function calendar_menu()
{
  global $wpdb;

  // Set admin as the only one who can use Calendar for security
  $allowed_group = 'manage_options';

  // Use the database to *potentially* override the above if allowed
  $configs = $wpdb->get_results("SELECT config_value FROM " . WP_CALENDAR_CONFIG_TABLE . " WHERE config_item='can_manage_events'");
  if (!empty($configs))
    {
      foreach ($configs as $config)
	{
	  $allowed_group = $config->config_value;
	}
    }

  // Add the admin panel pages for Calendar. Use permissions pulled from above
   if (function_exists('add_menu_page') && !current_user_can('manage_options'))
     {
       add_menu_page(__('Calendar','calendar'), __('Calendar','calendar'), $allowed_group, 'calendar', 'edit_calendar');
     }
   if (function_exists('add_submenu_page') && !current_user_can('manage_options'))
     {
       add_submenu_page('calendar', __('Manage Calendar','calendar'), __('Manage Calendar','calendar'), $allowed_group, 'calendar', 'edit_calendar');
       add_action( "admin_head", 'calendar_add_javascript' );
       // Note only admin can change calendar options
       add_submenu_page('calendar', __('Manage Categories','calendar'), __('Manage Categories','calendar'), 'manage_options', 'calendar-categories', 'manage_categories');
       add_submenu_page('calendar', __('Calendar Config','calendar'), __('Calendar Options','calendar'), 'manage_options', 'calendar-config', 'edit_calendar_config');
     }
}