% Document style option "drafthead"
% -- usage:  \documentstyle[...,drafthead,...]{...}
% -- puts "DRAFT" with date and time at top of each page.
%
% Author: Stephen Page - sdpage@uk.ac.oxford.prg
%                        sdpage%prg.oxford.ac.uk@ucl-cs.arpa
%                        sdpage%prg.oxford.ac.uk@cs.ucl.ac.uk
% Released 23 June 1986
%
% Sets \pagestyle{myheadings} and installs a header.
%
% Bugs:
% -- LaTeX supplies free page number in a nonzero-width box at r.h. edge,
%    so the word DRAFT is not exactly centered. It's near enough, though!
% -- Always sets headers, destroying any user-supplied ones.
%----------------------------------------------------------------------------

%
% compute the time in hours and minutes; make new variables \timehh and \timemm
%
\newcount\timehh\newcount\timemm
\timehh=\time 
\divide\timehh by 60 \timemm=\time
\count255=\timehh\multiply\count255 by -60 \advance\timemm by \count255
%
% now put in header
\markboth%
%--- Left mark
{\hspace*{\fill}{\protect\small\bf \fbox{DRAFT}}
\hspace*{\fill}
\protect\makebox[0pt][r]{\protect\small\sl\today\ -- 
\ifnum\timehh<10 0\fi\number\timehh\,:\,\ifnum\timemm<10 0\fi\number\timemm}
}%--- right mark
{\protect\makebox[0pt][l]{\protect\small\sl\today\ -- 
\ifnum\timehh<10 0\fi\number\timehh\,:\,\ifnum\timemm<10 0\fi\number\timemm}
\hspace*{\fill}
{\protect\small\bf \fbox{DRAFT}}
\hspace*{\fill}}

\pagestyle{myheadings}