function changeurl() {
    var ziellink = document.changeform.ziel.selectedIndex;
    document.changeform.ziel.selectedIndex = "0";
    if(ziellink > "0"){
       top.location.href = document.changeform.ziel.options[ziellink].value;
    }
 }
function changeurl1() {
    var ziellink = document.changeform1.ziel.selectedIndex;
    document.changeform1.ziel.selectedIndex = "0";
    if(ziellink > "0"){
       top.location.href = document.changeform1.ziel.options[ziellink].value;
    }
 }