<html><head><script type="text/javascript">function startTime(){var today=new Date()var h=today.getHours()var m=today.getMinutes()var s=today.getSeconds()// add a zero in front of numbers<10m=checkTime(m)s=checkTime(s)document.getElementById('txt').innerHTML=h+":"+m+":"+st=setTimeout('startTime()',500)}function checkTime(i){if (i<10)?? {i="0" + i}? return i}</script></head><body onload="startTime()"><div id="txt"></div></body></html>setTimeout()不是只執(zhí)行一次嗎，為什么這里用setTimeout()不用setInterval()?
計時器的問題？
yuanzhao
2016-05-10 17:28:35
