DOCBOOK-APPS: Output encoding for Website

Hello,
I use Website version 2.0a2a1 for my homesite. The pages are written in
slovak language with latin-2 encoding. As XSLT I use saxon 6.2.2 with
crimson as parser for XML and XSL files.
In output html files is charset set as ISO-8859-1, but in the reality is the
file in utf-8.
My questions are: how can I determinate output encoding by transformation
and how should I set the encoding in the head of html file.

Thank you for your answer.

Regards,
  Michal Harakal