//AJAX

function ajaxRequest(url,divid,loaderid,tabid)
{ 
if (document.getElementById("tab"+tabid).className == "navigator_button") {document.getElementById(loaderid).innerHTML = "<img src=img/loader.gif>";}
 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;   
	document.getElementById(loaderid).innerHTML = "";
	for (x=1;x<=5;x++) {document.getElementById("tab"+x).className = "navigator_button";}
	document.getElementById("tab"+tabid).className = "navigator_button_selected";
   }
   else
   {
    alert("Error: "+ AJAX.statusText +" "+ AJAX.status);
	document.getElementById(loaderid).innerHTML = "";
   }
  }   
 }
 AJAX.open("post", encodeURI(url), true);
 AJAX.send(null);
}