Hover only on non-transparent part of image

Question

Is there any way to make only a non-transparent portion of an image to trigger mouse-over event?

If the mouse travels to the transparent area, the mouse-out should b

Answer 1

You can use an image with the old-fashioned and tags. An area tag can trigger javascript mouse events (an example use is this jQuery plugin: jQuery maphilight).
However, there is no good way to create the map dynamically - you'll have to do it manually, or call a server-side service to map it.