https://radio-hobby.org/browse.php?Frameworks/jquery/plugins/jquery.accordion.js

1/*
2 * jQuery UI Multilevel Accordion v.1
3 * 
4 * Copyright (c) 2011 Pieter Pareit
5 *
6 * http://www.scriptbreaker.com
7 *
8 */
9
10//plugin definition
11(function($){
12    $.fn.extend({
13
14    //pass the options variable to the function
15    accordion: function(options) {
16        
17		var defaults = {
18			accordion: 'true',
19			speed: 300,
20			closedSign: '[+]',
21			openedSign: '[-]'
22		};
23
24		// Extend our default options with those provided.
25		var opts = $.extend(defaults, options);
26		//Assign current element to variable, in this case is UL element
27 		var $this = $(this);
28 		
29 		//add a mark [+] to a multilevel menu
30 		$this.find("li").each(function() {
31 			if($(this).find("ul").size() != 0){
32 				//add the multilevel sign next to the link
33 				$(this).find("a:first").append("<span>"+ opts.closedSign +"</span>");
34 				
35 				//avoid jumping to the top of the page when the href is an #
36 				if($(this).find("a:first").attr('href') == "#"){
37 		  			$(this).find("a:first").click(function(){return false;});
38 		  		}
39 			}
40 		});
41
42 		//open active level
43 		$this.find("li.active").each(function() {
44 			$(this).parents("ul").slideDown(opts.speed);
45 			$(this).parents("ul").parent("li").find("span:first").html(opts.openedSign);
46 		});
47
48  		$this.find("li a").click(function() {
49  			if($(this).parent().find("ul").size() != 0){
50  				if(opts.accordion){
51  					//Do nothing when the list is open
52  					if(!$(this).parent().find("ul").is(':visible')){
53  						parents = $(this).parent().parents("ul");
54  						visible = $this.find("ul:visible");
55  						visible.each(function(visibleIndex){
56  							var close = true;
57  							parents.each(function(parentIndex){
58  								if(parents[parentIndex] == visible[visibleIndex]){
59  									close = false;
60  									return false;
61  								}
62  							});
63  							if(close){
64  								if($(this).parent().find("ul") != visible[visibleIndex]){
65  									$(visible[visibleIndex]).slideUp(opts.speed, function(){
66  										$(this).parent("li").find("span:first").html(opts.closedSign);
67  									});
68  									
69  								}
70  							}
71  						});

72  					}
73  				}
74  				if($(this).parent().find("ul:first").is(":visible")){
75  					$(this).parent().find("ul:first").slideUp(opts.speed, function(){
76  						$(this).parent("li").find("span:first").delay(opts.speed).html(opts.closedSign);
77  					});
78  					
79  					
80  				}else{
81  					$(this).parent().find("ul:first").slideDown(opts.speed, function(){
82  						$(this).parent("li").find("span:first").delay(opts.speed).html(opts.openedSign);
83  					});
84  				}
85  			}
86  		});
87    }
88});
89})(jQuery);