How To Tackle Diagonally Stacked, Rounded Image Background Element Hovers?

I have quite a challenge here, and my language gap could also provide a challenge to you decrypting the title, but, heh... http://toms.somese.lv/test/ or http://jsfiddle.net/Wm32D/

Solution 1:

You can easily get a clickable circle using an imagemap and a blank image overlay. You can hook up event handlers to the AREA tag. Backwards-compatible (and brain-dead).