1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>Title</title> 6 <script> 7 // 倒计时 8 function timerCount() { 9 var today = new Date(); 10 var year = today.getFullYear(); 11 var someday = new Date(2016, 12, 1, 1, 23, 59); 12 var time = (someday - today) / 1000; 13 var day = Math.floor(time / (60 * 60 * 24)); 14 var hour = Math.floor(time % (60 * 60 * 24) / (60 * 60)); 15 var min = Math.floor(time % (60 * 60 * 24) % (60 * 60) / 60); 16 var sec = Math.floor(time % (60 * 60 * 24) % (60 * 60) % 60); 17 18 function double(value) { 19 return value < 10 ? "0" + value : value; 20 } 21 22 var timeStr = "还剩下" + double(day) + "天" + double(hour) + "时" + double(min) + "分" + double(sec) + "秒"; 23 console.log(timeStr); 24 } 25 setInterval(function () { 26 timerCount(); 27 }, 1000); 28 </script> 29 </head> 30 <body> 31 </body> 32 </html>
原文：http://www.cnblogs.com/Farris/p/5128810.html