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JS倒计时代码

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第一种：精确到秒的javascript倒计时代码   
  
  
  
HTML代码:   
  
<form name="form1">   
<div align="center" align="middle">   
<center>离2010年还有:<br>   
<input type="textarea" name="left" size="35" style="text-align: center" mce_style="text-align: center">   
</center>   
</div>   
</form>   
<mce: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();   
}   
// --></mce:script>   
  
  
  
  
  
  
第二种：某某运动会   
  
  
  
HTML代码:   
<!--倒计时Javascript begin-->   
 <mce: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 class=fon1>距离"+symbol+"开幕还有<font class=fon2>"+day+"</font>天</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 class=fon1>"+symbol+"开幕已有<font class=fon2>"+day_2+"</font>天</font>"  
 setTimeout("DigitalTime1()",1000)   
  
 }   
  
 if (day==0) //正在开幕   
 {   
 //LiveClock1.innerHTML = "现在"+symbol+"天"   
 LiveClock1.innerHTML = "<font class=fon1>某某运动会今天开幕</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 class=fon1>某某运动会已全部结束</font>"  
 setTimeout("DigitalTime1()",1000)   
  
 }   
  
 }   
// --></mce: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:   
<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%60);   
 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" mce_style="color:red"></div>   
  
  
  
  
  
  
第四种：最简倒计时   
  
  
  
HTML代码:   
<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:   
<mce: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)　　   
}   
// --></mce:script>   
  
距某某开幕式还有 [<mce:script language="JavaScript" type="text/javascript"><!--   
djs()   
// --></mce:script>] 天   
第五个：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:   
  
<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">   
<mce:script language="Javascript"><!--   
/* This notice must be untouched at all times.  
 
countdown.js    v. 1.0  
The latest version is available at  
http://blog.csdn.net/yjgx007  
 
Copyright (c) 2004 Xinyi.Chen. All rights reserved.  
Created 7/30/2004 by Xinyi.Chen.   
Web: http://blog.csdn.net/yjgx007  
E-Mail: chenxinyi1978@hotmail.com  
Last modified: 7/30/2004  
 
This program is free software;  
you can redistribute it and/or modify it under the terms of the  
GNU General Public License as published by the Free Software Foundation;  
 
See the GNU General Public License  
at http://www.gnu.org/copyleft/gpl.html for more details.  
*/  
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);    
}   
// --></mce:script>  


本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/FlowerJunjie/archive/2009/02/20/3914297.aspx

 

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