shim?

i've a top navigation - and i've a flyover using simple DIV tags with the help of css.

right now this flyover is not going top of active x components i know why. but i need to make the menu to overlay and come front on activex components like applets and flash. i know about chrome menus and shim (??) but the pbm is how do i fit just my flyover in this situation.

in my html its something like this:-

<li>menu1</li> -- top level menu i've an image here

and the flyover tag like this

<div id='flymenu'>
<ul><li>some1</li>
<li>some2</li>
</ul>
</div>

any help is greatly appreciated. thanks for your time.