Disable standard webdynpro UI element dynamically

Hi All,

We have a requirement to make a standard UI button on MDG change request approval screen dynamically visible/invisible based on the approver.

Process: Whenever a Change requested is created and finalized processing is done, it is sent for approval. The approver opens the change request, where he has the option to Approve/Reject the change request. Our requirement is to make the 'Approve' button invisible for certain agents and provide them with only Reject option.

Technical Information for UI Element:

Application:                      USMD_CREQUEST_PROCESS

WebDynpro Component: FPM_OIF_COMPONENT        

Window Information:        FPM_WINDOW

View Information:             CNR_VIEW

Configuration ID:              USMD_CREQUEST_PROCESS_OIF

Information on Field:

Field ID:                           DYN_EL_MAIN_VA7_DEFAULT_ET19_ALTERNATE_FUNCTIONS_EL12_USMD_APPROVE

Type of UI Element:         BUTTON

UI Element Library:          STANDARD

Appreciate any help on this.

Thanks,

Nithin