View source  
  <?php
function jquerymenu_install() {
  drupal_install_schema('jquerymenu');
}
function jquerymenu_uninstall() {
  drupal_uninstall_schema('jquerymenu');
}
function jquerymenu_schema() {
  $schema['jquerymenus'] = array(
    'description' => t('Stores information about which menus are activated'),
    'fields' => array(
      'mid' => array(
        'type' => 'serial',
        'unsigned' => TRUE,
        'not null' => TRUE,
      ),
      'menu_name' => array(
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
      ),
    ),
    'primary key' => array(
      'mid',
    ),
  );
  return $schema;
}
function jquerymenu_update_1() {
  
  $result = db_query("SELECT mid, menu_name FROM {jquerymenus}");
  $enabledmenus = array();
  while ($enabled = db_fetch_object($result)) {
    $title = '';
    $title = db_result(db_query("SELECT title FROM {menu_custom} WHERE menu_name = '%s'", $enabled->menu_name));
    if (empty($title)) {
      db_query("DELETE FROM {jquerymenus} WHERE menu_name = '%s'", $enabled->menu_name);
      db_query("DELETE FROM {blocks} WHERE module = 'jquerymenu'");
    }
  }
}