function oeffnefenster (url) {
        fenster=window.open(url, "_blank", "width=900,height=600,status=yes,resizable=yes,scrollbars=yes");
        fenster.focus();
        return false;
}

function oeffneimpressum (url) {
        fenster=window.open(url, "_blank", "width=auto,height=auto,status=yes,resizable=yes,scrollbars=yes");
        fenster.focus();
        return false;
}