function open_win(url,breite,hoehe){
	ow(url,breite,hoehe,'no');
}

function ow(url,breite,hoehe,sc){
	//var width = 720;
	//var height = 500;

	var winWidth = screen.availWidth;
	var winHeight = screen.availHeight;
	
	var t = (winHeight-hoehe)/2-50;
	var l = (winWidth-breite)/2;
	
	win=window.open (url,"Schwanen","width="+breite+",height="+hoehe+",top="+t+",left="+l + ",toolbar=no,location=no,status=no,menubar=no,scrollbars="+sc+",resizable=no");
	win.focus();
}