I\'m developing an internal web app on our company intranet using PHP. One section of the app displays a couple of high resolution images to the user. These images are in th
Why don't you use Responsive Image Maps instead. This way you can still use poly maps for oddly shaped items.
http://mattstow.com/experiment/responsive-image-maps/rwd-image-maps.html
It's as easy as adding the script. And one line of javascript:
$('img[usemap]').rwdImageMaps();