[dwm] new feature proposal: cycle through specific windows

I was thinking of a new feature to dwm where one can cycle through a
specific kind of window; like within open terminals only or like within
open emacs windows..

I generally want to switch between xterms or open emacs windows without
cycling through all the different open windows.

does anybody else think this as a useful feature ?

-- 
engin tola - http://cvlab.epfl.ch/~tola