1 <!DOCTYPE HTML> 2 <html> 3 <head> 4 <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 5 <title>计时器</title> 6 <script type="text/javascript"> 7 var attime; 8 function clock(){ 9 var time=new Date(); 10 attime= add0(time.getHours())+":"+add0(time.getMinutes())+":"+add0(time.getSeconds()); 11 12 setInterval(clock,100) 13 document.getElementById("clock").value = attime; 14 } 15 function add0(time){ 16 if(time<10){ 17 time = ""+"0"+time; 18 } 19 return time; 20 } 21 22 </script> 23 </head> 24 <body> 25 <form> 26 <input type="text" id="clock" size="50" /> 27 </form> 28 </body> 29 </html>