https://lordovervolt.com/js/scripts.js

1document.addEventListener('DOMContentLoaded', function() {
2    // from stack overflow
3    (function(doc, win, undefined) {
4        var list = doc.querySelector('#list');
5        var items = list.querySelectorAll('ul');
6        
7        for (var i = 0; len = items.length, i < len; i++) {
8            items[i].parentNode.className = 'collapse';
9        }
10        
11        addEvent( list, 'click', 
12                function (e) {
13                    e = e || window.event;
14                    var from = e.target || e.srcElement;
15                    if (!/^li$/i.test(from.nodeName) || !from.querySelectorAll('li').length) {
16                        return true;
17                    }
18                    var expand = /collapse/i.test(from.className || '');
19                    from.setAttribute('class', expand ? 'expand' : 'collapse');
20                }
21        );
22        
23        function addEvent(element, myEvent, fnc) {
24            return ((element.attachEvent) 
25                    ? element.attachEvent('on' + myEvent, fnc) 
26                    : element.addEventListener(myEvent, fnc, false));
27        }
28
29    }(document, window))
30	
31	// init syntax highlighting
32	hljs.initHighlightingOnLoad();
33
34}, false);