function popup( page, w, h ) {
		leftscreen	= (screen.width)?(screen.width-w)/2:100;
		topscreen	= (screen.height)?(screen.height-h)/2:100;
		settings	= 'width='+w+',height='+h+',top='+topscreen+',left='+leftscreen+',scrollbars=no,location=no,directories=no,status=no,menubar=no,toolbar=no,resizable=no';
		window.open(page, 'page', settings);
	}