代码如下:         var xmlHttp = false;
        try{
        xmlHttp = new XMLHttpRequest;
    }
    catch(e)
    {
        try 
        {
            xmlHttp = new ActiveXObject("Msxml2.XMLHTTP");
        } 
        catch (e1) 
        {
           try 
           {
             xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
           } 
           catch (e2) 
           {
             xmlHttp = false;
           }
        }
        }       function callServer() 
        {
                  
           var url = "PageName.aspx?Id=" + escape("zx");
           
        xmlHttp.open("POST", url, true);
        
         xmlHttp.setRequestHeader('Content-type','application/x-www-form-urlencoded;charset=UTF-8');
        
          xmlHttp.onreadystatechange=updatePage;
     
          xmlHttp.send("Id=" + escape("zx"));//post提交时参数要放在这里       }
 
      function updatePage() 
       {
 
      if(xmlHttp.readyState==4)
             {
         if(xmlHttp.status==200)
               {
                                    var response = xmlHttp.responseText;  
                     test1.innerHTML=response;  
                   document.getElementById("test1").innerHTML=response;
               
                    
               }
            
            }
     }