Luyenkim.Net!

Minh dang viet component cho J1.5 . Khi chay thi bi loi nay:

Warning: Missing argument 2 for JTable::__construct(), called in E:\xampp\htdocs\funiture\libraries\joomla\database\table.php on line 115 and defined in E:\xampp\htdocs\funiture\libraries\joomla\database\table.php on line 65

Warning: Missing argument 3 for JTable::__construct(), called in E:\xampp\htdocs\funiture\libraries\joomla\database\table.php on line 115 and defined in E:\xampp\htdocs\funiture\libraries\joomla\database\table.php on line 65

minh da xem lai table trong thư mục tables, mọi thứ vẫn đúng nhưng không hiểu sao vẫn bị thông báo lỗi này?

function __contruct(&$db)
{
parent::__construct('#__invoice','inv_id',$db);
}