Flash elements look bad when being scrolled in Mozilla!

Hi everyone reading this, I hope you may know something about my problem.
I am building a site which is mainly composed of separate flash elements put
in tables. When I scroll the site with my mouse some flash elements go
above other elements making my site look stupid. You may
visit the site on http://teaching-stuff.co.cc/blue.php and you will see
what I am talking about, but don’t forget to scroll it with your mouse:)

By the way, the site is good when it is being scrolled in Internet explorer 8.

If you are aware of any solution regarding my problem please tell me :slight_smile:
(THE SITE IS NOT COMPLETED, SOME LINKS MAY NOT WORK)
Best regards

Ace