How to best deal with circular work flow?

Hello all. What is the best way to deal with request parameters when the work flow goes: page -> action -> same page? Ok, let me see if I can more accurately describe the situation. I have a form. Within that form, I have a table listing entities with a column of indexed checkboxes which map to

what's the best way to have an if/else clause?

I want to iterate over a set of beans, creating widget A if property is set, widget B if not. Therefore, I'm looking for an "if/else" structure. The closest thing I can find is and . I'm assuming that there is no straight forward way to implement an 'else' clause in tags, so I'm thinking that I