【分享】一套我自己写的AJAX实现方案

var Ajax = {

    GetXmlHttp : function () {

        var xmlHttp = null;

        try {

            xmlHttp = new XMLHttpRequest();

        } catch (e) {

            try {

                xmlHttp = new ActiveXObject('Msxml2.XMLHTTP');

            } catch (ee) {

                xmlHttp = new ActiveXObject('Microsoft.XMLHTTP');

            }

        }

        return xmlHttp;

    },

    

    Process : function (ajaxInfo, processFun) {

         var xmlObj = Ajax.GetXmlHttp();

         if (!xmlObj) {

            alert("抱歉，你的浏览器不支持AJAX。");

            return;

         }

         

         var method = ajaxInfo.Method.toUpperCase();

         var data = null;

         xmlObj.open(method, ajaxInfo.Url, true);

         if (method == "POST") {

            data = ajaxInfo.Data;

            xmlObj.setRequestHeader("Content-Length", data.Length());  

            xmlObj.setRequestHeader("CONTENT-TYPE", "application/x-www-form-urlencoded");

         }

         xmlObj.send(data);

         

         xmlObj.onreadystatechange = function () {

            if (xmlObj.readyState == 4) {

                if (xmlObj.status == 200) {

                    var type = ajaxInfo.Type.toUpperCase();

                    if (type == "TEXT") {

                        processFun(xmlObj.responseText);

                    } else if (type == "XML") {

                        processFun(xmlObj.responseXML);

                    } else {

                        alert("无法识别的返回方式");

                    }

                    xmlObj = null;

                }

            }

         };

    }

}

        public void ProcessRequest(HttpContext context)

        {

            HttpResponse response = context.Response;



            response.Write("{ data:'testData', Url:'testUrl', User:{ Name:'IceCoffee', Age:26 } }");

            response.End();

        }

<script language="javascript" type="text/javascript">

<!--

    //var postData = "userName=abc&userPass=123";

    //var request = { Method:"POST", Url:"data.ashx?rnd=" + Math.random(), Data:postData, Type:"TEXT" };//注释的部分是POST调用方式，下面是GET调用方式

    var request = { Method:"GET", Url:"data.ashx?rnd=" + Math.random(), Data:null, Type:"TEXT" };

    Ajax.Process(request, function (data) {

        var jason = "var obj = " + data + ";";

        eval(jason);        

        alert(obj.User.Name);

    });

//-->

</script>