function popup(url,width,height)
{
	var name = "PopUp";
	datum = new Date();
	timestamp = datum.getTime();

	name = "PopUp"+timestamp;
	
	if (width == null) width=640;
	if (height == null) height=480;

	Fenster = window.open(url,name,"width="+width+",height="+height+",screenX=200,screenY=200,toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes");
	Fenster.focus();
}