Alert/Prevent Users From closing the browser

January 6, 2009

Alert/Prevent Users From closing the browser

Tuesday, January 06, 2009 Posted by Suprotim Agarwal
Labels: JavaScript

Here's a simple script that works on both IE and Mozilla and displays a confirmation box before closing the browser. You can use this script to detect if an activity is on and alert users about the same, before they close the browser.

<html xmlns="http://www.w3.org/1999/xhtml">

<head runat="server">

    <title></title>

    <script type="text/javascript">

        window.onbeforeunload = function(e) {

            e = e || window.event;

            e.returnValue = "Your message here";

};

    </script>

</head>

<body>

    <form id="form1" runat="server">

    <div>

    </div>

    </form>

</body>

</html>

You can use the same script on ASP.NET pages too

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About The Author

Suprotim Agarwal, ASP.NET Architecture MVP works as an Architect Consultant and provides consultancy on how to design and develop Web applications.

Suprotim is also the founder and primary contributor to DevCurry, DotNetCurry and SQLServerCurry. He has also written an EBook 51 Recipes using jQuery with ASP.NET Controls.

Follow him on twitter @suprotimagarwal

comments

1 Response to "Alert/Prevent Users From closing the browser"

Sandeep Aparajit said...

January 19, 2009 11:31 PM

The pop-up is shown even if you navigate to other page of your own website. I wanted a solution wherein the user will be altered ONLY if he is closing the Browser window. Can you pls provide any pointers?

Sandeep
http://sandeep-aparajit.blogspot.com