https://www.blu-digital.co.uk/app/public/js/menu-accordion.js

1/*
2 * jQuery UI Multilevel Accordion v.1
3 * Copyright (c) 2011 Pieter Pareit
4 * http://www.scriptbreaker.com
5 *
6 */
7
8//plugin definition
9(function($){
10    $.fn.extend({
11
12    //pass the options variable to the function
13    accordion: function(options) {
14        
15		var defaults = {
16			accordion: 'true',
17			speed: 300,
18			closedSign: '[+]',
19			openedSign: '[-]'
20		};
21
22		// Extend our default options with those provided.
23		var opts = $.extend(defaults, options);
24		//Assign current element to variable, in this case is UL element
25 		var $this = $(this);
26 		
27 		//add a mark [+] to a multilevel menu
28 		$this.find("li").each(function() {
29 			if($(this).find("ul").size() != 0){
30 				//add the multilevel sign next to the link
31 				$(this).find("a:first").append('<span class="arrow-menu"></span>');
32 				
33 				//avoid jumping to the top of the page when the href is an #
34 				if($(this).find("a:first").attr('href') == "#"){
35 		  			$(this).find("a:first").click(function(){return false;});
36 		  		}
37 			}
38 		});
39
40 		//open active level
41 		$this.find("li.active").each(function() {
42 		    $(this).parents("ul").parent("li").removeClass('open');
43 			$(this).parents("ul").slideDown(opts.speed);
44 		});
45
46  		$this.find("li a").click(function() {
47  			if($(this).parent().find("ul").size() != 0){
48  				if(opts.accordion){
49  					//Do nothing when the list is open
50  					if(!$(this).parent().find("ul").is(':visible')){
51  						parents = $(this).parent().parents("ul");
52  						visible = $this.find("ul:visible");
53  						visible.each(function(visibleIndex){
54  							var close = true;
55  							parents.each(function(parentIndex){
56  								if(parents[parentIndex] == visible[visibleIndex]){
57  									close = false;
58  									return false;
59  								}
60  							});
61  							if(close){
62  								if($(this).parent().find("ul") != visible[visibleIndex]){
63  								    $(visible[visibleIndex]).parent("li").removeClass('open');
64  									$(visible[visibleIndex]).slideUp(opts.speed);
65  									
66  								}
67  							}
68  						});

69  					}
70  				}
71  				if($(this).parent().find("ul:first").is(":visible")){
72  				    $(this).parent("li").removeClass('open');
73  					$(this).parent().find("ul:first").slideUp(opts.speed);
74  					
75  					
76  				}else{
77  				    $(this).parent("li").addClass('open');  
78  					$(this).parent().find("ul:first").slideDown(opts.speed);
79  				}
80  			}
81  		});
82    }
83});
84})(jQuery);