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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<body>
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​
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<script type="text/javascript">
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var patt1=new RegExp("e","g");
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​
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do
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{
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result=patt1.exec("The best things in life are free");
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document.write(result);
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}
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while (result!=null)
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</script>
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​
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</body>
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</html>
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​