如何使用JavaScript实现倒计时

栏目: java语言 / 发布于: / 人气:1.45W

导语：如何使用JavaScript实现倒计时呢?下面是小编给大家提供的`JavaScript常用倒计时实现代码，大家可以参考阅读，更多详情请关注应届毕业生考试网。

　　第一种：精确到秒的javascript倒计时代码

</center>

</p>

</form>

startclock()

var timerID = null;

var timerRunning = false;

function showtime() {

Today = new Date();

var NowHour = ours();

var NowMinute = inutes();

var NowMonth = onth();

var NowDate = ate();

var NowYear = ear();

var NowSecond = econds();

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'

e=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

<!--

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 - imezoneOffset() //是北京时间和当地时间的时间差

var leave = (ime() - ime()) + diff*60000

var day = r(leave / (1000 * 60 * 60 * 24))

var hour = r(leave / (1000*3600)) - (day * 24)

var minute = r(leave / (1000*60)) - (day * 24 *60) - (hour * 60)

var second = r(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 - imezoneOffset() //是北京时间和当地时间的时间差

var leave_2 = (now_ime() - deadline_ime()) + diff_2*60000

var day_2 = r(leave_2 / (1000 * 60 * 60 * 24))

var hour_2 = r(leave_2 / (1000*3600)) - (day_2 * 24)

var minute_2 = r(leave_2 / (1000*60)) - (day_2 * 24 *60) - (hour_2 * 60)

var second_2 = r(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

{

//rHTML = "现在"+symbol+"天"

rHTML = "<font

setTimeout("DigitalTime1()",1000)

}

if (day<0) //已经开幕

{

//rHTML = "现在离"+symbol+"还有"+day+"天"+hour+"小时"+minute+"分"+second +"秒"

rHTML = "<font

setTimeout("DigitalTime1()",1000)

}

if (day==0) //正在开幕

{

Tags：JavaScript 倒计时

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