tryjsref_map_get 在线代码实例

 <h3>浠ヤ笅瀹炰緥婕旂ず浜嗗浣曡闂? MAP 鍏冪礌</h3>

<img src="/upload2planets.gif" width="145" height="126" alt="Planets" usemap="#myMap">

<map id="myMap" name="myMap">
  <area shape="rect" coords="0,0,82,126" alt="Sun" href="sun.htm">
  <area shape="circle" coords="90,58,3" alt="Mercury" href="mercur.htm">
  <area shape="circle" coords="124,58,8" alt="Venus" href="venus.htm">
</map>

<p>鐐瑰嚮鎸夐挳鏉ヨ幏鍙栧浘鍍忓湴鍥句腑 area 鍏冪礌鐨勬暟鐩€?lt;/p&gt;

</p><p id="demo"></p>

<button onclick="myFunction()">鐐规垜</button>

<script>
function myFunction()
{
var x = document.getElementById("myMap").areas.length;
document.getElementById("demo").innerHTML = x;
}
</script>