JavaScript browser or page off leave message

Cases

The code is as follows	Copy Code
Window.onbeforeunload = function () {return you have unsaved content! ';}

If you are referencing jquery, you can also use jquery for easy implementation, as follows JS code:

The code is as follows	Copy Code
$ (window). bind (' Beforeunload ', function () {return you have unsaved content! ';});

Let's look at a more complete example.

The code is as follows	Copy Code
Window.onbeforeunload = function () { var ie =!-[1,]; if (IE) { var n = window.event.screenx-window.screenleft; var b = n > document.documentelement.scrollwidth-20; if (!) ( b && Window.event.clientY < 0 | | Window.event.altKey)) { }else{ Return "Do not close a new site, okay?" Www.111cn.net "; } }else{ Return "Do not close a new site, okay?" Www.111cn.net "; } }

Small Tips

Window.onbeforeunload only for us to leave the page or close a hint, but I test like a multi-window browser Click x Close is not prompted, and directly close the browser is not prompted, only refresh the page to be prompted OH.