Coding for a functional Button on Input Form

[wscwt01]

I have a single Form which allows user to create a new Gift Voucher record.

 

It is split into 3 input areas Voucher Details, Payment Details and Delivery Details.

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I want to add a button on the Payment details section which when activated will copy some of the entered fields from the Payment section to some of the fields in the Delivery section as follows: -

 

FROM PAYMENT SECTION                 TO                  DELIVERY SECTION

 

PurchaserName                                                            DeliveryName

PAddressLine1                                                              DAddressLine1

PAddressLine2                                                              DAddressLine2

PCounty                                                                         DCounty

PPostCode                                                                     DPostCode

 

I am using a Code Building product called PHP Runner which when you add a button gives you a properties widget as per attachment in which to place your bespoke code.