evalResponse: function() {
    try {
      return eval(this.transport.responseText);
    } catch (e) {
      this.dispatchException(e);
    }
  },
  /**
   * 回调函数定义在 this.options 属性中，比如:
      var option = {
         onLoaded : function(req) {...};
         ......
      }
      new Ajax.Request(url, option);
   */
  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);
    }
    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 用于绑定一个html元素与 XmlHttp调用的返回值。类似与 buffalo 的 bind。
* 如果 options 中有 insertion(from dom.js) 对象的话, insertion 能提供更多的插入控制。
*/
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);

[ 本帖最后由 华人帮 于 2007-7-9 21:24 编辑 ]

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);
  }
});
/**
* 这个函数就 Ruby 了。我觉得它的作用主要有两个
* 1.  大概是 document.getElementById(id) 的最简化调用。
* 比如：$("aaa") 将返回上 aaa 对象

[ 本帖最后由 华人帮 于 2007-7-9 21:25 编辑 ]

* 2.  得到对象数组
* 比如: $("aaa","bbb") 返回一个包括id为"aaa"和"bbb"两个input控件对象的数组。
*/
function $() {
  var results = [], element;
  for (var i = 0; i < arguments.length; i++) {
    element = arguments;
    if (typeof element == 'string')
      element = document.getElementById(element);
    results.push(Element.extend(element));
  }
  return results.length < 2 ? results[0] : results;
}document.getElementsByClassName = function(className, parentElement) {
  var children = ($(parentElement) || document.body).getElementsByTagName('*');
  return $A(children).inject([], function(elements, child) {
    if (child.className.match(new RegExp("(^|\\s)" + className + "([url=file:///s|$]\\s|$[/url])")))
      elements.push(Element.extend(child));
    return elements;
  });
}
/*--------------------------------------------------------------------------*/
if (!window.Element)
  var Element = new Object();
Element.extend = function(element) {
  if (!element) return;
  if (_nativeExtensions) return element;
  if (!element._extended && element.tagName && element != window) {
    var methods = Element.Methods, cache = Element.extend.cache;
    for (property in methods) {
      var value = methods[property];
      if (typeof value == 'function')
        element[property] = cache.findOrStore(value);
    }
  }
  element._extended = true;
  return element;
}
Element.extend.cache = {
  findOrStore: function(value) {
    return this[value] = this[value] || function() {
      return value.apply(null, [this].concat($A(arguments)));
    }
  }
}
Element.Methods = {
  visible: function(element) {
    return $(element).style.display != 'none';
  },
  toggle: function() {
    for (var i = 0; i < arguments.length; i++) {
      var element = $(arguments);
      Element[Element.visible(element) ? 'hide' : 'show'](element);
    }
  },
  hide: function() {
    for (var i = 0; i < arguments.length; i++) {
      var element = $(arguments);
      element.style.display = 'none';
    }
  },
  show: function() {
    for (var i = 0; i < arguments.length; i++) {
      var element = $(arguments);
      element.style.display = '';
    }
  },
  remove: function(element) {
    element = $(element);
    element.parentNode.removeChild(element);
  },
  update: function(element, html) {

[ 本帖最后由 华人帮 于 2007-7-9 21:25 编辑 ]

$(element).innerHTML = html.stripScripts();
    setTimeout(function() {html.evalScripts()}, 10);
  },  replace: function(element, html) {
    element = $(element);
    if (element.outerHTML) {
      element.outerHTML = html.stripScripts();
    } else {
      var range = element.ownerDocument.createRange();
      range.selectNodeContents(element);
      element.parentNode.replaceChild(
        range.createContextualFragment(html.stripScripts()), element);
    }
    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;
      if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
        Element.remove(node);
    }
  },
  empty: function(element) {
    return $(element).innerHTML.match(/^\s*$/);
  },
  childOf: function(element, ancestor) {
    element = $(element), ancestor = $(ancestor);
    while (element = element.parentNode)
      if (element == ancestor) return true;
    return false;
  },
  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);

[ 本帖最后由 华人帮 于 2007-7-9 21:25 编辑 ]

        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 (var 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};
    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';
      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;
  }
}
Object.extend(Element, Element.Methods);
var _nativeExtensions = false;
if(!HTMLElement && /Konqueror|Safari|KHTML/.test(navigator.userAgent)) {
  var HTMLElement = {}
  HTMLElement.prototype = document.createElement('div').__proto__;
}
Element.addMethods = function(methods) {
  Object.extend(Element.Methods, methods || {});
  if(typeof HTMLElement != 'undefined') {
    var methods = Element.Methods, cache = Element.extend.cache;
    for (property in methods) {
      var value = methods[property];
      if (typeof value == 'function')
        HTMLElement.prototype[property] = cache.findOrStore(value);
    }
    _nativeExtensions = true;
  }
}
Element.addMethods();
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) {
        var tagName = this.element.tagName.toLowerCase();
        if (tagName == 'tbody' || tagName == 'tr') {
          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 Selector = Class.create();
Selector.prototype = {
  initialize: function(expression) {
    this.params = {classNames: []};
    this.expression = expression.toString().strip();
    this.parseExpression();
    this.compileMatcher();
  },
  parseExpression: function() {
    function abort(message) { throw 'Parse error in selector: ' + message; }
    if (this.expression == '')  abort('empty expression');
    var params = this.params, expr = this.expression, match, modifier, clause, rest;
    while (match = expr.match(/^(.*)\[([a-z0-9_:-]+?)(?[~\|!]?=)(?:"([^"]*)"|([^\]\s]*)))?\]$/i)) {
      params.attributes = params.attributes || [];
      params.attributes.push({name: match[2], operator: match[3], value: match[4] || match[5] || ''});
      expr = match[1];
    }
    if (expr == '*') return this.params.wildcard = true;
    while (match = expr.match(/^([^a-z0-9_-])?([a-z0-9_-]+)(.*)/i)) {
      modifier = match[1], clause = match[2], rest = match[3];
      switch (modifier) {
        case '#':       params.id = clause; break;
        case '.':       params.classNames.push(clause); break;
        case '':
        case undefined: params.tagName = clause.toUpperCase(); break;
        default:        abort(expr.inspect());
      }
      expr = rest;
    }
    if (expr.length > 0) abort(expr.inspect());
  },
  buildMatchExpression: function() {
    var params = this.params, conditions = [], clause;
    if (params.wildcard)
      conditions.push('true');
    if (clause = params.id)
      conditions.push('element.id == ' + clause.inspect());
    if (clause = params.tagName)
      conditions.push('element.tagName.toUpperCase() == ' + clause.inspect());
    if ((clause = params.classNames).length > 0)
      for (var i = 0; i < clause.length; i++)
        conditions.push('Element.hasClassName(element, ' + clause.inspect() + ')');
    if (clause = params.attributes) {
      clause.each(function(attribute) {
        var value = 'element.getAttribute(' + attribute.name.inspect() + ')';

[ 本帖最后由 华人帮 于 2007-7-9 21:26 编辑 ]

var splitValueBy = function(delimiter) {
          return value + ' && ' + value + '.split(' + delimiter.inspect() + ')';
        }        switch (attribute.operator) {
          case '=':       conditions.push(value + ' == ' + attribute.value.inspect()); break;
          case '~=':      conditions.push(splitValueBy(' ') + '.include(' + attribute.value.inspect() + ')'); break;
          case '|=':      conditions.push(
                            splitValueBy('-') + '.first().toUpperCase() == ' + attribute.value.toUpperCase().inspect()
                          ); break;
          case '!=':      conditions.push(value + ' != ' + attribute.value.inspect()); break;
          case '':
          case undefined: conditions.push(value + ' != null'); break;
          default:        throw 'Unknown operator ' + attribute.operator + ' in selector';
        }
      });
    }
    return conditions.join(' && ');
  },
  compileMatcher: function() {
    this.match = new Function('element', 'if (!element.tagName) return false; \
      return ' + this.buildMatchExpression());
  },
  findElements: function(scope) {
    var element;
    if (element = $(this.params.id))
      if (this.match(element))
        if (!scope || Element.childOf(element, scope))
          return [element];
    scope = (scope || document).getElementsByTagName(this.params.tagName || '*');
    var results = [];
    for (var i = 0; i < scope.length; i++)
      if (this.match(element = scope))
        results.push(Element.extend(element));
    return results;
  },
  toString: function() {
    return this.expression;
  }
}
function $$() {
  return $A(arguments).map(function(expression) {
    return expression.strip().split(/\s+/).inject([null], function(results, expr) {

[ 本帖最后由 华人帮 于 2007-7-9 21:27 编辑 ]

var selector = new Selector(expr);
      return results.map(selector.findElements.bind(selector)).flatten();
    });
  }).flatten();
}/**
* 针对 页面元素对象 的工具类，提供一些简单静态方法
*/
var Field = {
/**
   * 清除参数引用对象的值
   */
  clear: function() {
    for (var i = 0; i < arguments.length; i++)
      $(arguments).value = '';
  },
  /**
   * 使参数引用对象获取焦点
   */
  focus: function(element) {
    $(element).focus();
  },
  /**
   * 判断参数引用对象值是否为空，如为空，返回false, 反之true
   */
  present: function() {
    for (var i = 0; i < arguments.length; i++)
      if ($(arguments).value == '') return false;
    return true;
  },
  /**
   * 使选中参数引用对象
   */
  select: function(element) {
    $(element).select();
  },
  /**
   * 使参数引用对象处于可编辑状态
   */
  activate: function(element) {
    element = $(element);
    element.focus();
    if (element.select)
      element.select();
  }
}
/*--------------------------------------------------------------------------*/
/**
* 表单工具类
*/
var Form = {
/**
   * 将表单元素序列化后的值组合成 QueryString 的形式
   */
  serialize: function(form) {
    var elements = Form.getElements($(form));
    var queryComponents = new Array();
    for (var i = 0; i < elements.length; i++) {
      var queryComponent = Form.Element.serialize(elements);
      if (queryComponent)
        queryComponents.push(queryComponent);
    }
    return queryComponents.join('&');
  },
  /**
   * 得到表单的所有元素对象
   */
  getElements: function(form) {
    form = $(form);
    var elements = new Array();
    for (var 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++) {

[ 本帖最后由 华人帮 于 2007-7-9 21:27 编辑 ]