Could somebody tell me if Sharepoint 2005 is 508 compliant?

I am preparing for a medium sized project and wanted to use dropdown-menus similar to the ones on Sharepoint 2005.

But if I use them, how do I make them 508 compliant as a lot of the positioning and appearance will be using CSS styles.

Plus the fact that the menus will be covering other items on the page.

Thanks Guys, looks great by-the-way!

Tom Smiley