<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<10 不然就出现22:8:24这种不美观的时间 m=checkTime(m) s=checkTime(s) document.getElementById('txt').innerHTML=h+":"+m+":"+s t=setTimeout('startTime()',500) //每隔500毫秒更新一次(1秒内就可以,时间要走动) } function checkTime(i) { if (i<10) {i="0"+ i} return i } </script> </head> <body onload="startTime()"> <div id="txt"></div> </body> </html>
关于setTime()详细有:http://www.runoob.com/jsref/met-win-settimeout.html