<HTML>
<HEAD>
<title>页面刷新</title>
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<meta http-equiv="content-type" content="text/html;charset=utf-8">
</HEAD>
<body onbeforeunload="RunOnBeforeUnload()" onunload="RunOnUnload()">
<?php echo time(); ?>
<script language="javascript">
function RunOnBeforeUnload() {
window.event.returnValue = ‘关闭浏览器将退出系统.‘;
}
function RunOnUnload() {
//执行你的代码
alert("我要做我的是事情！");
}
</script>
</body>
</HTML>
原文：http://my.oschina.net/cmliangchu/blog/530782