为什么在谷歌里没有数据显示呀，我都快风了，JS调用数据？

       各位高手们，出来帮帮忙呀？   
JS
      function callServer() 
        {
                  
           var url = "PageName.aspx?Id=" + escape("zx");
           
          xmlHttp.open("POST", url, true);
         xmlHttp.onreadystatechange = updatePage;
         xmlHttp.send(null);  
          //xmlHttp.onreadystatechange=updatePage;
       //   xmlHttp.open('POST',url,true);
           //  xmlHttp.setRequestHeader('Content-Length',args.data.length);//post提交是要加这两行，好像上面这一行可以省略，
           //  xmlHttp.setRequestHeader('Content-Type','application/x-www-form-urlencoded');
          //  xmlHttp.send("Id=" + escape("zx"));//post提交时参数要放在这里        }
         if (!xmlHttp && typeof XMLHttpRequest != 'undefined') 
        {
           xmlHttp = new XMLHttpRequest();
        }
        function updatePage() 
        {
       // xmlHttp.setRequestHeader("Connection", "close");           //  if (xmlHttp.readyState == 4) 
            if(xmlHttp.readyState == 4 && xmlHttp.status == 200)
               {
                                    var response = xmlHttp.responseText;  
                    // test1.innerHTML=response;              
                    //alert(response);
                   document.getElementById('test1').innerHTML=response;
                    
               }
        }  
显示
<span style="padding:0 2px 0 2px; font-size:10pt; font-weight:bolder;" id="test1" class="xiahuaxian"> </span>