[jQuery] Keeping Dropdown Menu In Front of Google Ads?

I've got a Google ad in the top right column, and drop-down menus that
come down over it. Often, it's a Flash ad, and the drop-down menu
gets hidden behind it. I have put the Google ad in a div with a low
z-index, and give the drop-down menu a high z-index. This appears to
solve it for some Google ads, but not for others. I have also read
that the way to fix this is to do as follows (per this [url=http://
www.communitymx.com/content/article.cfm?cid=E5141]link[/url]):

[code]To the Object tag, add the following parameter (opaque is shown
as an example):

<param name="wmode" value="opaque">

To the Embed tag, add the following attribute:

wmode="opaque"[/code]

However, examining the code shows that Google has already added this,
and this doesn't appear to solve it.

Is there a way to get drop-down menus to appear over Google Flash ads,
and if so, what is it?

Thanks very much in advance to all for any info.