function htmlMarkup($realm, $return_to=null, $immediate=false,
                        $form_tag_attrs=null)
    {
        $form = $this->formMarkup($realm, $return_to, $immediate,
                                  $form_tag_attrs);

        if (Auth_OpenID::isFailure($form)) {
            return $form;
        }
        return Auth_OpenID::autoSubmitHTML($form);
    }