function ordering (con_id, width, height){
	width = parseInt(width);
	height = parseInt(height);
	var add = "width=" + width + ",height=" + height + ",status=no,scrollbars=no,resizable=no"
	url = "popup.php?ordering=" + con_id;
	fenster = window.open(url, "Preview", add);
	fenster.focus();
}