$jsCall = 'updateShowHideForm('.$rev->getId().',this.checked)';
$del = Xml::check( 'showhiderevisions', false,
$hidden + array('onchange' => $jsCall) );
$jsCall = 'updateShowHideForm('.$rev->getId().',this.checked)';
$del = Xml::check( 'showhiderevisions', false,
$hidden + array('onchange' => $jsCall) );