Disable or Readonly with Select Dropdown

I noticed that when I used disable or readonly on select dropdown input fields nothing really changes. You can still select another item in the select list.

My goal is to allow the user to view the readonly or disabled data in the form, and only to be allowed to update the field of my choice.

Anyone have any ideas of how to prevent users inputing data into disabled or readonly inputs?

What about something like this:

 $('#selectID').prop('disabled',false);

Thank you for your time and suggests.