As Darat and Rich pointed out look between <!-- nav buttons bar --> and <!-- / nav buttons bar -->. Here is your code below (from view source):
Code:
<!-- nav buttons bar -->
<table class="tborder" cellpadding="6" cellspacing="0" border="0" width="100%" align="center" style="border-top-width:0px">
<tr align="center">
<td class="vbmenu_control"><a href="register.php?" rel="nofollow">Register</a></td>
<td class="vbmenu_control"><a href="faq.php?" accesskey="5">FAQ</a></td>
<td class="vbmenu_control"><a href="memberlist.php?">Members List</a></td>
<td class="vbmenu_control"><a href="calendar.php?">Calendar</a></td>
</tr>
</table>
<table cellpadding="0" cellspacing="0" border="0" width="100%" align="center" background="vbviet/misc/navbot.gif">
<tr>
<td><img src="vbviet/misc/navbot.gif"></td>
</tr>
</table>
<!-- / nav buttons bar -->