How's this for navigation?

I’ve been playing around with an idea for a nav/ menu/ whatever using area maps and javascript image swaps… I’m sure I’ve chosen the most programmingly cumbersome way to make it come about but it works, sort of.

check it out.

I know it isn’t exactly a site but I’d just like to hear some views, especially ideas about how to make it tighter coding-wise, lighter and generally better… also alternative ways of doing the same thing… easier, quicker ways…(except flash. I know flash could do it in two minutes. I wanted it to be non-flash).

anyhow. thanks in advance…