Since I was working on a site recently where a flash movie overlapped my div submenus, I googled and discovered the following extra parameters to add to the <object> and <embed> tags.

Adding the following syntax to your html code should fix the issue nicely.

Within the <object> open/close tags, enter the following extra parameter:
<param name="wmode" value="transparent">

Also, modify the embed tag to include an extra attribute.
<embed wmode="transparent" ... >

Hope that helps someone else out there in need.