XMLHttpRequest IHttpHandler二

        var introId=document.getElementById("txtIntroId").value;
        var request;
        try
        {  
            request = new ActiveXObject("Msxml2.XMLHTTP");
        }
        catch(e)
        {
           try
           {
                request = new ActiveXObject("Microsoft.XMLHTTP");
           }
           catch(e)
           {
                try
                {
                }
                catch(e)
                {
                    request = new XMLHttpRequest();
                }
           }
        }
        request.open("post","../Handler.ashx",true);
        request.setRequestHeader("Content-Type","application/x-www-form-urlencoded;"); //设置编码
        request.send("userId="+introId);
        request.onreadystatechange=function()
        {
            if(request.readyState==4)
            {
               if(request.responseText=="0")
               {
                document.getElementById('msg_IntroId').innerHTML="介绍人会员编号输入有误";
               }
               else
               {
                document.getElementById('msg_IntroId').innerHTML="介绍人会员编号可用";
               }
            }
        }