CodeObject.extend =function(targetObj,fnJson){    //扩展方法，类似于jQuery的$.extend,可以扩展类的方法，也可以合并对象    for(var fnName in fnJson){        targetObj[fnName]=fnJson[fnName];    }    return targetObj;};HttpAjax = (function(){    function HttpAjax(options){        var settings={            type:‘post‘,        //请求类型            url:‘‘,             //请求地址            data:{"id":-1},     //json格式的参数            success:function(){},//成功的回调函数            failure:function(){},//失败的回调函数            isAsyn:true           //是否为异步        };        this.options = Object.extend(settings,options);        Object.extend(HttpAjax.prototype,{            _createXhr:function(){                if (typeof XMLHttpRequest !== ‘undefined‘) {                    return new XMLHttpRequest();                }                else if (typeof ActiveXObject !== ‘undefined‘) {                    var versions = [‘MSXML2.XMLHttp.6.0‘, ‘MSXML2.XMLHttp.3.0‘, ‘MSXML2.XMLHttp‘];                    for (var i = 0, len = versions.length; i < len; i++) {                        try {                            var xhr = new ActiveXObject(versions[i]);                            this.IsCreateOk = versions[i];                            return xhr;                        }                        catch (e) { }                    }                    if (typeof this.IsCreateOk === ‘undefined‘) {                        throw new Error("您的浏览器版本过低，无法创建异步对象，请升级您的浏览器！");                    }                }            },            _encodeData:function(paramters){                var data = http://www.mamicode.com/[];"color: #0000ff">for (var name in paramters) {                    //将数组中的数据以=拼接后再添加到data数组中 [name=aa,age=11]                    var _regesp = /%20/g; //空格的正则表达式                    var _value = http://www.mamicode.com/paramters[name].toString(); //获取值                    data.push(encodeURIComponent(name).replace(_regesp, ‘+‘) + "=" + encodeURIComponent(_value).replace(_regesp, ‘+‘));                }                //以&将数组元素拼接后返回 如：name=aa&age=11                return data.join("&");            },            _regCallback:function(xhr){                var _this=this;                xhr.onreadystatechange = function(){                    if (xhr.readyState == 4) {                        if (xhr.status >= 200 && xhr.status < 300 || xhr.status == 300) {                            _this.options.success(_this._getResponseData(xhr), xhr.statusText);                        } else {                            _this.options.failure(xhr.status, xhr.statusText);                        }                    }                }            },            _getResponseData:function(xhr){                var responseType = xhr.getResponseHeader("Content-Type");                switch (responseType) {                    case ‘text/xml‘:                        return xhr.responseXML;                    case ‘text/json‘:                    case ‘text/javascript‘:                    case ‘application/javascript‘:                    case ‘application/x-javascript‘:                        return eval(‘(‘ + xhr.responseText + ‘)‘);                    default:                        return xhr.responseText;                };            },            _init:function(options){                this.options=options;                if(this.options.url=="") return;                this.xhr = this._createXhr();//创建异步对象                this._regCallback(this.xhr);//注册回调事件                //根据请求类型，发送异步请求                if(this.options.type.toLowerCase()=="post"){                    this._post(this.xhr);                }                else{                    this._get(this.xhr);                }            },            _post:function(xhr){                this.xhr=xhr;                this.data=http://www.mamicode.com/this._encodeData(this.options.data);                this.url=this.options.url+"?d=" + parseInt(Math.random()*100+1,10);                this.asyn=!!this.options.isAsyn;                xhr.open("POST", this.url, this.asyn);                xhr.setRequestHeader("Content-Type", "application/x-www-form-urlencoded");                xhr.send(this.data);            },            _get:function(xhr){                this.xhr=xhr;                this.data=http://www.mamicode.com/this._encodeData(this.options.data);                this.url=this.options.url+‘?‘ + this.data + ‘&d=‘ + parseInt(Math.random()*100+1,10);                this.asyn=!!this.options.isAsyn;                xhr.open(‘GET‘, this.url, this.asyn);                xhr.send(null);            }        });       this._init(this.options);    };    return HttpAjax;})(window);