https://www.theautochannel.com/db/includes/chrome/js/jquery.responsivemenu.js

1(function($) {
2$.fn.responsiveMenu = function(options) {
3var defaults = {
4autoArrows: false
5}
6
7var options = $.extend(defaults, options);
8return this.each(function() {
9var $this = $(this);
10var $window = $(window);
11var setClass = function() {
12if ($window.width() > 768) {
13$this.addClass('dropdown').removeClass('accordion').find('li:has(ul)').removeClass('accorChild');
14} else {
15$this.addClass('accordion').find('li:has(ul)').addClass('accorChild').parent().removeClass('dropdown');
16}
17}
18
19$window.resize(function() {
20setClass();
21$this.find('ul').css('display', 'none');
22});
23
24setClass();
25$this
26.addClass('responsive-menu')
27.find('a')
28.live('click', function(e) {
29var $a = $(this);
30var container = $a.next('ul,div');
31if ($this.hasClass('accordion') && container.length > 0) {
32container.slideToggle();
33return false;
34}
35})
36.stop()
37.siblings('ul').parent('li').addClass('hasChild');
38
39if (options.autoArrows) {
40$('.hasChild > a', $this)
41.find('strong').append('<span class="arrow">&nbsp;</span>');
42}
43});
44}
45})(jQuery);