案例：javascript案例     状态：可编辑再运行    进入竖版
 运行结果　
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<html>
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<body>
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​
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<img src="/img/eg_planets.jpg"
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usemap="#planetmap" />
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​
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<map name="planetmap">
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<area id="venus" shape="circle"
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coords="180,139,14"
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alt="Venus"
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href="/example/hdom/venus.html" accessKey="v" />
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</map>
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​
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<p>"Venus" 的快捷键是：
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<script type="text/javascript">
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x=document.getElementById('venus');
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document.write(x.accessKey);
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</script>
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</p>
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</body>
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</html>
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​