function go(){
    if (document.selecter.select1.options[document.selecter.select1.selectedIndex].value != "none") {
    goto = document.selecter.select1.options[document.selecter.select1.selectedIndex].value
    window.open(goto, 'Name');
    }                       
}

function Seite_aufrufen (){
    var index, inhalt;
    index=window.document.selecter.sprache.selectedIndex;
    inhalt=window.document.selecter.sprache.value;
    window.open(inhalt, target="_top");
        }