tryjsref_img_usemap 在线代码实例

 <img id="planets" src="/upload2/statics/images/course/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>The value of the usemap attribute is:
<script>
document.write(document.getElementById("planets").useMap);
</script>
</p>