Forums Scripts & Popups A AUTOMATIC 'I'm AFKB type message

How would I write a remote that would send a message either to the whole channel or to a private if some one sent me a message or used my 'nick' in a sentence.
For example:
<Firebrick> Are you here?
or
< whoever> Has anybody seen <FireBrick> lately?

I stay connected so when I return I can scroll for the data I missed but frequently people query me and I'd like to let them know I'm AFKB.
A auto message like <FireBrick> is AFKB but will return by "inserted date/time"

I know I could use the change nick to AWAY, but people still query anyway and on the channel I use, most people don't bother switching to AWAY and back.
If anyone knows if this script/remote already exists, I'd appreciate knowing about it.

Thank you for your consideration.