Drupal → Отправить Webform-у с помощью AJAX

/**
 * Implements hook_form_FORM_ID_alter(): webform_client_form_123.
 */
function mymodule_form_webform_client_form_123_alter(&$form, &$form_state) {
  $form['actions']['submit']['#ajax'] = array(
    'callback' => 'mymodule_form_webform_client_form_ajax_submit',
    'wrapper' => $form['#id'],
  );
  // Удаляем #pre_render, иначе не будет работать ajax
  unset($form['actions']['submit']['#pre_render']);
}
 
/**
 * Ajax submit.
 */
function mymodule_form_webform_client_form_ajax_submit($form, &$form_state) {
  if (form_get_errors()) {
    return $form;
  }
  else {
    $webform = $form['#node']->webform;
    return check_markup($webform['confirmation'], $webform['confirmation_format']);
  }
}

/**
 * Implements hook_form_BASE_FORM_ID_alter(): webform_client_form.
 */
function MODULENAME_form_webform_client_form_alter(&$form, &$form_state) {
  if ($form['#action'] == base_path() . 'system/ajax' || _autodialog_check_request()) {
    $form['actions']['submit']['#ajax'] = array(
      'callback' => 'MODULENAME_form_webform_client_form_ajax_submit',
      'wrapper' => $form['#id'],
    );
    unset($form['actions']['submit']['#pre_render']);
  }
}
 
/**
 * Ajax submit.
 */
function MODULENAME_form_webform_client_form_ajax_submit($form, &$form_state) {
  if (form_get_errors()) {
    return $form;
  }
  else {
    $webform = $form['#node']->webform;
    return check_markup($webform['confirmation'], $webform['confirmation_format']);
  }
}