JS倒计时代码汇总

本文实例总结了常见的JS倒计时代码。分享给大家供大家参考。具体汇总如下：

第一种：精确到秒的javascript倒计时代码 

HTML代码:

代码如下:

<form name="form1"> 
<div align="center" align="center"> 
<center>离2010年还有:<br> 
<input type="textarea" name="left" size="35" style="text-align: center"> 
</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>

第二种：某某运动会 

HTML代码:

代码如下:

<!--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>

第三种：小时倒计时 

HTML代码:

代码如下:

<SCRIPT LANGUAGE="JavaScript"> 
<!-- 
var maxtime = 60*60 //一个小时，按秒计算，自己调整! 
function CountDown(){ 
if(maxtime>=0){ 
minutes = Math.floor(maxtime/60); 
seconds = Math.floor(maxtime`); 
msg = "距离结束还有"+minutes+"分"+seconds+"秒"; 
document.all["timer"].innerHTML=msg; 
if(maxtime == 5*60) alert('注意，还有5分钟!'); 
--maxtime; 
} 
else{ 
clearInterval(timer); 
alert("时间到，结束!"); 
} 
} 
timer = setInterval("CountDown()",1000); 
//--> 
</SCRIPT> 
<div id="timer" style="color:red"></div>

第四种：最简倒计时 

HTML代码:

代码如下:

<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>

第五种：最简倒计时二 

HTML代码:

代码如下:

<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

第六个：Javascript倒计时器 - 采用系统时间自校验

这次利用系统时间自校验倒计时, 无需手工调校使得倒计时更为精确, 代码及详细注释如下:

代码如下:

<span id="clock">00:01:11:00</span> 
<input id="startB" type="button" value="start countdown!" onclick="run()"> 
<input id="endB" type="button" value="stop countdown!" onclick="stop()"> 
<br> 
<input id="diff" type="text"> 
<input id="next" type="text"> 
<script language="Javascript"> 
var normalelapse = 100; 
var nextelapse = normalelapse; 
var counter;  
var startTime; 
var start = clock.innerText;  
var finish = "00:00:00:00"; 
var timer = null; 
// 开始运行 
function run() { 
startB.disabled = true; 
endB.disabled = false; 
counter = 0; 
// 初始化开始时间 
startTime = new Date().valueOf(); 
// nextelapse是定时时间, 初始时为100毫秒 
// 注意setInterval函数: 时间逝去nextelapse(毫秒)后, onTimer才开始执行 
timer = window.setInterval("onTimer()", nextelapse);  
} 
// 停止运行 
function stop() { 
startB.disabled = false; 
endB.disabled = true; 
window.clearTimeout(timer); 
} 
window.onload = function() { 
endB.disabled = true; 
} 
// 倒计时函数 
function onTimer() 
{ 
if (start == finish) 
{ 
window.clearInterval(timer); 
alert("time is up!"); 
return; 
} 
var hms = new String(start).split(":"); 
var ms = new Number(hms[3]); 
var s = new Number(hms[2]); 
var m = new Number(hms[1]); 
var h = new Number(hms[0]); 
ms -= 10; 
if (ms < 0) 
{ 
ms = 90; 
s -= 1; 
if (s < 0) 
{ 
    s = 59; 
    m -= 1; 
} 
if (m < 0) 
{ 
    m = 59; 
    h -= 1; 
} 
} 
var ms = ms < 10 ? ("0" + ms) : ms; 
var ss = s < 10 ? ("0" + s) : s; 
var sm = m < 10 ? ("0" + m) : m; 
var sh = h < 10 ? ("0" + h) : h; 
start = sh + ":" + sm + ":" + ss + ":" + ms; 
clock.innerText = start; 
// 清除上一次的定时器 
window.clearInterval(timer); 
// 自校验系统时间得到时间差, 并由此得到下次所启动的新定时器的时间nextelapse 
counter++;  
var counterSecs = counter * 100; 
var elapseSecs = new Date().valueOf() - startTime; 
var diffSecs = counterSecs - elapseSecs; 
nextelapse = normalelapse + diffSecs; 
diff.value = counterSecs + "-" + elapseSecs + "=" + diffSecs; 
next.value = "nextelapse = " + nextelapse; 
if (nextelapse < 0) nextelapse = 0; 
// 启动新的定时器 
timer = window.setInterval("onTimer()", nextelapse);  
} 
</script>

希望本文所述对大家基于javascript的web程序设计有所帮助。