Data save to table PS1.6

[SQ5IZZ]

Hello All,
1. I have a last problem saving data to table order_detail.
2. I have created new field in _product_line.tpl Combo box to change the data.
<td class="stat_del text-left">
<span class="stat_del_show">{$product['V_DEL_STAT']}</span>
{if $can_edit}
<span class="stat_del_edit" style="display:none;">
<input type="text" name="delstat" class="edit_dstat" value="{$product['V_DEL_STAT']|htmlentities}" list=liststat>
<datalist id=liststat >
<option> PREPARATION EN COURS CDICOUNT
<option> PREPARATION EN COURS ERIC
<option> LIVRAISON EN COURS GLS
<option> EN COURS DE RÉAPPROVISIONNEMENT
</datalist>
</span>
{/if}
</td>

3. I have added to orders.js following lines to check if i can get value from field/

$('button.submitProductChange').unbind('click').click(function(e) {
var VDELSTAT = $('.edit_dstat').val();
window.alert("Change to: " + VDELSTAT); - displays window witch chosen value - works ok
.....
.....

4. I'm trying to save the data to table with:
Adding to :
public function ajaxProcessEditProductOnOrder()
{
// Return value

$product_id_order_detail = Tools::getValue('product_id_order_detail');
$del_stat = Tools::getValue('VDELSTAT');
Db::getInstance()->Execute( 'UPDATE `'._DB_PREFIX_.'order_detail` SET `V_DEL_STAT` = '.$del_stat.' WHERE `id_order_detail` = '.(int)$product_id_order_detail );

but ZERO (0) value is saved to table.
I tried (for test):
public function ajaxProcessEditProductOnOrder()
{
// Return value

$product_id_order_detail = Tools::getValue('product_id_order_detail');
$del_stat = Tools::getValue('product_id_order_detail');
Db::getInstance()->Execute( 'UPDATE `'._DB_PREFIX_.'order_detail` SET `V_DEL_STAT` = '.$del_stat.' WHERE `id_order_detail` = '.(int)$product_id_order_detail );

In this case all works great id_order_detail is saved to my field in database.

I suppose I have to post somehow VDELSTAT value to be able to use it with Tools::getValue, but I have know idea how to do it.
I will be very greatful if someone could give me little advise.
Regards
Jakub
 

Edited April 2, 2015 by SQ5IZZ (see edit history)

[SQ5IZZ]

No resolution for me?.