// __construct()
	function ProductOrder($id)
	{
		global $db;
		$this->db = $db; // database handler
		
		$this->id = $id;
		
		// get order data
		$query = sprintf(
			"SELECT id, user_id, product_id, quantity, specialOrder, dateModified
			FROM product_order
			WHERE id = %d",
			$this->id
		);
		$result = $this->db->get_row($query);
		
		$this->userId 		= $result->user_id;
		$this->productId 	= $result->product_id;
		$this->quantity 	= $result->quantity;
		$this->dateModified	= $result->dateModified;
		
	}
	
	/**
	*	these functions return characteristics of the order
	*	@access PUBLIC
	*/
	function getProductName()
	{
		$product = new Product($this->productId);
		return $product->getName();
	}
	function getUserFullName()
	{
		$user = new User($this->userId);
		return $user->getFullName();
	}