jQuery(document).ready(function($) {
        // ID tracker field
        var IDtracker = $('<input>').attr({
            type: 'hidden',
            id: 'acami-idtracker',
            name: 'acami-idtracker',
            value: ''
        }).prependTo('#update-nav-menu');

        function acami_add_checkbox( item ) {
            // Skip items that are known not to be hierarchical post types or that we already modified
            if ( $(item).is('.acami-checked, .menu-item-custom, .menu-item-category, .menu-item-post_tag') ) {
                return;
            }

            // Don't check this item again
            $(item).addClass('acami-checked');

            var itemID = parseInt( $(item).attr('id').replace('menu-item-', ''), 10 );

            // Gotta figure it out in PHP, so use an AJAX call
            jQuery.post(
                ajaxurl,
                {
                    action: 'acami_get_menu_status',
                    id: itemID
                },
                function( response ){
                    if ( response && response.add ) {
                        // Track IDs to check the POST for
                        IDtracker.val( IDtracker.val() + ',' + itemID );

                        // Add the checkbox
                        var checkboxid = 'acami-child-checkbox-' + itemID;
                        $(item).find('.menu-item-actions .link-to-original').after('<p><label><input type="checkbox" id="' + checkboxid + '" name="' + checkboxid + '" value="1" /> Automatically add all descendants as submenu items</label></p>');

                        if ( response.checked ) {
                            $('#' + checkboxid).prop('checked', true);
                        }
                    }
                },
                'json'
            );
        }

        // Try adding checkboxes to all existing menu items
        $('.menu-item').each(function(){
            acami_add_checkbox( this );
        });

        // When hovering over a menu item added using Javascript, try adding a checkbox to it (props DD32 for mouseover hack)
        $('.menu-item.pending').live('mouseover', function(){
            acami_add_checkbox( this );
        });
    });