Is Google adsense breaking my menu?

Question

I've noticed a annoying bug.

When you navigate on my website, [the menu (on top right) acts normally].

But as soon as you go to a page with a Google AdSense ad, the menu appears completely exploded for 1 to 5 seconds (this means that we can see all the submenus).

If you have a slow connection, you'll notice even more than the others.

What's causing this? Is this the advertisement?

Answer 1

Thats because youre doing the hiding in JS id assume... try adding style="display: none; to the hidden elements so they are hidden before the menu is built with js.