function pop(u, w, h) {
	var base = document.getElementsByTagName("base");
	
	base = base[0].href;
	
	l = (screen.width - w) / 2;
	t = (screen.height - h) / 2;
	property = "scrollbars = no, width = " + w + ", height = " + h + ", top = " + t + ", left = " + l;
	window.open(base + u, "_blank", property);
}