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var OverWritingDemonstrate=Class.create();

OverWritingDemonstrate.prototype={

    xml_source:'',

    initialize:function(){

    },

    putRequest:function(url,params,callBackFunction){

       var funcHolder=arguments.callee.$;

        var xmlHttp = new Ajax.Request(url,

           {

              method: 'get',

                   parameters: params,

              requestHeaders:['my-header-encoding','utf-8'],

                   onFailure: function(){

                  alert('对不起，网络通讯失败，请重新刷新！');

              },

              onSuccess: function(transport){

              },

              onComplete: function(transport){

                  this.xml_source=transport.responseText;

                  this.showXMLResponse();

              }

           });

    },

    //显示xml信息

    showXMLResponse:function(){

       alert(this.xml_source);

    },

    …

}

//类工具

var ClassUtils=Class.create();

ClassUtils.prototype={

    _ClassUtilsName:'ClassUtils',

    initialize:function(){

    },

    /**

     * 给类的每个方法注册一个对类对象的自我引用

     * @param reference 对类对象的引用

     */

    registerFuncSelfLink:function(reference){

       for (var n in reference) {

        var item = reference[n];                       

        if (item instanceof Function)

              item.$ = reference;

    }

    }

}

//Ajax操作封装类：

//由于调用AjaxRequest类进行XMLHTTPRequest操作时，this引用（指向当前的对象）会出现了call stack问题，从而指向当前的对象。

//所以，对putRequest、callBackHandler、以及callback方法都要使用arguments.callee.$来获得正确的类对象引用

var AjaxWrapper=Class.create();

AjaxWrapper.prototype={

    xml_source:'',

    /**

     * 初始化

     * @param isDebug 是否显示调试信息

     */

    initialize:function(isDebug){

       new ClassUtils().registerFuncSelfLink(this);

    },

    putRequest:function(url,params,callBackFunction){

       var funcHolder=arguments.callee.$;

        var xmlHttp = new Ajax.Request(url,

           {

              method: 'get',

                parameters: params,

              requestHeaders:['my-header-encoding','utf-8'],

                onFailure: function(){

                  alert('对不起，网络通讯失败，请重新刷新！');

              },

              onSuccess: function(transport){

              },

              onComplete: function(transport){

                  funcHolder.xml_source=transport.responseText;

                  funcHolder.showXMLResponse();

              }

           });

    },

    //显示xml信息

    showXMLResponse:function(){

       alert(funcHolder.xml_source);

    },

    …

}