<html><body><img src="planets.gif" width="145" height="126" usemap="#planetmap"><map name="planetmap"> <area id="venus" shape="circle" coords="124,58,8" alt="金星" href="venus.htm"></map><p>单击按钮返回图像映射中“金星”区域的形状。</p><button onclick="myFunction()">试一试</button><p id="demo"></p><script>function myFunction() { var x = document.getElementById("venus").shape; document.getElementById("demo").innerHTML = x;}</script></body></html>