$sql = 'UPDATE '.TB_PREF.'debtor_trans SET trans_link = ' . $del_no .
' WHERE type='.$cart->trans_type.' AND trans_no='. $inv_no ;
$sql = 'UPDATE '.TB_PREF.'debtor_trans SET trans_link = ' . $del_no .
' WHERE type='.$cart->trans_type.' AND trans_no='. $inv_no ;