public function addLinkTag($options)
    {
        $unique = "u";
        foreach ($options as $key=>$value) {
            $unique.="[$key=$value]";
        }
        $this->tags[md5($unique)] = array(
            "at"=>'begin',
            "tag"=>"link",
            "options"=>$options,
            "content"=>"",
        );
        return $this;
    }