function smarty_function_userstatus($params, &$smarty)
{
    $user = $params['user'];
    if ($user instanceof User) {
        $user = new User_Profile($user->getId());
    }
    if (strtotime($user->getLastTouched()) > time() - 10 * 60) {
        return '<em>Online</em>';
    }
    return 'Offline';
}