Hide views options if not needed

For the drupal 7 version we had this:

    // Disable form elements when not needed.
    if (empty($field_options)) {
      $form['custom']['#description'] = t('All the options are hidden, you need to add fields first.');
      $form['custom']['fc_title']['#type'] = 'hidden';
      $form['custom']['fc_title_field']['#disabled'] = TRUE;
      $form['custom']['fc_url']['#type'] = 'hidden';
      $form['custom']['fc_url_field']['#disabled'] = TRUE;
      $form['custom']['fc_date']['#type'] = 'hidden';
      $form['custom']['fc_date_field']['#disabled'] = TRUE;
    }
    if (empty($date_fields)) {
      $form['custom']['fc_date']['#type'] = 'hidden';
      $form['custom']['fc_date_field']['#disabled'] = TRUE;
    }

Sadly the #disabled = TRUE doesn't seem to work for the D6 version. OR it is broken to in D7 :)