無法倒計時怎么回事？
<!DOCTYPE html>
<html>
<head>
??? <title>瀏覽器對象</title>
??? <meta http-equiv="Content-Type" content="text/html; charset=gkb" />
??? <style type="text/css">
??? </style>
</head>
<body>
??? <h3>操作成功</h3>
??? <p><b id="time">5</b>秒后回到主頁<a href="javascript:history.back()">返回</a></p>
??? <script type="text/javascript">
??????? var num = document.getElementById("time").innerHTML
??????? var function clock(){
??????? if(num > 1){
??????????? document.getElementById("time'").innerHTML = --num;
??????????? }
??????? else{
??????????? location.assign("http://yifanck.cn");
??????????? }
??????? }
??????? var i = setInterval(clock, 1000);
??? </script>
</body>
</html>
2016-09-27
是不是這里的?“?var function clock(){”錯，應(yīng)該不用var吧