function getHTTPObject(){
      if (window.ActiveXObject) 
	      return new ActiveXObject("Microsoft.XMLHTTP");
      else if (window.XMLHttpRequest) 
	      return new XMLHttpRequest();
      else {
	      alert("Your browser does not support AJAX.");
	      return null;
      }
}

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