function basnav(tb,tf) {
  document.writeln('<DIV>')
  document.writeln('<TABLE CLASS="basnav" ALIGN="center" VALIGN="top" WIDTH=600 CELLPADDING=0 CELLSPACING=0 BORDER=0>')
  document.writeln('<TD CLASS="bastour" ALIGN="left">&nbsp; Tour <A HREF="'+tb+'">Backwards</A></TD>')
  document.writeln('<TD CLASS="bastour" ALIGN="center"><A HREF="javascript: void scroll(0,0)">Return to Top</A></TD>')
  document.writeln('<TD CLASS="bastour" ALIGN="right">Tour <A HREF="'+tf+'">Forwards</A> &nbsp;</TD>')
  document.writeln('</TABLE>\n</DIV>')
  document.writeln('<TABLE ALIGN="center"><TD ALIGN="center"><P CLASS="copy">All site images &copy;2005 (or earlier) Joanna Lloyd</P></TD></TABLE>')
}