function getCustomers($from=0, $records=0, $genderId=0){
		$customers = array();
		$sql = "SELECT * FROM `customer`";
		if($genderId != 0){
			$sql .= " WHERE genderId=" . $genderId;
		}
		$sql .= " ORDER BY company, lastname ";
		if($records > 0){
			$sql .= " LIMIT $from, $records";
		}

		$res = $this->connection->query($sql);
		while($row = mysqli_fetch_assoc($res)){
			array_push($customers, new Customer($row, true));
		}
		return $customers;
	}