function IS($action,$module,$bundle,$output){
		$match = true;

		if($action != '' && $action != $this->action ){
			$match = false;
		}
		if($module != '' && $module != $this->module ){
			$match = false;
		}
		if($bundle != '' && $bundle != $this->bundle ){
			$match = false;
		}
		if($match){
			return $output;
		}
		return '';
	}