Fix IE6, IE7 problem about z-index

Today i receive an email to fix a problem relative to IE6,IE7 z-index problem. The submenu was hover by image. Wow i really scare about these kind of problem. You know that with IE it is really hard to debug and it is not standard.

Fortunately, i found 1 article and it works for me

http://brenelz.com/blog/squish-the-internet-explorer-z-index-bug/

The way to solve it is simple. You just need to make the container (parent) z-index is higher than the sub. Bingo!!! Just it.

Here is the solution from reference site:

before

after