function node_admin_nodes_submit($form_id, $edit) {
  $operations = node_operations();
  if ($operations[$edit['operation']][1]) {
    // Flag changes
    $operation = $operations[$edit['operation']][1];
    foreach ($edit['nodes'] as $nid => $value) {
      if ($value) {
        db_query($operation, $nid);
      }
    }
    drupal_set_message(t('The update has been performed.'));
  }
}