function numpad(str,mode)
	if mode then
		if mode == "control" then
			-- do stuff you want to do when CTRL is held
			return true
		elseif mode == "alt" then
			-- do stuff you want to do when ALT is held
			return true
		elseif mode == "shift" then
			-- do stuff you want to do when SHIFT is held
			return true
		end
	end

	-- lowercase the string for ease of comparison.
	str = str:lower()

	-- if mode isn't set or we don't know what to do with the mode supplied, we move
	-- on to the rest of the script.
	if str == "n" then
		-- do things we want to do when 8 is pressed.
		return true
	elseif str == "s" then
		-- do things we want to do when 2 is pressed.
		return true
	elseif str == "e" then
		-- do things we want to do when 6 is pressed.
		return true
	else
		-- if the supplied str isn't a direction we know what to do with, we don't do anything.
		return false
	end

end