tinymce.full.js
function down() {
        var role = getRole(), parentRole = getParentRole();

        if (role == "menuitem" && parentRole == "menubar") {
          enter();
        } else if (role == "button" && getAriaProp('haspopup')) {
          enter({ key: 'down' });
        } else {
          moveFocus(1);
        }
      }
function down() {
        var role = getRole(), parentRole = getParentRole();

        if (role == "menuitem" && parentRole == "menubar") {
          enter();
        } else if (role == "button" && getAriaProp('haspopup')) {
          enter({ key: 'down' });
        } else {
          moveFocus(1);
        }
      }
function down ( ) { var role = getRole ( ) , parentRole = getParentRole ( ) ; if ( role == "menuitem" && parentRole == "menubar" ) { enter ( ) ; } else if ( role == "button" && getAriaProp ( 'haspopup' ) ) { enter ( { key : 'down' } ) ; } else { moveFocus ( 1 ) ; } }
Moves the focus to the up this is called by the down key.

@private
Moves the focus to the up this is called by the down key .