如何检测浏览器窗口/选项卡关闭事件？

I am Trying with onbeforeunload, and Unload function. But it didn't work. When clicking a link or refreshing, this event got triggered. I want an event that is triggered only when a browser window or tab is closed. The code must work in all browsers. I am Trying with onbeforeunload, and Unload fun