1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>Document</title> 6 <script type="text/javascript"> 7 window.onload = function(){ 8 var oDiv = document.getElementById('div1'); 9 10 function fnclock(){ 11 // 在实际开发中，这个时间通过ajax从后台服务器传入，避免用户修改本地时间造成错误 12 var iNow = new Date(); 13 // 未来时间：4月30日晚24点 14 var iFutrue = new Date(2020,3,30,24,0,0); 15 var iLeft = parseInt((iFutrue - iNow)/1000); 16 // 剩下多少天 17 var iDay = parseInt(iLeft/86400); 18 // 剩下多少个小时 19 var iHour = parseInt((iLeft%86400)/3600); 20 var iMinute = parseInt(((iLeft%86400)%3600)/60); 21 var iSecond = parseInt((((iLeft%86400)%3600)%60)%60); 22 var sTr = '距秒杀还有：' + fnTime(iDay) + '天' + " " + fnTime(iHour) + ":" + fnTime(iMinute) + ':' + fnTime(iSecond); 23 oDiv.innerHTML = sTr; 24 } 25 fnclock(); 26 var temer = setInterval(fnclock,1000); 27 function fnTime(n){ 28 if (n<10) { 29 return '0' + n; 30 } 31 else{ 32 return n; 33 } 34 } 35 36 } 37 </script> 38 <style type="text/css"> 39 div{ 40 width: 1000px; 41 height: 300px; 42 background-color: gold; 43 text-align: center; 44 margin: 100px auto 0; 45 font-size: 30px; 46 line-height: 300px; 47 font-family: 'Microsoft Yahei'; 48 color: red; 49 } 50 </style> 51 </head> 52 <body> 53 <div id="div1"></div> 54 </body> 55 </html>