# File lib/as_event.rb, line 75
  def self.for_jaxis(joynum, axis)
    raise "No such joystick" unless (0..(Joysticks.length)).include?(joynum)
    raise "No such axis" unless (0..(Joysticks[joynum].axes)).include?(axis)
    axis<<4 | (7 + joynum)
  end