Ajax get和Post的纯js实现代码

来源：互联网发布：手机淘宝详情页怎么做编辑：程序博客网时间：2024/05/23 22:28
<span style="font-size:18px;">//AJAX类function AjaxClass(){    var XmlHttp = false;    try    {        XmlHttp = new XMLHttpRequest();        //FireFox专有    }    catch(e)    {        try        {            XmlHttp = new ActiveXObject("MSXML2.XMLHTTP");        }        catch(e2)        {            try            {                XmlHttp = new ActiveXObject("Microsoft.XMLHTTP");            }            catch(e3)            {                alert("你的浏览器不支持XMLHTTP对象，请升级到IE6以上版本！");                XmlHttp = false;            }        }    }    var me = this;    this.Method = "POST";    this.Url = "";    this.Async = true;    this.Arg = "";    this.CallBack = function(){};    this.Loading = function(){};        this.Send = function()    {        if (this.Url=="")        {            return false;        }        if (!XmlHttp)        {            return IframePost();        }        XmlHttp.open (this.Method, this.Url, this.Async);        if (this.Method=="POST")        {            XmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");        }        XmlHttp.onreadystatechange = function()        {            if (XmlHttp.readyState==4)            {                var Result = false;                if (XmlHttp.status==200)                {                    Result = XmlHttp.responseText;                }                XmlHttp = null;                                me.CallBack(Result);            }             else             {me.Loading();             }        }        if (this.Method=="POST")        {            XmlHttp.send(this.Arg);        }        else        {            XmlHttp.send(null);        }    }        //Iframe方式提交    function IframePost()    {        var Num = 0;        var obj = document.createElement("iframe");        obj.attachEvent("onload",function(){ me.CallBack(obj.contentWindow.document.body.innerHTML); obj.removeNode() });        obj.attachEvent("onreadystatechange",function(){ if (Num>=5) {alert(false);obj.removeNode()} });        obj.src = me.Url;        obj.style.display = 'none';        document.body.appendChild(obj);    }}/*----------------------------调用方法------------------------------    var Ajax = new AjaxClass();// 创建AJAX对象    Ajax.Method = "POST"; // 设置请求方式为POST    Ajax.Url = "default.asp"// URL为default.asp    Ajax.Async = true;// 是否异步    Ajax.Arg = "a=1&b=2";// POST的参数    Ajax.Loading = function(){//等待函数document.write("loading...");    }    Ajax.CallBack = function(str)       // 回调函数    {        document.write(str);    }    Ajax.Send();            // 发送请求   -----------------------------------------------------------    var Ajax = new AjaxClass();// 创建AJAX对象    Ajax.Method = "GET"; // 设置请求方式为POST    Ajax.Url = "default.asp?a=1&b=2"// URL为default.asp    Ajax.Async = true;// 是否异步    Ajax.Loading = function(){//等待函数document.write("loading...");    }    Ajax.CallBack = function(str)       // 回调函数    {        document.write(str);    }    Ajax.Send();           // 发送请求--------------------------------------------------------------------*/ </span>
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