Stored Procedure Needed for Document Series Check

Hi Experts,            

          While Doing procurement PO from SO,  the Document Series in SO  for Branchwise must be match with the PO ..

While Prepaing PO Document from SO , If there is mismatch of Document Series When compared to SO then Document should not add in PO...

I need a stored procedure

Correct Document series mentioned below

SO Series         PO Series                        Branch

B-SO1516        B-PO1516                         Bangalore

P-SO1516        P-PO1516                         Pune

Ex,

Wrong Document Series

SO Series        PO Series                         Branch                        Remarks

B-SO1516        P-PO1516                         Bangalore               Here the Document Series for PO must be B-PO1516  

P-SO1516        B-PO1516                         Pune                       Here the Document Series for PO must be P-PO1516

Regards,

K.Ramasamy