[%-# '<=prev | up | next=>' chapters navigation bar
   # expects to be set 
   # nav          - cache navigator object
   # rel_doc_root - relative docs path
-%]
        <!-- local navigation begin -->
        <tr valign="top" class="noPrint">
            <!-- this particular first cell is here due to a strange bug in IE5 for mac -->
            <td><img src="[%- doc.dir.abs_doc_root -%]/images/trans_pix.gif"></a></td>
            <td colspan="2" align="right" valign="top" height="16" nowrap>[%- INCLUDE prev_next_link -%]</td>
            <td width="1"><img src="[%- doc.dir.abs_doc_root -%]/images/trans_pix.gif"></a></td>
        </tr>
        <!-- local navigation end -->