Form Validation to check if an action in the table has been selected

I have a form that builds the entitlements to select for requesting, it also has a remove current access:

When the role and the locations are selected:

Since this either add or remove actions can be done, how can I use JSP form validation to see if "Added" has been clicked on?

I have built a JSP form based on the example in the forums, but I do not know exactly what to check to see if "Added" has been selected.

Any help is appreciated. =)

Thanks.