if(items[i] != '')
                            {
                                $.ajax({
                                  type: 'POST',
                                  url:  'php/get_contact_item_infos.ajax.php',
                                  data: 'item_id=' + items[i],
                                  success: function (r)
                                  {
                                      // get item's infos
                                      var details = r.split('|');

                                      addRow('po_items', details, items[i]);
                                      updateSubTotal(details[2], 1);

                                  }
                                });
                            }