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<html><body><img id="planets" src="planets.gif" width="145" height="126" usemap="#planetmap"><map name="planetmap"> <area id="venus" shape="circle" coords="124,58,8" alt="The planet venus" href="venus.htm"></map><p>Click the button to display the value of the usemap attribute of the image.</p><button onclick="myFunction()">Try it</button><p id="demo"></p><script>function myFunction() { var x = document.getElementById("planets").useMap; document.getElementById("demo").innerHTML = x;}</script></body></html>