I'm very sorry for my bad english. Seems like nobody understands what I mean, so I'd like to try to explain my problem in a different way:
In order to define a value (like "how many sites made" in the joomlapolis profile) for the user profile I can only select a text input, but what I would like to achieve is to restrict the input to numbers only and to reject other letters. On static html sites I used to help me with a javascript function, but I have no idea where in the Community Builder I could insert such a component to make it accessible to the site admins.
I am really hoping for your help.
Thank you,
B.