[Mediawiki-l] <div class="AccordionPanel"> multiple levels of accordion tabs?

If I have a page like this:

<div id="AccYear" class="Accordion" tabindex="0"> <div class="AccordionPanel"> <div class="AccordionPanelTab">Year 2008</div> <div class="AccordionPanelContent">Content One</div> </div> <div class="AccordionPanel"> <div class="AccordionPanelTab">Year 2007</div> <div class="AccordionPanelContent">Content 2</div> </div> <div class="AccordionPanel"> <div class="AccordionPanelTab">Year 2006</div> <div class="AccordionPanelContent">Content 2</div> </div> </div> <accordion>AccYear</accordion>

How could I add accordion levels inside each year, such as headings for volume number and issue number (for academic journals)

Any Ideas?

Thanks so much for any advice

Marcus in Seattle