<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>window对象</title>
<script type="text/javascript">
var timer;
var n=5;
var handler;
function openWindow(){
handler=window.open("","new_window","width=300,height=250");
timer==setInterval(print,1000);//
}
function print(){
handler.document.body.innerHTML="离窗口关闭还有"+n+"秒钟";
n--;
if(n<0){
//取消定时器
clearInterval(timer);
//关闭子窗口
n=5;
handler.close();
}
}
</script>
</head>
<body>
<input type="button" value="打开一个新窗口" onclick="openWindow();" />
</body>
</html>