Forums Scripts & Popups Auto-away script after x min idling (like on MSN)?

Hello,
Is it possible to make an auto-away script on IRC that execute after x min of idling ? I mean x min of idling = no keybord or mouse moves, like on msn, not x min idling on irc. I've been looking for such a script for a long time, please help me :-).
Thx a lot in advance.