js定时器

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<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'Time.jsp' starting page</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">


</head>

<body>
<div id="div" style="width:100%;height:100%; background-color: white" align="right" >

</div>
</body>
<script type="text/javascript">
function time(){
var date=new Date();
var time=date.toLocaleString();
var div=document.getElementById("div");
div.innerHTML=time;//写入页面

}
setInterval("time()", 1000);

</script>
</html>

以上源码

window.setInterval()

功能:

定时函数,周期以毫秒为单位,

语法: var timerId=setInterval("fn()",3000)

fn() 表示函数,3000表示没3秒执行一次

timerId : 定时器返回的 id

注意: setInterval()buhui 停止调用函数. 直到执行clearInterval() ,或者窗口关闭.

取消定时器:

使用 clearInterval(id_of_Interval)

id_of_interval 为 setinterval 返回的id

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