static public function addAccount() 
  {
    $result = AccountCollection::verifyFields();

    if(count($result))
      return ($result);
//  if all right, save data.

$_POST['id_account'] = $_POST['id_account'] ? $_POST['id_account'] : AccountCollection::generateAccountId();

$query = "INSERT INTO `account` (
`id` ,
`id_account` ,
`id_client` ,
`name` ,
`amount` ,
`id_currency` ,
`credit` ,
`debit` ,
`vdate1` ,
`vdate2` ,
`created_at` 
)
VALUES (
NULL , '".$_POST['id_account']."', '".$_POST['client']."', '".$_POST['aname']."', 
'".$_POST['amount']."', '".$_POST['currency']."', '".$_POST['credit']."', '".$_POST['debit']."', 
'".$_POST['valuec']."', '".$_POST['valued']."', CURRENT_TIMESTAMP );";

//die($query);

mysql_query($query);
header($_POST['id_account']? 'location: account_updated.php':'location: account_created.php');
  }