案例:javascript案例     状态:可编辑再运行    进入竖版
 运行结果 
x
 
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<html>
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<head>
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<base id="myBaseId" href="//www.w3xue.com/" />
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</head>
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<body>
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<a href="/img/eg_landscape.jpg">HTML DOM</a>
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<p>Base URL: 
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<script type="text/javascript">
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x=document.getElementById('myBaseId');
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document.write(x.href);
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</script></p>
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</body>
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</html>