$this->fields_display = array(
			'id_product' => array('title' => $this->l('ID'), 'align' => 'center', 'width' => 20, 'filter_key' => 'a!id_product', 'type' => 'int'),
			'active' => array('title' => $this->l('Displayed'), 'active' => 'status', 'align' => 'center', 'filter_key' => 'a!active',
				'type' => 'bool', 'orderby' => false),
			'for_order' => array('title' => $this->l('zzz'), 'for_order' => 'status', 'align' => 'center', 'filter_key' => 'a!for_order',
				'type' => 'bool', 'orderby' => false));
		$this->default_order_by = 'a.`id_product`';