网页编程 － 倒计时
<html> <head><script language="JavaScript"> <!-- hide script from old browser var DifferenceHour = -1 var DifferenceMinute = -1 var DifferenceSecond = -1 var Tday = new Date("jan 1, 2008 00:00:00") 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) } // end hiding --> </script> </head> <body onload="clock();return true"> <form name="formnow"><font color="#0000FF">现在距离2008年元旦还有 <input type="text" name="dd" size=4> 天 <input type="text" name="hh" size=2> 小时 <input type="text" name="mm" size=2> 分 <input type="text" name="ss" size=2> 秒 </form>月份表示 Jan.Feb.Mar.Apr.May.Jun.Junly.Aug.Oct.Nov.Dec </body> </html>
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