距离北京2008年奥运会开幕的倒记时特效，简单的演示一下！
距离北京奥运会开幕还有 <br> <html> <head> <title>倒计时测试</title> <!--倒计时设置代码--> <script language="JavaScript"> <!-- hide script from old browser var DifferenceHour = -1 var DifferenceMinute = -1 var DifferenceSecond = -1 var Tday = new Date("Aug 8, 2008 20:00:00") //**倒计时时间点-注意格式 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里面的ONLOAD注意--> <body onload="clock();return true" text="red"> <!--实现显示--> <form name="formnow"> <input name="dd" type="text" style="border:0;" size=2> 天 <input name="hh" type="text" style="border:0;" size=2> 小时 <input name="mm" type="text" style="border:0;" size=2> 分 <input name="ss" type="text" style="border:0;" size=2> 秒 </form> <!--倒计时完毕-->
[Ctrl+A 全部选择 提示：你可先修改部分代码，再按运行]
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