爱华网1.世界末日倒计时
<form name="form1">
<div align="center"align="center">
<center>离2012年<spanclass='wp_keywordlink_affiliate'><ahref="http://lxy.me/tag/世界末日"title="查看 世界末日 中的全部文章"target="_blank">世界末日</a></span>还有:<br>
<input type="textarea" name="left" size="35">
</center>
</div>
</form>
<script LANGUAGE="javascript">
startclock()
var timerID= null;
vartimerRunning = false;
functionshowtime() {
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 = 00 - NowHour
Minuteleft = 00 - NowMinute
Secondleft = 00 - NowSecond
Yearleft = 2012 - NowYear
Monthleft = 12 - NowMonth - 1
Dateleft = 21 - 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;
vartimerRunning = false;
functionstopclock() {
if (timerRunning)
clearTimeout(timerID);
timerRunning = false;
}
functionstartclock() {
stopclock();
showtime();
}
//-->
</script>
2.小时倒计时，可用于在线考试
<SCRIPTLANGUAGE="JavaScript">
<!--
var maxtime= 60 * 60//一个小时，按秒计算，自己调整!
functionCountDown() {
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.getElementByIdx_x("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"></div>
3.简单倒计时（仅显示天数）
<ScriptLanguage="JavaScript">
var timedate= new Date("January 14,2013");
var times ="研究生<spanclass='wp_keywordlink_affiliate'><ahref="http://lxy.me/tag/考试"title="查看 考试 中的全部文章"target="_blank">考试</a></span>";
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><fontcolor=#DEDBDE>现在离2013年" + times + "还有:<fontcolor=red><b>" + time+"</b></font>天</font></li>");
</Script>
4.复杂版倒计时，带毫秒
<script language="JavaScript"type="text/javascript">
functiond<spanclass='wp_keywordlink_affiliate'><ahref="http://lxy.me/tag/js"title="查看 js 中的全部文章"target="_blank">js</a></span>(){
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">d<spanclass='wp_keywordlink_affiliate'><ahref="http://lxy.me/tag/js"title="查看 js 中的全部文章"target="_blank">js</a></span>()</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="startcountdown!" onclick="run()">
<input id="endB" type="button" value="stopcountdown!" onclick="stop()">
<br>
<input id="diff" type="text">
<input id="next" type="text">
<script language="Javascript">
varnormalelapse = 100;
varnextelapse = normalelapse;
varcounter;
varstartTime;
var start =clock.innerText;
var finish ="00:00:00:00";
var timer =null;
//开始运行
functionrun() {
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
functionstop() {
startB.disabled = false;
endB.disabled = true;
window.clearTimeout(timer);
}
window.onload = function () {
endB.disabled = true;
}
//倒计时函数
functiononTimer() {
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>
