function goto_selected(sel, targetstr)
{
  var index = sel.selectedIndex;
  if (sel.options[index].value != '') {
     if (targetstr == 'blank') {
       window.open(sel.options[index].value, 'win1');
     } else {
       var frameobj;
       if ((frameobj = eval(targetstr)) != null)
       frameobj.location = sel.options[index].value;
     }
  }
}