attime =(time+"").split(" "); 這個（time+""）什么意思?。?/h1>
<!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 clock(){
? ? var time=new Date(); ? ? ? ? ?
? ? attime =(time+"").split(" ");
? ? document.getElementById("clock").value = attime[4];
? }
? ?setInterval(clock,1000);
</script>
</head>
<body>
<form>
<input type="text" id="clock" size="50" ?/>
</form>
</body>
</html>
定時器代碼
<!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 clock(){
? ? var time=new Date(); ? ? ? ? ?
? ? attime =(time+"").split(" ");
? ? document.getElementById("clock").value = attime[4];
? }
? ?setInterval(clock,1000);
</script>
</head>
<body>
<form>
<input type="text" id="clock" size="50" ?/>
</form>
</body>
</html>
定時器代碼
2016-05-17
new Date();返回一個時間對象，沒有split方法；
(time+"")即將時間對象轉(zhuǎn)為字符串，來調(diào)用split