applescript to toggle the fn key

osascript fn toggle

--Check if GUI Scripting is Enabled
tell application "System Events"
    if not UI elements enabled then
        set UI elements enabled to true
    end if
end tell

--Enable/Disable "Use all F1, F2, etc. keys as standard function keys" option in Keyboard & Mouse Preference pane and close System Preferences
tell application "System Events"
    tell application "System Preferences"
        reveal anchor "keyboardTab" of pane "com.apple.preference.keyboard"
    end tell
    set bbox to checkbox 1 of tab group 1 of window 1 of application process "System Preferences"
	click bbox
	set b to value of bbox
	if b is 0
		set q to "Apple"
	else
		set q to "Fn"
	end if

end tell
if application "System Preferences" is running then
    tell application "System Preferences" to quit
end if
return q