Help with Java menu

[999Dom999]

I'm not a website writer/designer but I had a go at a site for a friend.

http://www.javea-holiday.co.uk/

This works fine but I have an iframe on this page:

http://www.javea-holiday.co.uk/villapics.html

The problem I have is that the iframe is on top and the java menu is underneath so I can't see the last menu option if you hover over "booking details" (look at the first url and hover over "booking details" you will see the last menu option "terms and conditions")

The only way I got round this is to move the iframe lower down the page but then on a low res computer its really far down the page and you cant see the picture gallery, I already want to move it further up the page.

Any ideas how I make the Java menu sit on top?

Also any general comments/recommendations on the site?

Thanks