function openWindow(url, name, width, height) {
	var myLeft = (screen.width  - width) / 2;
	var myTop  = (screen.height - height) / 2;
	window.open(url, name, "height="+height+",width="+width+",left="+myLeft+",top="+myTop+",scrollbars=yes,status=no,toolbar=no,menubar=no,location=no")
}