1 (function ($) {

     2 

     3 Drupal.behaviors.menuChangeParentItems = {

     4   attach: function (context, settings) {

     5     $('fieldset#edit-menu input').each(function () {

     6       $(this).change(function () {

     7         // Update list of available parent menu items.

     8         Drupal.menu_update_parent_list();

     9       });

    10     });

    11   }

    12 };

    13 

    14 /**

    15  * Function to set the options of the menu parent item dropdown.

    16  */

    17 Drupal.menu_update_parent_list = function () {

    18   var values = [];

    19 

    20   $('input:checked', $('fieldset#edit-menu')).each(function () {

    21     // Get the names of all checked menus.

    22     values.push(Drupal.checkPlain($.trim($(this).val())));

    23   });

    24 

    25   var url = Drupal.settings.basePath + 'admin/structure/menu/parents';

    26   $.ajax({

    27     url: location.protocol + '//' + location.host + url,

    28     type: 'POST',

    29     data: {'menus[]' : values},

    30     dataType: 'json',

    31     success: function (options) {

    32       // Save key of last selected element.

    33       var selected = $('fieldset#edit-menu #edit-menu-parent :selected').val();

    34       // Remove all exisiting options from dropdown.

    35       $('fieldset#edit-menu #edit-menu-parent').children().remove();

    36       // Add new options to dropdown.

    37       jQuery.each(options, function(index, value) {

    38         $('fieldset#edit-menu #edit-menu-parent').append(

    39           $('<option ' + (index == selected ? ' selected="selected"' : '') + '></option>').val(index).text(value)

    40         );

    41       });

    42     }

    43   });

    44 };

    45 

    46 })(jQuery);