code: function(e) {
          if (this.enableKeys) {
              var kc = Event.getCharCode(e);
  
              switch (kc) {
                  case 0x25: // left
                  case 0x26: // up
                  case 0x27: // right
                  case 0x28: // down
                  case 0x24: // home
                  case 0x23: // end
                      Event.preventDefault(e);
                      break;
                  default:
              }
          }
      }
docs: Executed when a keypress event happens with the control focused.
  Prevents the default behavior for navigation keys.  The actual
  logic for moving the slider thumb in response to a key event
  happens in handleKeyDown.
  @param {Event} e the keypress event