Interactive client-side imagemaps - the usemap attribute

      <p>
        <img src="images/usemap.gif" usemap="#my-map"
          alt="usemap demo" width="256" height="256"/>
      </p>
      <p>
        <map name="my-map">
          <area shape="rect" coords="173,14,240,71"
             alt="Rectangle" href="ext:forrest"/>
          <area shape="circle" coords="53,172,28"
             alt="Circle" href="../index.html"/>
          <area shape="default" coords="0,0.256,256"
             alt="Default" href="http://www.apache.org"/>
        </map>
      </p>