1. var snapper = new Snap({
2.     element: document.getElementById('content')
3. });
4. 
   
5. var addEvent = function addEvent(element, eventName, func) {
6.     if (element.addEventListener) {
7.         return element.addEventListener(eventName, func, false);
8.     } else if (element.attachEvent) {
9.         return element.attachEvent("on" + eventName, func);
10.     }
11. };
12. 
    
13. addEvent(document.getElementById('open-panel'), 'click', function () {
14.     snapper.open('left');
15. });

jQuery is just so much prettier and easier to understand.

Thanks!

Frank