Multiple flash movies and Z index help please

Hi, I have 2 flash movies on a page. How can I make one always be on top? The z-index parameter is not working correctly for me. Currently I have this for the one Id like on top. It actually works on my Mac in both Firefox and Safari, but not on my Windows box in any browser.


<div style="top: 0;left: 0;position: absolute;z-index: 2;visibility: show;">
   <object....> movie 
</object>
</div>

and this for the one Id like on bottom (which I have in a table which is centered on the page)

<div style="z-index: 1;visibility: show;">
   <object....> movie 
</object>
</div>

Any ideas?
Thanks,
Rich