function genHtml($class, $id)
    {
        require_once __DIR__ . '/hn_captcha/hn_captcha.class.php';
        $captcha = new hn_captcha($this->captcha_init, TRUE);
        $captcha->make_captcha();
        $_SESSION['library']['php']['form']['standard']['captcha'][$this->name]['public_key'] = $captcha->public_key;
        return '
<img src="' . BASE_URL . $captcha->get_filename_url() . '" alt="Captcha"/><br />
<input id="' . $id . '" type="text" name="' . $this->name . '" />
';
        //<input type="hidden" name="'.$this->name.'_captcha_key" value="'.$captcha->public_key.'" />';
    }