这里有新鲜出炉的 Javascript 教程,程序狗速度看过来!
Javascript 是一种由 Netscape 的 LiveScript 发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言,主要目的是为了解决服务器端语言,比如 Perl,遗留的速度问题,为客户提供更流畅的浏览效果。
这篇文章主要介绍了 JS 常用倒计时代码, 结合实例形式总结分析了 JS 常用的倒计时功能实现方法, 具有一定参考借鉴价值, 需要的朋友可以参考下
本文实例总结了 JS 常用倒计时代码。分享给大家供大家参考,具体如下:
第一种:精确到秒的 javascript 倒计时代码
- <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
- <!--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=L iveClock1>
- </div>
- </body>
第三种:小时倒计时
- <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">
- </div>
第四种:最简倒计时
- <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
- <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">
- <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 JavaScript 程序设计有所帮助。
来源: http://www.phperz.com/article/17/0721/327957.html