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November 18, 2009

Making users confirm they want to leave the page

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Written by: Christopher McCulloh

Here is how to make a user confirm that they want to browse away from your page:

<script>

window.onbeforeunload = askconfirm;

function askconfirm(){
return "Using the back/forward/refresh buttons can have unexpected results";
}

</script>

Using jQuery, you can make it so the user only has to confirm if they are leaving the page for some reason other than clicking an “a” link or submitting a form:


<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">

<html>
<head>

<meta http-equiv="content-type" content="text/html; charset=utf-8" />

<script src="http://www.google.com/jsapi">
<script>
google.load("jquery", "1");
</script>
<script>

window.onbeforeunload = askconfirm;
window.doAskConfirm = true;

function askconfirm(){
if(doAskConfirm){
return "Using the back/forward/refresh buttons can have unexpected results";
}
}

</script>
</head>
<body>

<a href="">test</a>

<form>
<input type="submit" value="submit" />
</form>

</body>
<script>
$(document).ready(function(){
$("a").click(function(){
window.doAskConfirm = false;
});
$("form").submit(function(){
window.doAskConfirm = false;
});
});
</script>
</html>



About the Author

Christopher McCulloh
E-Commerce developer at Finish Line Co-Author of HTML, XHTML and CSS All-in-one Desk Reference for Dummies Graduated from IU with a Bachelors of Media Arts and Science and a Certificate in Applied Computer Science. Tech Editor for Building Facebook Applications for Dummies and Building Websites All-in-one for Dummies 2nd Edition. Creator and maintainer of the Status-bar Calculator Firefox Extension Three years professional experience in Java E-Commerce Development and four years professional experience with PHP for a combined total of seven years professional JavaScript/HTML/CSS experience




 
 

 
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3 Comments


  1. I always wondered how this was done exactly, but I never took the time to look. I’ll refer to this article when I need to use this – thanks!


  2. btw, I like the new blog layout.


  3. Thanks!

    Yeah, this will get the job done, but I’m SURE it needs refactored. I was in a hurry when I wrote it… It’s a good starting point though!



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