guest map---How can I hide ads?

I've read some threads about the topic and tried to add a guest map on my website. It worked well after a long time.
Next, I tried to mask the ads by adding objects.
For some reason, they end up sitting everywhere but not where I want them to be. I've tried so many times but I just don't manage.
I'm quite lost.
Could anyone tell me what to do, please?

http://www.web.mac.com/eijimatsuoka/iWeb/Duffcarrig/guestmap.

Thank you.