var Ajax=false;
function xmlHTTP()
{
if(window.XMLHttpRequest)
{
Ajax=new XMLHttpRequest();
}
else if(window.ActiveXObject)
{
try
{
Ajax=new ActiveXObject("Msxml2.XMLHTTP");
}
catch(e)
{
	try
	{
Ajax=new ActiveXObject("Microsoft.XMLHTTP");
	}
	catch(e)
	{}
}
}
}