function to_url01() {

  obj = document.archiv01.auswahl;
  idx = obj.selectedIndex;
  val = obj.options[idx].value;
 if (val.length != 0) {
    location.href = val;
  }

}
function to_url02() {

  obj = document.archiv02.auswahl;
  idx = obj.selectedIndex;
  val = obj.options[idx].value;
 if (val.length != 0) {
    location.href = val;
  }

}

function to_url03() {

  obj = document.archiv03.auswahl;
  idx = obj.selectedIndex;
  val = obj.options[idx].value;
 if (val.length != 0) {
    location.href = val;
  }
}  
 function to_url04() {

  obj = document.archiv04.auswahl;
  idx = obj.selectedIndex;
  val = obj.options[idx].value;
 if (val.length != 0) {
    location.href = val;
  } 
}
  function to_url05() {

  obj = document.archiv05.auswahl;
  idx = obj.selectedIndex;
  val = obj.options[idx].value;
 if (val.length != 0) {
    location.href = val;
  } 

}