I had this problem a week ago. It involves adding a dropdown menu on frames. The menu is expected to span across involved frames. Aside from that, the dropdown is set to use a predefined image.
The problem stated above is easy to be solved at first glance. And indeed, I was able to solve it using a select tag. But to my dismay, select tag does not render the right background on IE like FF does.
Luckily, I figured something right. I shall show you how, and hope it works on your side as well.

