function Popup(link,titel,w,h,s) 
{ 
	var winl = (screen.width - w) / 2;
	var wint = (screen.height - h) / 2;
	fenster=window.open(link,titel,'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars='+s+',resizable=no,copyhistory=no,width='+w+',height='+h+',left='+winl+',top='+wint); 
	fenster.focus;

}