What you need is an image map
A quick google will turn up an image map generator which will save a lot of trouble.
( NobbyNobody 21 years a b3tan, Sat 4 Mar 2006, 23:29, archived)

I wanted some lush zoomable/scalable images
but lack the necessary skills. I just have the ideas...
( Grrrmachine the indifference engine, Sat 4 Mar 2006, 23:31, archived)