Sorry, but this is the latest entry in obsolete and obtrusive functionality. It's useless for mobile (just tested iOS Safari and Opera), which is the platform y

Sorry, but this is the latest entry in obsolete and obtrusive functionality. It's useless for mobile (just tested iOS Safari and Opera), which is the platform you should start with, and it's been proven out to be an annoying hindrance to the user on the desktop. Don't interrupt CRUD. If you can't trust the user to not perform an irreversible action, then you're doing it wrong.