Does anybody know of a reliable plugin or way to create a notification in Moodle that will alert users after being idle for a period of time? I'm thinking of something similar to when you are logged into, for example, your bank account or credit card account and after being idle on the page for ~15 minutes a message pops up asking "are you still here?" We have a system time-out after an hour of being idle, but many of our students are running into problems when typing lengthy discussion forum posts. They will spend a significant amount of time putting their post together, click the post to forum button, and then are told they can't post to the forum because they are no longer logged in and all of the work they did is lost.
We harp on our faculty here regularly to tell their students of this issue and to encourage them to create posts in a word processor then paste them into the forum, but it never fails that a large number of students still lose their work because of a system auto log-off.