http://www.kirupa.com/html5/detecting_if_the_user_is_idle_or_inactive.htm
A simple script that allows your app to do something if your users aren’t interacting with it after a period of time. Netflix does this…as I found out when I fell asleep in-between episodes of Grey’s Anatomy. I think Netflix automatically plays through two episodes before pausing if it detects you haven’t interacted with the app.
:pa:
