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:

复制代码代码如下:

	<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:

复制代码代码如下:

	<!--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:

复制代码代码如下:

	<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:

复制代码代码如下:

	<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:

复制代码代码如下:

	<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:

复制代码代码如下:

	<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。

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