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📄 5.3.htm

📁 时钟编程小技巧
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html;charset=gb2312">
<title>倒计时效果</title>
<script language="JavaScript">
<!--
var DifferenceHour = -1
var DifferenceMinute = -1
var DifferenceSecond = -1
var Tday = new Date("Janu 1, 2008 23:59:59")
var daysms = 24 * 60 * 60 * 1000
var hoursms = 60 * 60 * 1000
var Secondms = 60 * 1000
var microsecond = 1000 

function clock()
{
var time = new Date()
var hour = time.getHours()
var minute = time.getMinutes()
var second = time.getSeconds()
var timevalue = ""+((hour > 12) ? hour-12:hour)
timevalue +=((minute < 10) ? ":0":":")+minute
timevalue +=((second < 10) ? ":0":":")+second
timevalue +=((hour >12 ) ? " PM":" AM")
// document.formnow.now.value = timevalue
var convertHour = DifferenceHour
var convertMinute = DifferenceMinute
var convertSecond = DifferenceSecond
var Diffms = Tday.getTime() - time.getTime()
DifferenceHour = Math.floor(Diffms / daysms)
Diffms -= DifferenceHour * daysms
DifferenceMinute = Math.floor(Diffms / hoursms)
Diffms -= DifferenceMinute * hoursms
DifferenceSecond = Math.floor(Diffms / Secondms)
Diffms -= DifferenceSecond * Secondms
var dSecs = Math.floor(Diffms / microsecond)
if(convertHour != DifferenceHour) document.formnow.dd.value=DifferenceHour
if(convertMinute != DifferenceMinute) document.formnow.hh.value=DifferenceMinute
if(convertSecond != DifferenceSecond) document.formnow.mm.value=DifferenceSecond
document.formnow.ss.value=dSecs
// document.formnow.Tnow.value= DifferenceHour DifferenceMinute + DifferenceSecond + dSecs
setTimeout("clock()",1000)
}
//--> 
</script>
</head>
<body bgcolor="#ffc0c0" onload="clock();return true">
<center><h1>倒计时效果示例</h1><hr>
<form name="formnow"> 
<p>距2008年1月1日还有&nbsp; 
  <input type="text" name="dd" size=2>
  天&nbsp;
  <input type="text" name="hh" size=2>
  小时&nbsp;
  <input type="text" name="mm" size=2>
  分&nbsp;
  <input type="text" name="ss" size=2>
  秒</p>
</center>
</body>
</html>

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