"Apply" button on Supplier banking details

 Hi ,

Can someone assist or advise ?

I need to link the "Apply" button to a warning , basically when a user tries to update the supplier banking details - if i have not loaded him as a initiator he will get the following message "you are not linked to a valid approver, update not allowed" but the "Apply" button is still available - therefore he can still update the details with out it going for approval .

Therefore when ever a user gets the Warning - the "Apply" button must be disabled - be greyed out .

Not sure if im allowed to ask questions on these discussions(Im new) , hope i get a response . Thanx !