// JavaScript Document
function popup(URL, x, y) {
	var windowx = (screen.width - x) / 2;
	var windowy = (screen.height - y) / 2;
	window.open(URL,'','toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=1,resizable=0,left='+windowx+',top='+windowy+',width='+x+',height='+y);
}