defined( '_JEXEC' ) or die( 'Restricted access' );
jimport( 'joomla.plugin.plugin' );
jimport( 'joomla.html.parameter' );

class plgSystemadvga extends JPlugin {

 private $authorname, $categoryname, $pubyear;

 function plgSystemClickyTrackingCode(&$subject, $params) { 

    parent::__construct($subject, $params); 

    $mode = $this->params->def('mode', 1);

}

 function onContentAfterDisplay( $context, &$article, &$params ) {
    if ($context == "com_content.article"){ 
        $this->authorname=($article->created_by_alias) ? $article->created_by_alias : $article->author;
        $this->categoryname=$article->category_title;
        $temp=explode('-',$article->created);
        $this->pubyear=$temp[0];
        //echo $this->authorname.$this->categoryname.$this->pubyear;
    }   
 }

function onAfterRender(){

        $app = JFactory::getApplication();
        $user = JFactory::getUser();        

        if ( $app->isAdmin()){
            return;
        }