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1 <!DOCTYPE html> 2 <html> 3 <head lang="en"> 4 <meta charset="UTF-8"> 5 <title>Date</title> 6 </head> 7 <body onload="startTime()"> 8 <script> 9 function startTime(){10 var today = new Date();11 var h = today.getHours();12 var m = today.getMinutes();13 var s = today.getSeconds();14 m = checkTime(m);15 s = checkTime(s);16 document.getElementById("timetxt").innerHTML=h+":"+m+":"+s;17 t = setTimeout(function () {//設定逾時時間，500毫秒重新整理一次18 startTime();19 },500);20 }21 function checkTime(i){//檢查分鐘和秒，如果小於10，則在前面補0，如：01，02...22 if(i<10){23 i = "0"+i;24 }25 return i;26 }27 </script>28 <div id="timetxt"></div>29 </body>30 </html>
JavaScript時鐘執行個體
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