js 时间倒计时

来源：互联网发布：蚁群算法基本流程图编辑：程序博客网时间：2024/04/27 09:37
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=utf-8" /><title>时间倒计时</title><script src="../js/jquery.js"></script></head><body><div id="datecount"></div></body><script>function dateCount(start,end){if(new Date(start)< new Date(end)){var start = new Date(start);var end = new Date(end);var time =end.valueOf()-start.valueOf();var days=Math.floor(time/(24*3600*1000));var leave1=time%(24*3600*1000)    //计算天数后剩余的毫秒数var hours=Math.floor(leave1/(3600*1000))//计算相差分钟数var leave2=leave1%(3600*1000)        //计算小时数后剩余的毫秒数var minutes=Math.floor(leave2/(60*1000)) //计算相差秒数var leave3=leave2%(60*1000)      //计算分钟数后剩余的毫秒数var seconds=Math.round(leave3/1000)var h = hours;var m = minutes;var s = seconds;var showh,showm,shows;var timeInterval = setInterval(function () {//开始执行倒计时 if (days ==0 && h == 0 && m == 0 && s == 0) { clearInterval(timeInterval); return; }//如果时、分、秒都为0时将停止当前的倒计时 if (s == 0) { s = 60; }//当秒走到0时，再次为60秒 if (s == 60) { m -= 1;//每次当秒走到60秒时，分钟减一 if (m == 0 && h > 0) {//当分等于0时并且小时还多余1个小时的时候进里面看看 h -= 1;//小时减一 m = 60;//分钟自动默认为60分 s = 60;//秒自动默认为60秒 }}if(m==60){h-=1;if(h==0 && days>0){days-=1;h=23;m = 60;s = 60;}}s -= 1;//秒继续跳动，减一showh = h<10? "0"+h:h;showm=m<10?'0'+m:m;shows=s<10?'0'+s:s;var showday =days==0?"":days+"天  ";$("#datecount").html(showday+showh+":"+showm+":"+shows);}, 1000);}else{$("#datecount").html("时间有误");}}dateCount(new Date(),"2013-8-21 17:35:00");</script></html>