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JS倒计时代码
第一种：精确到秒的javascript倒计时代码
HTML代码:
<formname="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>
<scriptLANGUAGE="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=http://www.mamicode.com/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:
<!--倒计时Javascriptbegin-->
<scriptlanguage="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Javascriptend-->
<bodyonload=DigitalTime1()>
<div id=LiveClock1></div>
</body>
第三种：小时倒计时
HTML代码:
<SCRIPTLANGUAGE="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:
<ScriptLanguage="JavaScript">
<!--Begin
var timedate= new Date("January14,2006");
vartimes="研究生考试";
var now = newDate();
var date = timedate.getTime() -now.getTime();
var time = Math.floor(date / (1000 * 60 * 60 *24));
if (time >= 0);
document.write("<li><fontcolor=#DEDBDE>现在离2006年"+times+"还有:<fontcolor=#ffffff><b>"+time+"</b></font>天</font></li>");
// End -->
</Script>
第五种：最简倒计时二
HTML代码:
<script language="JavaScript"type="text/javascript">
function djs(){
var urodz= newDate("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:
<spanid="clock">00:01:11:00</span>
<input id="startB" type="button" value="http://www.mamicode.com/start"onclick="run()">
<input id="endB" type="button" value="http://www.mamicode.com/stop"onclick="stop()">
<br>
<input id="diff"type="text">
<input id="next"type="text">
<scriptlanguage="Javascript">
var normalelapse = 100;
var nextelapse =normalelapse;
varcounter;
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 = newDate().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 = newString(start).split(":");
var ms = newNumber(hms[3]);
var s = newNumber(hms[2]);
var m = newNumber(hms[1]);
var h = newNumber(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 = http://www.mamicode.com/counterSecs +"-" + elapseSecs + "=" +diffSecs;
next.value = "http://www.mamicode.com/nextelapse =" +nextelapse;
if (nextelapse < 0) nextelapse =0;
// 启动新的定时器
timer = window.setInterval("onTimer()",nextelapse);
}
</script>
JS倒计时代码