請問下這句代碼var int=setInterval(clock,100);為什么不能放到function clock(){}里面去？
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>定時器</title>
<script type="text/javascript">
??? function clock(){
??? var time=new Date();
??? document.getElementById("clock").value = time;
? }
???
var?int=setInterval(clock,100);
</script>
</head>
<body>
<form>
<input type="text" id="clock" size="50"? />
</form>
</body>
</html>
2016-05-12
如果代碼var int=setInterval(clock,100)放到function clock(){}里面去，那么誰來調用這個clock()方法，在外面才可以調用這個方法