<!DOCTYPE html><html lang="en"><head> ???<meta charset="UTF-8" /><title>JS实现倒计时(时、分，秒)</title> <script language="javascript" type="text/javascript"> var interval = 1000; function ShowCountDown(year,month,day,divname) { var now = new Date(); var endDate = new Date(year, month-1, day); var leftTime=endDate.getTime()-now.getTime(); var leftsecond = parseInt(leftTime/1000); //var day1=parseInt(leftsecond/(24*60*60*6)); var day1=Math.floor(leftsecond/(60*60*24)); var hour=Math.floor((leftsecond-day1*24*60*60)/3600); var minute=Math.floor((leftsecond-day1*24*60*60-hour*3600)/60); var second=Math.floor(leftsecond-day1*24*60*60-hour*3600-minute*60); var cc = document.getElementById(divname); cc.innerHTML = "脚本之家提示距离"+year+"年"+month+"月"+day+"日还有："+day1+"天"+hour+"小时"+minute+"分"+second+"秒"; } window.setInterval(function(){ShowCountDown(2018,1,5,‘divdown1‘);}, interval); </script> </head> <body> <div id="divdown1"></div> </body> </html> JS 倒计时实现代码(时、分，秒)
原文地址：http://www.cnblogs.com/chenmiaosong/p/8051658.html