//Global AJAX functions
//-------------------------------------------

//Check if browser is AJAX compatible
function GetXmlHttpObject()
{
 var xmlHttp=null;
 try
  {xmlHttp=new XMLHttpRequest();}  // Firefox, Opera 8.0+, Safari
  catch (e)
  {
  try  // Internet Explorer
   {xmlHttp=new ActiveXObject("Msxml2.XMLHTTP");}
   catch (e)
    {xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");}
  }
 return xmlHttp;
}