function getXMLHTTPRequest() 
{
var request = false;
try 
  {
    request = new XMLHttpRequest(); /* e.g. Firefox */
  } 
catch(err1) 
  {
  try 
    {
    request = new ActiveXObject("Msxml2.XMLHTTP");  /* some versions IE */
    } 
  catch(err2) 
    {
    try 
      {
      request = new ActiveXObject("Microsoft.XMLHTTP");  /* some versions IE */
      } 
      catch(err3) 
        {
        request = false;
        } 
    } 
  }
return request;
}
var req = getXMLHTTPRequest();

function callAjax(url, pageElement) {

	// generate a random number
	var myRandom=parseInt(Math.random()*99999999);

	// ask our XMLHTTPRequest object to open a server connection
	req.open("GET", url, false);
	// prepare a function responseAjax() to run when the response has arrived
	req.onreadystatechange = function() {responseAjax(pageElement);};
	// and finally send the request
	req.send(null);
}


function responseAjax(pageElement) {
   var output = '';
   if(req.readyState == 4) {
      if(req.status == 200) {
         output = req.responseText;
         document.all[pageElement].innerHTML = output;
         }
	else{
		alert("Error " +req.status);
		}
      }
}