function callAjax(url, pageElement, callMessage) {
 document.getElementById(pageElement).innerHTML = callMessage;
 try {
 req = new XMLHttpRequest(); /* e.g. Firefox */
 } catch(e) {
 try {
 req = new ActiveXObject("Msxml2.XMLHTTP");
 /* some versions IE */
 } catch (e) {
 try {
 req = new ActiveXObject("Microsoft.XMLHTTP");

 /* some versions IE */
 } catch (E) {
 req = false;
 }
 }
 }

 req.onreadystatechange = function() {responseAjax(pageElement);};
 req.open("GET",url,true);
 req.send(null);
 }

 function responseAjax(pageElement) {
 var output = '';
 if(req.readyState == 4) {
 if(req.status == 200) {
 output = req.responseText;
 document.getElementById(pageElement).innerHTML = output;
 }
 }
 }