So on several occasions recently (like just now, Grrrrrr) i have been writing a reply on a thread and go to delete something i've written due to spelling or something - but having inadvertently clicked outside the text box the backspace button becomes a back button for the browser and all of a sudden that big long detailed message that i have written disappears with no way of retrieving it.

This happens cause i use a laptop and sometime i catch the track pad as i'm typing (yes i could turn the track pad off i know, and usually do - but it defaults to on everytime I reboot etc)

Anyway, i was thinking would it not be possible to make a popup appear asking if you are sure you want to navigate away from the page without posting when you have started a reply? Like what happens on facebook if you type a comment but don't post and then click a link.