\documentclass[12pt]{letter}
\usepackage{czech}
%\usepackage{lastpage,fancyhdr}
\input mypdfnb.lt
\input myhtml.lt
\name{Jan Hollan}
\address{Hvìzdárna a planetárium M. Koperníka v Brnì \\
          Kraví hora 2 \\
          616 00 \ Brno}
\signature{RNDr. Jan Hollan}
\begin{document}
%\fancypagestyle{plain}{\fancyfoot[C]{\thepage\ / \pageref{LastPage}}}
