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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<script type="text/javascript">
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var test1= new Boolean(true);
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var test2= new Boolean(false);
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var test3= new Date();
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var test4= new String("999");
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var test5= new String("999 888");
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​
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document.write(Number(test1)+ "<br />");
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document.write(Number(test2)+ "<br />");
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document.write(Number(test3)+ "<br />");
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document.write(Number(test4)+ "<br />");
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document.write(Number(test5)+ "<br />");
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</script>
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​
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</body>
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</html>
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​