function gross (Bild1)
{
Fenster1=window.open(Bild1,"Zweitfenster","width=800,height=600,left=20,top=20");
Fenster1.focus();
}

function gross2 (Bild1)
{
Fenster1=window.open(Bild1,"Zweitfenster","width=400,height=600,left=20,top=20");
Fenster1.focus();
}