public function setTitle($title, $suffix='', $has_suffix=true)
    {
        // clean title
        $title = strip_tags($title);
        $suffix = strip_tags($suffix);

        // store title session
        $this->title_session = $title;

        // store title
        $this->title = $this->parseTitle($title, $suffix, $has_suffix);

        return $this;
    }