function FensterOeffnen (Adresse) {
  MeinFenster = window.open(Adresse, "Zweitfenster", "titlebar=0, toolbar=0, scrollbar=1 menubar=0, status=0, location=0, width=900, height=750");
  MeinFenster.focus();
}
function KarteOeffnen (Adresse) {
  MeinFenster = window.open(Adresse, "drittfenster", "width=730, height=560");
  MeinFenster.focus();
}
function WebOeffnen (Adresse) {
  MeinFenster = window.open(Adresse, "fenster", "toolbar=1, menubar=1, status=1, location=1, width=800, height=520");
  MeinFenster.focus();
}