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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<!DOCTYPE html>
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<html>
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<body id="myid" class="mystyle">
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<script>
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var x=document.getElementsByTagName('body')[0];
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document.write("Body CSS 类:" + x.className);
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document.write("<br>");
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document.write("另一个替代方法:");
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document.write(document.getElementById('myid').className);
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</script>
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</body>
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</html>
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