function wopenfest(theURL,target,fw,fh){
	breit = screen.availWidth;
	hoehe = screen.availHeight;
	T = (breit - fw)/2;
	L = (hoehe - fh)/2;
	features = 'location=0, toolbar=0, width='+fw+', height='+fh+', scrollbars=0, status=0, menuBar=0, resizable=0';
	Fenster=window.open(theURL, target, features);
	//alert(features);
	Fenster.moveTo(T,L);
}