Reusing a window?

[Phil. C]

[I don't know if this is the best place to ask, but from the mailing lists
at http://mail.gnu.org/mailman/listinfo/ this seems the most appropriate.]


I'm using the following bit of lisp code to open HTML formatted
documentation.  The problem is every time I use the hotkey that launches
this, it splits the current window.

(w3-fetch-other-window (concat "file://c:/php/function." (current-word)
".html"))

It would be nice if the first time I launched it, it splits the current
window, and then every other time, it just loads into the same window.  Is
there an easy way of accomplishing this?

Also, is it possible to limit the maximum number of windows per frame?  For
example, can I limit the frame to three windows, so that the top window is
always where I am typing, and the other two windows could be for reading
documentation?

Thank you,
Phil.