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 d = new Date()
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var time = d.getHours()
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if (time<10)
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{
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document.write("<b>Good morning</b>")
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}
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else if (time>=10 && time<16)
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{
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document.write("<b>Good day</b>")
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}
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else
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{
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document.write("<b>Hello World!</b>")
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}
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</script>
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​
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<p>本例演示 if..else if...else 语句。</p>
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​
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</body>
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</html>
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​