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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<input type="text" id="clock" size="35" />
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<script language=javascript>
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var int=self.setInterval("clock()",50)
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function clock()
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  {
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  var t=new Date()
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  document.getElementById("clock").value=t
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  }
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</script>
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<button onclick="int=window.clearInterval(int)">Stop interval</button>
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</body>
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</html>
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