function makeShowAsLink($targetValue, $currentValue)
 {
     $msg = htmlspecialchars(CategoryTree::msg("show-{$targetValue}"));
     if ($targetValue == $currentValue) {
         return "<strong>{$msg}</strong>";
     } else {
         return $this->getSkin()->makeKnownLinkObj($this->title, $msg, "showas={$targetValue}");
     }
 }