function ajaxpage(Url,DivId,callback)
{
 var AJAX;
 try
 {  
  AJAX = new XMLHttpRequest(); 
 }
 catch(e)
 {  
  try
  {    
   AJAX = new ActiveXObject("Msxml2.XMLHTTP");    
  }
  catch(e)
  {    
   try
   {
    AJAX = new ActiveXObject("Microsoft.XMLHTTP");      
   }
   catch(e)
   {      
    alert("Your browser does not support AJAX.");      
    return false;      
   }    
  }  
 }
 AJAX.onreadystatechange = function()
 {
  if(AJAX.readyState == 4)
  {
   if(AJAX.status == 200)
   {
    document.getElementById(DivId).innerHTML = AJAX.responseText;  
    callback();
   }
   else
   {
    alert("Error: "+ AJAX.statusText +" "+ AJAX.status);
   }
  }  
 }
 AJAX.open("get", Url, true);
 AJAX.send(null);
}