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;             
     }                                                                                                  
   }                                                                                                    
 }