function doPopup(URL, WIDTH, HEIGHT) {
	url = URL;
	width = WIDTH;  // width of window in pixels
	height = HEIGHT; // height of window in pixels
	windowprops = "left=50,top=50,width=" + WIDTH + ",height=" + HEIGHT + "toolbar=no," + "location=no," + "directories=no," + "status=no," + "menubar=no," + "scrollbars=no," + "resizable=no,";
	preview = document.open(URL, "_blank", windowprops);
}