function zeigeErhaltungsgrade()
        {
        ErhaltungsFenster = window.open("templates/erhaltung.php","EFenster","width=750,height=240,left=0,top=0");
        }

function zeigeAbkVerz()
        {
        AbkFenster = window.open("templates/lit_verz.php","AFenster","width=750,height=600,left=0,top=0,scrollbars=yes");
        }