下面的例子可返回 "Venus" 区域中 link-URL 的协议:
</>code
- <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="Venus"
- href="venus.htm" />
- </map>
- <p>Venus' protocol:
- <script type="text/javascript">
- x=document.getElementById('venus');
- document.write(
x.protocol
);- </script>
- </p>
- </body>
- </html>
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