代码如下：
<!DOCTYPE html>
<html>
<head>
<title>监控浏览器关闭事件</title>
</head>
<style type="text/css">
</style>
<body>
<div id="create_order">
</div>
</body>
</html>
<script type="text/javascript">
var widowClose = {};
widowClose.tip = "浏览器即将关闭，是否确定？？";
widowClose.set = function(a) {
window.onbeforeunload = function(b) {
b = b || window.event;
b.returnValue = a;
return a
}
};
widowClose.clear = function() {
fckDraft.delDraftById();
window.onbeforeunload = function() {
}
};
widowClose.set(widowClose.tip);
</script>
原文：http://www.cnblogs.com/shizhouyu/p/5663136.html