RUNOOB.COM
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>电脑学习网教程(runoob.com)</title> <script> function startTime(){ var today=new Date(); var h=today.getHours(); var m=today.getMinutes(); var s=today.getSeconds();// 在小于10的数字前加一个‘0’ m=checkTime(m); s=checkTime(s); document.getElementById('txt').innerHTML=h+":"+m+":"+s; t=setTimeout(function(){startTime()},500); } function checkTime(i){ if (i<10){ i="0" + i; } return i; } </script> </head> <body onload="startTime()"> <div id="txt"></div> </body> </html>
运行结果