function popup_image(img_url, width, height) {
var timeout = 10;
var windowprops = "left=200,top=100,width=" + (width + 50) + ",height=" + (height + 70);
var text = "Hotel Luisenhöhe";
text += "";
if (timeout != 0)
text += "Fenster schließt nach " + timeout + " Sekunden.
";
text += "";
preview = window.open("", "preview", windowprops);
preview.document.open();
preview.document.write(text);
preview.document.close();
}