function clear(obj)
{
  var i;
  for(i = (obj.options.length - 1); i >= 0; i--)
    obj.options[i] = null;
}

function cityfill(parentValue)
{
  var selObj = document.getElementById("Stadt");
  if(selObj)
  {
    clear(selObj);
    var i, j = 0;
    var land;
    var city = "Bitte Stadt/Typ auswählen";
    var url = "index.html";
    selObj.options[j++] = new Option(city, url);
    for(i = 0; i < stadt.length; i++)
    {
      land = stadt[i].substring(0, stadt[i].indexOf(";"));
      if(land == parentValue)
      {
        city = stadt[i].substring(stadt[i].indexOf(";")+1, stadt[i].lastIndexOf(";"));
        url = stadt[i].substring(stadt[i].lastIndexOf(";")+1);
        selObj.options[j++] = new Option(city, url);
      }
    }
    if(selObj.options.length>1)
    {
      selObj.disabled = false;
      selObj.options[0].selected = true;
    }
    else
    {
      selObj.disabled = true;
    }
  }
}

function typefill(parentValue)
{
  var selObj = document.getElementById("Typ");
  if(selObj)
  {
    clear(selObj);
    var i, j = 0;
    var manufacturer;
    var type = "Bitte Typ auswählen";
    var url = "index.html";
    selObj.options[j++] = new Option(type, url);
    for(i = 0; i < typ.length; i++)
    {
      manufacturer = typ[i].substring(0, typ[i].indexOf(";"));
      if(manufacturer == parentValue)
      {
        type = typ[i].substring(typ[i].indexOf(";")+1, typ[i].lastIndexOf(";"));
        url = typ[i].substring(typ[i].lastIndexOf(";")+1);
        selObj.options[j++] = new Option(type, url);
      }
    }
    if(selObj.options.length>0)
    {
      selObj.disabled = false;
      selObj.options[0].selected = true;
    }
    else
    {
      selObj.disabled = true;
    }
  }
}

 function verweis(url)
{
  document.location.href = url;
}