Javascript in Sidebar and Posting not function for User

Hello together,
i have startet a projekt with some friends and now one of them told me that he couldn’t use a Javascript in his account, not in the sidebar or posting.

I tried automatically at my Superadmin Account and it was function. After a small discussion i tried with a secont account and there the Javascript was always deletet.
So i think normal User, even with admin rights, don’t have the permission to use Javascript.

Is there a way that i can activate Javascript for all or only some user? Perfect would be, if i could check, or uncheck a user of using Javascript.

regards
Sascha