Если в модуле нет поля суффикс класса CSS - Вопросы по CSS

<param name="moduleclass_sfx" type="text" default="" label="Module Class Suffix" description="PARAMMODULECLASSSUFFIX" />

<div class="moduleclass">
           content
</div>

<div class="moduleclass<?php echo $params->get('moduleclass_sfx'); ?>">
           content
</div>

$params->get('moduleclass_sfx');

/* begin Box, BlockContent */
.art-BlockContent
{
	position:relative;
	z-index:0;
	margin:0 auto;
	min-width:1px;
	min-height:1px;
}

.art-BlockContent-body
{
	position: relative;
	z-index: 1;
	padding: 6px;
}



.art-BlockContent-body
{
	color:#000000;
font-family: Arial, Helvetica, Sans-Serif;
font-size: 14px;
}

.art-BlockContent-body a:link
{
	color: #0206E3;
font-family: Arial, Helvetica, Sans-Serif;
}

.art-BlockContent-body a:visited, .art-BlockContent-body a.visited
{
	color: #6C6A6A;
font-family: Arial, Helvetica, Sans-Serif;
text-decoration: none;
}

.art-BlockContent-body a:hover, .art-BlockContent-body a.hover
{
	color: #EB0000;
font-family: Arial, Helvetica, Sans-Serif;
text-decoration: underline;
}

.art-BlockContent-body ul
{
	list-style-type: none;
	color: #818D87;
	margin:0;
	padding:0;
}

.art-BlockContent-body ul
{
	list-style-type: none;
	color: #818D87;
}


.art-BlockContent-body ul li
{
font-family: Tahoma, Arial, Helvetica, Sans-Serif;
font-size: 14px;
line-height: 125%;
  line-height: 1.25em;
}

/* end Box, BlockContent */

.art-BlockContent-body ul
{
	list-style-type: none;
	color: #818D87;
	margin:0;
	padding:0;
}

<?php if( $this->countModules('right_menu') ){ ?>
	<div id="right_menu">
	<jdoc:include type="modules" name="right_menu" style="xhtml" />
	</div>
<?php } ?>