Change background color of HTML <area> tag

Question

I have an image with more than 100 geometrical shapes with different size and dimensions, i used image mapping over it and assign id to each like

Answer 1

As Baba already said, you can trick area background highlighting with maphilight script.

Checkout an example here:

davidlynch.org/projects/maphilight/docs/demo_features.html

Background will highlight somehow like this: