var request = null;
try	{
	request = new XMLHttpRequest();
} catch(trymicrosoft)	{
	try	{
		request = new ActiveXObject('Msxml2.XMLHTTP');
	} catch(othermicrosoft)	{
		try	{
			request = new ActiveXObject('Microsoft.XMLHTTP');		
		} catch(failed)	{
			request = null;
		}
	}
}
if(request==null) alert('Error creating request object');