function write_customer_payment($trans_no, $customer_id, $branch_id, $bank_account,
$date_, $ref, $amount, $discount, $memo_, $rate=0, $charge=0)
{
function write_customer_payment($trans_no, $customer_id, $branch_id, $bank_account,
$date_, $ref, $amount, $discount, $memo_, $rate=0, $charge=0)
{