//popup
function popWin(url, w, h, s, r, winname)
{
	width=screen.width;
	height=screen.height;

	x=(width/2)-(w/2);
	y=(height/2)-(h/2);

	opt = "left=" + x + ", top=" + y + ", width=" + w + ", height=" + h;
	opt = opt + ", toolbar=no,location=no,directories=no,status=yes,menubar=no";
	opt = opt + ",scrollbars=" + s;
	opt = opt + ",resizable=" + r;
	window.open(url, winname, opt);
}