to add it:
<?php> include("common/_menu.php"); ?>

<div class="menu">
<p id="topheader"><a href="index">Cambridge University<br />Caving Club Expedition</a><br /> main content:</p><br />
  <ul>
    <li><a href="intro">Introduction</li>
    <li><a href="infodx">Main index</a></li>
    <li><a href="indxal.htm">Cave index</a></li>
    <li><a href="handbook/index.htm">Expedition handbook</a></li>
    <li><a href="pubs.htm">Published reports</a></li>
    <li><a href="areas.htm">Area description</a></li>
    <li><a href="http://www.srcf.ucam.org/caving/wiki/Main_Page" target="_blank">CUCC website</a></li>
  </ul>
</div>