案例：JavaScript案例     状态：可编辑再运行    进入横版
​x
 
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<html>
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<body>
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​
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<script type="text/javascript">
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var patt1=new RegExp("e");
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​
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document.write(patt1.exec("The best things in life are free"));
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</script>
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​
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</body>
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</html>
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​

 运行结果　
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