Ssrs 2010/2012 optional parameters

In an ssrs 2010 or ssrs 2012 report, I am wondering if there is a way for parameters to be visible or not visible depending upon an expression.

In other words, this rdl will allow the user to select which individual report(s) they want to see or all the reports at the same time. Thus if the user select report #2 and only parameter #1 and #4 are needed for that report, is there a way to show only the parameters # ! and #4?

Thus can you tell me if this is possible? If not, can you tell me how to accomplish my goal?

found this is not possible