If your drop down menu disappears behind your flash file in either Internet Explorer or Mozilla Firefox, there is an easy fix for this. In your html code, add the following code to your flash file.
< name="wmode" value="transparent">
Before Fix
After Fix
This will make the flash file transparent and your menu will be seen.
Code Example :
< src="http://www.website/flashfile.swf" width="500" height="333" scale="ShowAll" play="true" loop="true" menu="true" ...