//HTTPRequest 
var xmlhttp=false;
try
{
	xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");
	} 
	catch (e) 
	{
	try 
	{
		xmlhttp = new ActiveXObject("Microsoft.XMLHTTP");
	} 
	catch (E) 
	{
		xmlhttp = false;
	}
}

if (!xmlhttp && typeof XMLHttpRequest!='undefined') {
	xmlhttp = new XMLHttpRequest();
}