Having trouble with z-index on a drop down list

[Stretty]

I have a drop down navigation menu on my website but it seems to be being displayed behind the section below it.

I've fiddled about with the z-index on a few of the elements but no matter what I try I can't get it to work.

I'm sure it's a very simple issue that I've overlooked. I was just wondering if guys could take a quick look and see if you could figure it out?

The website is here: http://websiteshowroom.co.uk/template/

Another issue I'm having is with the "Back to top" link in the footer. It's meant to scroll rather than jump. It works if I remove some other JS links. Do I simply have my JS links in the wrong order?

Thanks.

[JohnnyS]

I think this issue has been already fixed, I have checked the site and it works fine.