Shipment Tracker Creation - Error Message

1. When user click 'Add' button Customer, Product Number, Product Number - Revision, Sales Order Number and Sales Order Line Number is compulsory field(*) to be enter. Without those information others field not able to filter out and cannot create the Shipment Tracker. 
Error Message - "Fill in required fields"

2. Sales Order Number cannot be duplicate if has been select and create under others Shipment Tracker.

3. If the quantity to ship is more than the Balance quantity.

4. If the quantity to ship is 0 or empty.

5. If user didn't enter the quantity to ship or not enter only numeric number.

6. If user not only enter numeric number. Note : For Total (MYR) accept empty field.