function goToURL(form)
  {

    var myindex=form.dropdownmenu.selectedIndex
    if(!myindex=="")
      {
        window.location.href=form.dropdownmenu.options[myindex].value;

        // This is an alternative method you can use
        // var frameTarget = "_new";
        // window.open(form.dropdownmenu.options[myindex].value,frameTarget,"");
      }
}