In accordance with solution given for T3 framework 2 :::
http://www.joomlart.com/forums/topic/page-class-suffix-4/
You can go to::
templates/ja_halite/layouts/default.php file and add this::
<?php
$itemid = JRequest::getVar(‘Itemid’);
$menu = &JSite::getMenu();
$active = $menu->getItem($itemid);
$params = $menu->getParams( $active->id );
$pageclass = $params->get( ‘pageclass_sfx’ );
?>
above
<?php if ($this->isIE() && ($this->getParam(‘direction’)==’rtl’ || $this->direction == ‘rtl’)) { ?>
and then, change::
<body id=”bd” class=”fs<?php echo $this->getParam(JA_TOOL_FONT);?> <?php echo $this->browser();?>”>
to
<body id=”bd” class=”fs<?php echo $this->getParam(JA_TOOL_FONT);?> <?php echo $pageclass; ?> <?php echo $this->browser();?>”>