@ ~s.o.s~ - there are a few reasons I'd use getElementsByTagName. The first is that the links collection only includes anchors with an href attribute; its unlikely but still possible that an <a> tag...

You're on the right track but need to change a few things. Here's the revised code with a comment number next to the changes:

window.onload = initMenu; // 1

function initMenu() {
var...

I've been scratching my head trying to figure this out. Basically I am trying io impliment the CSS selector ":only-of-type" in XPath 1. The selector should only pick elements that have no other...