confirmation at the 'X' button on the browser toolbar

[liyenn]

is it possible to add a confirmation when user click on the 'X' button on the browser toolbar?

How to do this?

[J Windebank]

I do not believe that you can access those sort of low-level browser events sorry. You can use the onUnload event but that does not take in to account "how" the browser exits the page.

Regards,
Jordan

[Kravvitz]

This is possible in some browsers. Use the onbeforeunload event.

[liyenn]

ok, i'll try out!

thank you! =)

[J Windebank]

This is possible in some browsers. Use the onbeforeunload event.

I did not think this would allow you to capture the 'X' button click in the browser itself? How can you detect between hitting the 'X', and going 'File' -> 'Close'?

What would be the benefit of calling the BeforeOnUnload over OnUnload?

Regards,
Jordan

[Kravvitz]

It doesn't detect the close button. It detects if the page is unloading. It doesn't matter if the tab/window is being closed or the user is navigating to another page.

You can't stop the tab/window from closing via onunload.