function QuickNav(Form)
{
  var Element = Form.TargetSite.selectedIndex;
  if (Form.TargetSite.options[Element].value != 0)
  { 
   if(Form.TargetSite.options[Element].value == "fachgebiete.html")
        {
            location = Form.TargetSite.options[Element].value;
        }
        else
        {
            window.open(Form.TargetSite.options[Element].value);
        }
  
   
   
   }   
}