顯示2位數的秒為什么不行？
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>定時器</title>
<script type="text/javascript">
? var attime;
? function sec(){
??? var sec = time.getSeconds();
??? if(sec<10){
??????? sec = "0" + sec;
??? }
??? return sec;
? }
? function clock(){
??? var time=new Date();???????? ?
??? attime = time.getHours()+":"+ time.getMinutes()+":"+sec();
??? document.getElementById("clock").value = attime;
? }
? setInterval(clock, 1000);
</script>
</head>
<body>
<form>
<input type="text" id="clock" size="50"? />
</form>
</body>
</html>
2016-12-01
明白了，是我的時間變量定義在函數里面了，導致另外一個函數調用不到時間對象