if (isset($params['time']) && is_array($params['time'])) {
        if (isset($params['time'][$prefix . 'Hour'])) {
            // $_REQUEST[$field_array] given
            foreach (array('H' => 'Hour',  'i' => 'Minute', 's' => 'Second') as $_elementKey => $_elementName) {
                $_variableName = '_' . strtolower($_elementName);