function FensterOeffnen (Adresse) {
  MeinFenster = window.open(Adresse, "TextFenster", "width=550,height=400,scrollbars=yes");
  MeinFenster.focus();
}

function BildOeffnen (Adresse) {
  MeinFenster = window.open(Adresse, "BildFenster", "width=650,height=450,scrollbars=yes");
  MeinFenster.focus();
}