p
  = f.check_box :hide, disabled: @role.users_visibility != 'members_of_visible_projects'
  em.info
    = t(:info_hidden_roles_html)

javascript:
  $(function() {
    $('#role_users_visibility').change(function() {
      var uv = $("#role_users_visibility").val();
       if (uv == 'members_of_visible_projects') {
        $("#role_hide").prop('disabled', false);
       } else {
         $("#role_hide").prop('checked', false);
         $("#role_hide").prop('disabled', true);
       }
    });
  });