function oeffneFenster(url,w,h)
{
	if (w < 100 || w > screen.width-50)
		w = screen.width-50;
	if (h < 100 || h > screen.height-50)
		h = screen.height-50;

	h += 18;	/* fuer Mozilla Firebird, der bei exakten w/h das Bild kleinskaliert */
	w += 25;

	mywindow = window.open(url,"displayWindow","menubar=no,scrollbars=yes,status=no,width="+w+",height="+h);
	mywindow.focus();
	return false;
}