为什么不读秒呢?求赐教
<!DOCTYPE html>
<html>
<head>
<title>浏览器对象</title>
<meta http-equiv="Content-Type" content="text/html; charset=gkb"/>
</head>
<body>
<h1>操作成功</h1>
<span id ="second">5</span>
<span>出现</span>
<a href="javascript:back()">反回</a>
<script type="text/javascript">
var num=document.getElementById("second").innerHTML;
function count(){
num--;
if(num==0){
location.assign("www.baidu.com")//这返回的怎么不是百度啊?啊//
}
}
setInterval("count()",1000);//这句1000代表什么?//
function back(){
window.history.back()
}
</script>
</body>
</html>