这里是一个JavaScript中显示倒计时的方法，从10一秒一秒地往下减直到计时结束（即0），代码如下：
runCount(10); function runCount(t){ if(t>0){ document.getElementById(‘shownum').innerHTML = t; t–; setTimeout(function(){runCount(t);},1000); }else{ document.getElementById(‘shownum').innerHTML = ‘倒计时结束！'; } }
运行该js代码前，需要先添加一个id为shownum的div。
js实现动态倒计时功能 * a是从后台接收到的时间戳，需转换成毫秒单位
<div> 距明年还有: <span></span>天 <span></span>小时 <span></span>分 <span></span>秒 </div> <script type="text/javascript"> /** * * copyright WE 2012.7 * js实现动态倒计时功能 * a是从后台接收到的时间戳，需转换成毫秒单位 * */ var a=12345678; //以毫秒为单位 function fomtime() { a=a-1000; var b=new Date(); b.setTime(0); var c=new Date(); c.setTime(a); var day1=b.getDate(); //为方便调用，把天数、小时等单独定义 var hours1=b.getHours(); var minu1=b.getMinutes(); var seco1=b.getSeconds(); var day2=c.getDate(); var hours2=c.getHours(); var minu2=c.getMinutes(); var seco2=c.getSeconds(); var day=day2-day1; var hours=hours2-hours1; var minu=minu2-minu1; var seco=seco2-seco1; document.getElementById('daya').innerHTML=day; document.getElementById('hoursa').innerHTML=hours; document.getElementById('minua').innerHTML=minu; document.getElementById('secoa').innerHTML=seco; setTimeout("fomtime()",1000); } fomtime(); </script>
按天倒计时
HTML代码1:
<Script Language="JavaScript"> <!-- Begin var timedate= new Date("January 14,2006"); var times="研究生考试"; var now = new Date(); var date = timedate.getTime() - now.getTime(); var time = Math.floor(date / (1000 * 60 * 60 * 24)); if (time >= 0) ; document.write("<li><font color=#DEDBDE>现在离2006年"+times+"还有: <font color=#ffffff><b>"+time +"</b></font> 天</font></li>"); // End --> </Script>
HTML代码2:
<script language="JavaScript" type="text/javascript"> function djs(){ var urodz= new Date("11/12/2008"); var now = new Date(); var num var ile = urodz.getTime() - now.getTime(); var dni = Math.floor(ile / (1000 * 60 * 60 * 24)); if (dni >1)num=dni+1 else if (dni == 1)num=2 else if (dni == 0)num=1 else num=0 document.write(num) } </script>
距某某开幕式还有 [<script language="JavaScript" type="text/javascript">djs()</script>] 天
精确到秒的javascript倒计时代码
HTML代码:
<form> <div> <center>离2013年还有:<br> <input type="textarea" size="35"> </center> </div> </form> <script LANGUAGE="javascript"> startclock() var timerID = null; var timerRunning = false; function showtime() { Today = new Date(); var NowHour = Today.getHours(); var NowMinute = Today.getMinutes(); var NowMonth = Today.getMonth(); var NowDate = Today.getDate(); var NowYear = Today.getYear(); var NowSecond = Today.getSeconds(); if (NowYear <2000) NowYear=1900+NowYear; Today = null; Hourleft = 23 - NowHour Minuteleft = 59 - NowMinute Secondleft = 59 - NowSecond Yearleft = 2009 - NowYear Monthleft = 12 - NowMonth - 1 Dateleft = 31 - NowDate if (Secondleft<0) { Secondleft=60+Secondleft; Minuteleft=Minuteleft-1; } if (Minuteleft<0) { Minuteleft=60+Minuteleft; Hourleft=Hourleft-1; } if (Hourleft<0) { Hourleft=24+Hourleft; Dateleft=Dateleft-1; } if (Dateleft<0) { Dateleft=31+Dateleft; Monthleft=Monthleft-1; } if (Monthleft<0) { Monthleft=12+Monthleft; Yearleft=Yearleft-1; } Temp=Yearleft+'年, '+Monthleft+'月, '+Dateleft+'天, '+Hourleft+'小时, '+Minuteleft+'分, '+Secondleft+'秒' document.form1.left.value=Temp; timerID = setTimeout("showtime()",1000); timerRunning = true; } var timerID = null; var timerRunning = false; function stopclock () { if(timerRunning) clearTimeout(timerID); timerRunning = false; } function startclock () { stopclock(); showtime(); } // --> </script>
某某运动会，按时间提示不同的阶段
HTML代码:
<!--倒计时Javascript begin--> <script language="JavaScript"> <!-- function DigitalTime1() { var deadline= new Date("08/13/2007") //开幕倒计时 var symbol="8月13日" var now = new Date() var diff = -480 - now.getTimezoneOffset() //是北京时间和当地时间的时间差 var leave = (deadline.getTime() - now.getTime()) + diff*60000 var day = Math.floor(leave / (1000 * 60 * 60 * 24)) var hour = Math.floor(leave / (1000*3600)) - (day * 24) var minute = Math.floor(leave / (1000*60)) - (day * 24 *60) - (hour * 60) var second = Math.floor(leave / (1000)) - (day * 24 *60*60) - (hour * 60 * 60) - (minute*60) var deadline_2= new Date("08/13/2004") //开幕后计时 var symbol_2="8月13日" var now_2 = new Date() var diff_2 = -480 - now.getTimezoneOffset() //是北京时间和当地时间的时间差 var leave_2 = (now_2.getTime() - deadline_2.getTime()) + diff_2*60000 var day_2 = Math.floor(leave_2 / (1000 * 60 * 60 * 24)) var hour_2 = Math.floor(leave_2 / (1000*3600)) - (day_2 * 24) var minute_2 = Math.floor(leave_2 / (1000*60)) - (day_2 * 24 *60) - (hour_2 * 60) var second_2 = Math.floor(leave_2 / (1000)) - (day_2 * 24 *60*60) - (hour_2 * 60 * 60) - (minute_2*60) day=day+1; day_2=day_2+1; if (day>0) //还未开幕 { //LiveClock1.innerHTML = "现在"+symbol+"天" LiveClock1.innerHTML = "<font setTimeout("DigitalTime1()",1000) } if (day<0) //已经开幕 { //LiveClock1.innerHTML = "现在离"+symbol+"还有"+day+"天"+hour+"小时"+minute+"分"+second +"秒" LiveClock1.innerHTML = "<font setTimeout("DigitalTime1()",1000) } if (day==0) //正在开幕 { //LiveClock1.innerHTML = "现在"+symbol+"天" LiveClock1.innerHTML = "<font setTimeout("DigitalTime1()",1000) } if (day<0 & day_2>19) //某某运动会结束 { //LiveClock1.innerHTML = "现在离"+symbol+"还有"+day+"天"+hour+"小时"+minute+"分"+second +"秒" LiveClock1.innerHTML = "<font setTimeout("DigitalTime1()",1000) } } // --> </script> <!--倒计时Javascript end--> <body onload=DigitalTime1()> <div id= LiveClock1></div> </body>
按小时倒计时
HTML代码: