Sales Order Entry: initial item selector position points to last orde…

…red item (seems to be more useful than always selecting first item in selector).

sales/includes/db/sales_order_db.inc

@@ -626,3 +626,17 @@ function is_prepaid_order_open($order_no)
 
 	return $result[0];
 }
+
+function last_sales_order_detail($order, $field)
+{
+        $sql = "SELECT $field
+                        FROM ".TB_PREF."sales_order_details d"
+                        ." LEFT JOIN " .TB_PREF."sales_orders o on d.order_no=o.order_no
+                        WHERE debtor_no=" . db_escape($order->customer_id)
+                        . " ORDER BY d.id DESC LIMIT 1";
+
+        $last_query=db_query($sql, "Retreive last order detail");
+        $row = db_fetch_row($last_query);
+        return $row[0];
+}
+

sales/includes/ui/sales_order_ui.inc

@@ -502,13 +502,14 @@ function sales_order_item_controls(&$order, &$rowcounter, $line_no=-1)
 		if ($order->fixed_asset)
 			stock_disposable_fa_list_cells(null,'stock_id', null, _('[Select item]'), true, $order->line_items);
 		else
-			sales_items_list_cells(null,'stock_id', null, false, true, true);
 		if (list_updated('stock_id')) {
+                            sales_items_list_cells(null,'stock_id', null, false, true, true);
 			    $Ajax->activate('price');
 			    $Ajax->activate('units');
 			    $Ajax->activate('qty');
 			    $Ajax->activate('line_total');
-		}
+		} else
+			 sales_items_list_cells(null,'stock_id', last_sales_order_detail($order, 'stk_code'), false, true, true);
 
 		$item_info = get_item_edit_info($_POST['stock_id']);
 		$units = $item_info["units"];