Hi dudes

I'm searching a plugin or alternative solution for the wish of my clients.

They want a message box like in the MS Word with the three possibilites "save & leave", "not save" and "cancel" if the user something changed in a form and then leaves the page (closing the browser or clicking another link) without a submit (save).

Can somebody help me? Is there any solution?

Thanks and sorry for my english,
Redfish