[Quickform]

Hi, I'm freezing my quickform after submittion, so users can see what they entered. but I want certain elements users did not fill in, not to show anymore on that form. at first I tought I'll just put those addELement in an if, but then I realized that I also have a "change" button that enabels users to go back and change their values. in this case those elements are also gone, and that's not the point. any way to hide a quickform element? thx