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alert on window close

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Dec 10.2007

I have a little problem.
I have a page with link: “click here to fill the form”,
You click and new pop-up window appears,
This new window have form and 2 buttons below: “send form”, “cancel”.

I want if user closes window himself (with window close button in upper right corner of the window) this happens:
<body onbeforeunload=”alert(‘Please use CANCEL button’); return false;”>

but if user press “cancel” in form this window is close immediately.

My problem/question is:
How to check if user used close window icon and if so – write alert.

thanks in advance
adam

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JavaScript

2 Comments(s) ↴

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@FangDec 10.2007 — You can't distinguish which browser control closes the browser, window or tab.
Copy linkTweet thisAlerts:
@KorDec 10.2007 — Like this?
<i>
</i>&lt;script type="text/javascript"&gt;
onbeforeunload = function (evt) {
var message = 'Do you want to leave this page?';
evt=(typeof evt == 'undefined')?window.event:evt;
evt?evt.returnValue = message:null;
return message;
}
&lt;/script&gt;
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