Fillable forms duplicate text field manipulation

I created a form with some user-inputed text fields. Then, I created duplicates of those text fields, because I want one set to be user-inputed (I set this field to have a gray field and the font to courier) and the "output" to be the second set of fields, where I have maniuplated that set to have special prefixes (simple java scripts) and fonts. It all works perfectly except for one thing: I want the second set of fields to be read-only. I haven't been able to separate this restriction: either they are both read-only, or not. Is there a work around?