function changepage(Dest){
  var c   = 1;    

  if (Dest.selectedIndex == 0)
    return;
  else
    {
    c = Dest.selectedIndex
    if (Dest.options[c].value == "")
      {
      Dest.selectedIndex = 0
      return;
      }
    else
      {  
      top.window.location.href = Dest.options[c].value;
      Dest.selectedIndex = 0
      }
    }
}