实现代码：
<!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" xml:lang="en"> <head> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8"> <title>Document</title> <style> *{margin: 0px;padding: 0px;} body{padding: 100px;font-size: 16px;font-weight: bold;color: #fff;} #box{width:300px;text-align:center;background:#1a1a1a;padding:20px 0;} span{color:#000;width:80px;line-height:2;background:#fbfbfb;border:2px solid #b4b4b4;margin:0 10px;padding:0 10px;} </style> <script> window.onload=function(){ var aSpan = document.getElementsByTagName('span'); function getTimes(){ var oDate = new Date(); var aDate = [oDate.getHours(),oDate.getMinutes(),oDate.getSeconds()]; for(var i in aDate){ aSpan[i].innerHTML = format(aDate[i]); } }; function format(a){ return a.toString().replace(/^(d)$/,'0$1'); }; getTimes(); setInterval(getTimes,1000); } </script> </head> <body> <div id="box"> <span>0</span>点<span>0</span>分<span>0</span>秒 </div> </body> </html>
效果如下图所示：
学习要点：
Date()/toString()/定时器