function ShowText(Url)
{
	var NW;
	var Breite = 550;
	var Hoehe = 400;
	var FensterBreite = Breite + 20;
	var FensterHoehe = Hoehe + 30;
	var Links = (screen.width - FensterBreite) / 2;
	var Oben =  (screen.height - FensterHoehe) / 2.5;

	NW = open(Url,"Fenster","dependent=yes,hotkeys=no,locationbar=no,menubar=yes,status=no,resizable=yes,scrollbars=yes,left=" + Links + ",top=" + Oben + ",width=" + FensterBreite + ",height=" + FensterHoehe);
	NW.focus();

	return false;
}