// Popup auflösung

newwindow=false;
function fenster(url,breite,hoehe)
{
	if(newwindow&&newwindow.closed==false)
	newwindow.close()
	var l = (screen.Width - breite) / 2;
	var t = (screen.Height - hoehe) / 2;
	newwindow = window.open(url,"newwindow","width="+breite+",height=" +hoehe+",left="+l+",top="+t+",scrollbars=0,resizable=0;");
	newwindow.focus();
}