HTML img tags

[Hikaru Ichijyo]

Is there a mode, or some bit of Lisp code I can put in ~/.emacs, that
will let Emacs guess the width= and height= attributes of an image file
from the image itself when I create an img tag in HTML?  I realize
there's probably no way for Emacs to do that without calling external
programs as a subprocess, so it's unlikely, but it would certainly be
convenient, and there are some HTML authoring programs that will do that
for you.  The old KDE 3 app Quanta Plus did, but I'd rather do
everything in Emacs.

-- 
He that would make his own liberty secure must guard even his enemy from
oppression; for if he violates this duty, he establishes a precedent
that will reach to himself.
                                        --Thomas Paine