Découpage d'une image
<p><img src="image.png" alt="My image" usemap="#foo" /></p>
<map name="foo" id="foo">
<!-- left, top, right, bottom -->
<area shape="rect" coords="10,5,35,40" href="http://..." />
<!-- x, y, radius -->
<area shape="circle" coords="32,47,100" href="http://..." />
<!-- x1, y1, x2, y2, ..., xn, yn -->
<area shape="polygon" coords="14, 17, 39, 22, 74, 8" href="http://..." />
</map>