function FensterOeffnen (Adresse) {
  MeinFenster = window.open(Adresse, "Zweitfenster", "width=300,height=220,left=10,top=10");
  MeinFenster.focus();
}
function FensterOeffnen2 (Adresse) {
  MeinFenster = window.open(Adresse, "Zweitfenster", "width=430,height=420,left=0,top=0");
  MeinFenster.focus();
}
function FensterOeffnen3 (Adresse) {
  MeinFenster = window.open(Adresse, "Zweitfenster", "width=430,height=900,left=0,top=0");
  MeinFenster.focus();
}