这里起主要作用的是setTimeout这个函数。
<!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"> <head> <meta http-equiv="content-type" content="text/html;charset=gb2312" /> <title>JS小测试</title> </head> <body> <style type="text/css"> #time { background-color:#eee; } </style> <script type="text/javascript"> function showtime() { var myDate = new Date(); document.getElementById("time").innerHTML = myDate.getHours() + "时" + myDate.getMinutes() + "分" + myDate.getSeconds() + "秒" ; setTimeout("showtime()",1000); / } </script> <div id="time"> <script type="text/javascript">showtime();</script> </div> </body> </html>