffset: function(element) {
          var valueT = 0, valueL = 0;
          do {
              valueT += element.offsetTop || 0;
              valueL += element.offsetLeft || 0;
              element = element.offsetParent;
              if (element) {
                  p = Element.getStyle(element, 'position');
                  if (p == 'relative' || p == 'absolute') break;
              }
          } while (element);
          return [valueL, valueT];
      },
  
      offsetParent: 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;
      },
  
      // 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 = this.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 = this.realOffset(element);
  
          this.xcomp = x + offsetcache[0] - this.deltaX;
          this.ycomp = y + offsetcache[1] - this.deltaY;
          this.offset = this.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;
      },
  
      clone: function(source, target) {
          source = $(source);
          target = $(target);
          target.style.position = 'absolute';
          var offsets = this.cumulativeOffset(source);
          target.style.top = offsets[1] + 'px';
          target.style.left = offsets[0] + 'px';
          target.style.width = source.offsetWidth + 'px';
          target.style.height = source.offsetHeight + 'px';
      },
  
      page: 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)
                  if (Element.getStyle(element, 'position') == 'absolute') break;
  
          } while (element = element.offsetParent);
  
          element = forElement;
          do {
              valueT -= element.scrollTop || 0;
              valueL -= element.scrollLeft || 0;
          } while (element = element.parentNode);
  
          return [valueL, valueT];
      },
  
      clone: function(source, target) {
          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 = Position.page(source);
  
          // find coordinate system to use
          target = $(target);
          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(target, 'position') == 'absolute') {
              parent = Position.offsetParent(target);
              delta = Position.page(parent);
          }
  
          // 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) target.style.left = (p[0] - delta[0] + options.offsetLeft) + 'px';
          if (options.setTop) target.style.top = (p[1] - delta[1] + options.offsetTop) + 'px';
          if (options.setWidth) target.style.width = source.offsetWidth + 'px';
          if (options.setHeight) target.style.height = source.offsetHeight + 'px';
      },
  
      absolutize: function(element) {
          element = $(element);
          if (element.style.position == 'absolute') return;
          Position.prepare();
  
          var offsets = Position.positionedOffset(element);
          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'; ;
      },
  
      relativize: function(element) {
          element = $(element);
          if (element.style.position == 'relative') return;
          Position.prepare();
  
          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;
      }
  }
  
  // Safari returns margins on body which is incorrect if the child is absolutely
  // positioned.  For performance reasons, redefine Position.cumulativeOffset for
  // KHTML/WebKit only.
  if (/Konqueror|Safari|KHTML/.test(navigator.userAgent)) {
      Position.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 [valueL, valueT];
      }
  }