Joomla - add class to my menu's table

I've created a new joomla menu and it is surrounded by a table.

<table width="100%" border="0" cellpadding="0" cellspacing="1"><tr><td nowrap="nowrap"><span class="mainlevel" >RRCNA</span><span class="mainlevel">        | </span><span class="mainlevel" >Reading Recovery</span><span class="mainlevel">        | </span><span class="mainlevel" >Professional Learning</span><span class="mainlevel">        | </span><span class="mainlevel" >Conferences</span></td></tr></table>

I want to apply a class to this table but can't figure out how to do so. Any ideas?

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Panagiotis Sweb developer - designer Commented:
put a suffix to the module and then use

.moduletable-suffix tr td{} etc

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