(*
ToggleGrayScaleMode for MacOSX 10.9 Mavericks
works as of 15 april 2014

This is an AppleScript UI script to toggle GrayScaleMode in System Preferences.
I am red-green colorblind and grayscale helps a lot...

Works for me. Hope it can be usefull for you.

Mike
mlongval@gmail.com
*)


tell application "System Preferences"
	activate
	tell application "System Events"
		tell application process "System Preferences"
			set frontmost to true
			delay 1
			
			click menu item "Accessibility" of menu "View" of menu bar item "View" of menu bar 1 of application process "System Preferences" of application "System Events"
			-- add delay if needed
			delay 1
			
			-- The MAGIC word here is SELECT .... you are SELECTing a row NOT CLICKing a row !!!!!!!!!
			select row 2 of table 1 of scroll area 1 of window "Accessibility" of application process "System Preferences" of application "System Events"
			
			-- Now you can CLICK the checkbox 			
			click checkbox "Use grayscale" of window "Accessibility" of application process "System Preferences" of application "System Events"
			-- add delay if needed
			delay 1
			
			click menu item "Quit System Preferences" of menu "System Preferences" of menu bar item "System Preferences" of menu bar 1 of application process "System Preferences" of application "System Events"
			
		end tell
	end tell
end tell