... - A list of strings, each the combination of a button name and click action for which the button's click-related script handlers should be run. Possible values: (list)
Button4Down
Button4Up
Button5Down
Button5Up
LeftButtonDown
LeftButtonUp
MiddleButtonDown
MiddleButtonUp
RightButtonDown
RightButtonUp
AnyDown - Responds to the down action of any mouse button
AnyUp - Responds to the up action of any mouse button