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;
}