ตัว ajax chat ถ้าปรับไปใช้กับ asp + ms access จะต้องปรับตรงไหนคะถึงจะแสดงผล

<script language="JavaScript">
     var HttPRequest = false;

    function doCallAjax() {
         HttPRequest = false;
        if (window.XMLHttpRequest) { // Mozilla, Safari,...
           HttPRequest = new XMLHttpRequest();
           if (HttPRequest.overrideMimeType) {
             HttPRequest.overrideMimeType('text/html');
            }
      } else if (window.ActiveXObject) { // IE
         try {
              HttPRequest = new ActiveXObject("Msxml2.XMLHTTP");
            } catch (e) {
             try {
                 HttPRequest = new ActiveXObject("Microsoft.XMLHTTP");
              } catch (e) {}
         }
        }
         
        if (!HttPRequest) {
        alert('Cannot create XMLHTTP instance');
        return false;
         }
   
     var url = 'ajaxchat.asp';
       var pmeters = "tName=" + encodeURI( document.getElementById("txtName").value) +
                     "&tMessage=" + encodeURI( document.getElementById("txtMessage").value );

         HttPRequest.open('POST',url,true);

          HttPRequest.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
          HttPRequest.setRequestHeader("Content-length", pmeters.length);
          HttPRequest.setRequestHeader("Connection", "close");
        HttPRequest.send(pmeters);
      
         
         HttPRequest.onreadystatechange = function()
       {

              if(HttPRequest.readyState == 3)  // Loading Request
                {
                document.getElementById("mySpan").innerHTML = "Now is Loading...";
             }

        if(HttPRequest.readyState == 4) // Return Request
             {          
                document.getElementById('mySpan').innerHTML = HttPRequest.responseText;
                       
                   //  focus //
                     var el = document.getElementById('mydiv');
                       el.tabIndex = 32456;
                    el.focus();
  
               }            
           }

     }
 </script>

<%
  Dim strName,strMessage,strFileName
  strName = Request.Form("tName")
 strMessage = Request.Form("tMessage")
   

   strFileName = "ctrlschoolmsgbox.txt"
  Dim objFSO, objStream
   Set objFSO = Server.CreateObject("Scripting.FileSystemObject")
    
 '*** Write Text file ***'
  If strName <> "" and strMessage <> "" Then
 Set objStream = objFSO.OpenTextFile(Server.MapPath(""&strFileName), 8, True)  
  objStream.WriteLine(strName & " say : " & strMessage)
    objStream.Close
   End IF

   '*** Read Text file ***'
   Set objStream = objFSO.OpenTextFile(Server.MapPath(""&strFileName))
    Do Until objStream.AtEndOfStream
  Response.Write objStream.ReadLine & "<br>"
  Loop
  objStream.Close

   Set objStream = Nothing
   Set objFSO = Nothing



  Response.write("<div id='mydiv'></div>")
%>