Change Access level when button is clicked!

Hello,
if there is a way ?

it is possible to implement,
but to support it is not trivial , it would a feature that people will complain it is incomplete or ... or ...

Implementation
1. (very easy) make sure jQuery is loaded
2. (very easy) call onDisplayField() function to create the 'edit' form field(s) of the field
3. (very easy) output the field inside a basic form with a submit button (the alternative is to alter the code of the field)
4. (easy) create a PHP script that will call onBeforeSaveField() of the and then it will update th field in the DB (2 tables the (a) field-values table and the version-field-values table of latest version)