$(document).ready(function() {    $.ajax({        url : "/AjaxAction/LoginArea.ashx",        data : {username:user,password:pwd},        type : "POST",        //dataType:"json",        beforeSend: function(XMLHttpRequest){alert("开始请求")}, //加载过程        success : function(data){alert(data);},        complete: function(XMLHttpRequest, textStatus){alert("加载结束")},//HideLoading()加载完成;        error:function(){alert("error occured!!!");} //请求出错处理            });});