Dropdown submenu hidden

Let me clarify my situation a bit more. The submenu will drop over the iframe but when I add a document into the iframe that’s when the document covers the submenu.
Thanks again.

Have you set a z index on the dropdown?

Which link do you embed?
e.g. for youtube there is a fix:
https://www.scorchsoft.com/news/youtube-z-index-embed-iframe-fix

I found plugin “cyclone Slider” and this works great. Also found z-index doesn’t work with internet explorer.
Thanks
Don