function createXMLHttpRequest( )
{
	try { return new ActiveXObject( "Msxml2.XMLHTTP" ); } catch ( error ) { }
	
	try { return new ActiveXObject( "Microsoft.XMLHTTP" ); } catch ( error ) { }
	
	try { return new XMLHttpRequest( ); } catch ( error ) { }

	alert( "XMLHttpRequest not supported" );
	
	return null;
}