google ads are blocking sections of my flyout navagation

Im having a huge problem. I have a flyout css navagation menu. When I place google ads beside it and expand the flyout menu whatever part of the menu is over the ad just disappears behind the ad block. Is there some way around this?

 

Using CSS

Code:

z-index:1

on menu elements usually works, and is probably simplest for menus. If that doesn't work on other elements with z-index, just make sure it's higher than their highest z-index. You can go up to 2147483583 in most major browsers, and that number keeps increasing, so there is probably room.
I found this page that seems to explain how this works well:
http://css-discuss.incutio.com/wiki/Overlapping_And_ZIndex
It shows other things that affect which is frontmost, but, as I said, z-index is probably easiest.