Is this type of menu nesting possible?
<div id="menu_vert">
<ul>
<% control Menu(2) %>
<li class="$LinkingMode"> <a href="$Link" alt="$Title"><dfn> </dfn>$MenuTitle</a>
<% if Menu(3) %>
<ul>
<% control Menu(3) %>
<li><a href="$Link" alt="$Title"><dfn> </dfn>$MenuTitle</a></li>
<% end_control %>
<ul/>
<% end_if %>
</li>
<% end_control %>
</ul>
</div>