display/hide parameter based on another parameter.

HSMorales

I have a report with three parameters.

1. System_ID
2. Employee_ID
3. Employee_Number

The report will be called from 2 different systems. (ABC and XYZ)
The system calling the report will send the first parameter System_ID a default value (either 'ABC' or 'XYZ' )

If System_ID = 'ABC' then I want the other 2 parameters hidden (They have default values) , else I want them to be not hidden so user can change them.

Parameters 2 and 3 are input parameters to a stored procedure.

How can I do this ?? Thanks
Birt 3.7.0