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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<head>
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<script type="text/javascript">
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function startTime()
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{
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var today=new Date()
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var h=today.getHours()
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var m=today.getMinutes()
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var s=today.getSeconds()
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// add a zero in front of numbers<10
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m=checkTime(m)
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s=checkTime(s)
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document.getElementById('txt').innerHTML=h+":"+m+":"+s
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t=setTimeout('startTime()',500)
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}
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function checkTime(i)
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{
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if (i<10) 
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  {i="0" + i}
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  return i
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}
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</script>
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</head>
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<body onload="startTime()">
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<div id="txt"></div>
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</body>
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</html>
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