<!DOCTYPE HTML> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>定时器</title> <script type="text/javascript"> var attime; function clock(){ var time=new Date(); attime= time.toLocaleTimeString() ; document.getElementById("clock").value = attime; } setInterval(clock,1000); </script> </head> <body> <form> <input type="text" id="clock" size="50" /> </form> </body> </html>