function WinOpen(url, caption, breite, hoehe) {
	linksWinPos=(screen.width - breite) / 2;
	obenWinPos=(screen.height - hoehe) / 2;
	if (linksWinPos <= 0) linksWinPos = 10;
	if (obenWinPos <= 0) obenWinPos = 10;
	fenster = window.open(url, caption, "top=" + obenWinPos + ",left=" + linksWinPos + ", height=" + hoehe + ",width=" + breite + ",status=no, toolbar=no, location=no, resizable=yes, titlebar=no, fullscreen=no");
    fenster.focus();
}