<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>简易网页时钟</title> <style> body,div{margin:0;padding:0;} body{color:#fff;font:16px/1.5 \5fae\8f6f\96c5\9ed1;} #clock{width:300px;text-align:center;background:#1a1a1a;margin:10px auto;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 oClock = document.getElementById("clock"); var aSpan = oClock.getElementsByTagName("span"); setInterval(getTimes, 1000); getTimes(); 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") } } </script> </head> <body> <div id="clock"> <span></span>点<span></span>分<span></span>秒 </div> </body> </html>
上述代码中,format函数那部分不太懂,为什么会有个a,tostring是将对象转换为字符串,可是a是哪个对象,并没有定义啊,那么是把谁转换为字符串呢?
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