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= liveclock1></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>
ps:这里再为大家推荐几款时间及计时器相关工具供大家参考使用:
在线秒表工具:
unix时间戳(timestamp)转换工具:
在线世界各地时间查询:
更多关于javascript相关内容感兴趣的读者可查看本站专题:《javascript时间与日期操作技巧总结》《javascript错误与调试技巧总结》、《javascript数据结构与算法技巧总结》、《javascript遍历算法与技巧总结》及《javascript数学运算用法总结》
希望本文所述对大家javascript程序设计有所帮助。
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