var neues_fenster;
var eigenschaft,sbreite,shoehe,b,h;

function fenster (url, fenstername, breite, hoehe){

	sbreite = screen.width;
	shoehe = screen.height;
	
	x = (sbreite-breite)/2;
	y = (shoehe-hoehe)/2;

	eigenschaften="left="+x+",top="+y+",screenX="+x+",screenY="+y+",width="+breite+",height="+hoehe+",toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes";
	
	neues_fenster = open(url, fenstername, eigenschaften);
}

function fenster2 (url, fenstername){


	eigenschaften="toolbar=yes,location=yes,directories=no,status=yes,menubar=yes,scrollbars=yes,resizable=yes";
	
	neues_fenster = open(url, fenstername, eigenschaften);
}