本文实例为大家分享了JS倒计时展示的具体代码，供大家参考，具体内容如下
第一种：精确到秒的javascript倒计时代码
HTML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
HTML代码:
<!--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:
<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
HTML代码:
<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:
<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
第六种：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"> /* This notice must be untouched at all times.countdown.js v. 1.0 The latest version is available at http://blog.csdn.net/yjgx007Copyright (c) 2004 Xinyi.Chen. All rights reserved. Created 7/30/2004 by Xinyi.Chen. Web: http://blog.csdn.net/yjgx007 E-Mail: chenxinyi1978@hotmail.com Last modified: 7/30/2004This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation;See the GNU General Public License at http:///ShopClothes/Scripts/jquery-1.4.4.min.js" type="text/javascript"></script> <script language="JavaScript"> $(document).ready(function () {<!-- 时间必须启动 --> clockon(); });function clockon() { var now = new Date(); var year = now.getFullYear(); //getFullYear getYear var month = now.getMonth(); var date = now.getDate(); var day = now.getDay(); var hour = now.getHours(); var minu = now.getMinutes(); var sec = now.getSeconds(); var week; month = month + 1; if (month < 10) month = "0" + month; if (date < 10) date = "0" + date; if (hour < 10) hour = "0" + hour; if (minu < 10) minu = "0" + minu; if (sec < 10) sec = "0" + sec; var arr_week = new Array("星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"); week = arr_week[day]; var time = ""; time = year + "年" + month + "月" + date + "日" + " " + hour + ":" + minu + ":" + sec + " " + week; $("#bgclock").html(time); var timer = setTimeout("clockon()", 200);}<!-- 隐藏脚本从旧的浏览器var DifferHour = -1var DifferMinute = -1var DifferSecond = -1var Tday1 = new Date("Feb 11, 2013 00:00:00") //**倒计时时间-注意格式var daysms = 24 * 60 * 60 * 1000var hoursms = 60 * 60 * 1000var Secondms = 60 * 1000var microsecond = 1000function clock(){ var time = new Date() var hour = time.getHours() var minute = time.getMinutes() var second = time.getSeconds() var timevalue = ""+((hour > 12) ? hour-12:hour) timevalue +=((minute < 10) ? ":0":":")+minute timevalue +=((second < 10) ? ":0":":")+second timevalue +=((hour >12 ) ? " PM":" AM") var convertHour = DifferHour var convertMinute = DifferMinute var convertSecond = DifferSecond var Diffms = Tday1.getTime() - time.getTime() DifferHour = Math.floor(Diffms / daysms) Diffms -= DifferHour * daysms DifferMinute = Math.floor(Diffms / hoursms) Diffms -= DifferMinute * hoursms DifferSecond = Math.floor(Diffms / Secondms) Diffms -= DifferSecond * Secondms var dSecs = Math.floor(Diffms / microsecond) if(convertHour != DifferHour) document.formnow.dd.value=DifferHour if(convertMinute != DifferMinute) document.formnow.hh.value=DifferMinute if(convertSecond != DifferSecond) document.formnow.mm.value=DifferSecond document.formnow.ss.value=dSecs document.formnow.ss.value=dSecs// document.formnow.Tnow.value= DifferHour DifferMinute + DifferSecond + dSecssetTimeout("clock()",1000)}//隐藏--></script></head><body onload="clock();return true" ><!--显示出内容--><form name="formnow"><input name="dd" type="text" style="border:0;" size=2>天<input name="hh" type="text" style="border:0;" size=2>小时<input name="mm" type="text" style="border:0;" size=2>分<input name="ss" type="text" style="border:0;" size=2>秒<span id="bgclock" style="float:right;padding-right:10px; padding-top:2px;text="red""></span></form><!--倒计时完毕啦--></body></html>
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。<
