CSS drop down menu discrepancy

[fjohnson]

I am using a CSS drop down menu and I can not get the menu to float on top of other content AND position the sub-menu's relative to their parent in FF (works fine in ie). This it the line of code that causes problems

#menu li {}
#menu li:hover {z-index: 500;}

the z-index will make the menu appear as the top layer over all other content, but if I add position: relative to have the menu's line up where they should, the menu goes back behind the content in FF.

Any help would be greatly appreciated.
Thanks!

[swa66]

Could you post a bit more code (not all that much, but enough to replicate the problem ?).

[mercedes]

We need some code to work it out.