(defun toggle-scroll-bar (arg)
"Toggle whether or not the selected frame has vertical scroll bars.
-With ARG, turn vertical scroll bars on if and only if ARG is positive.
+With ARG, turn on vertical scroll bars if and only if ARG is positive.
The variable `scroll-bar-mode' controls which side the scroll bars are on
when they are turned on; if it is nil, they go on the left."
(interactive "P")
(defun toggle-horizontal-scroll-bar (arg)
"Toggle whether or not the selected frame has horizontal scroll bars.
-With ARG, turn vertical scroll bars on if and only if ARG is positive."
+With ARG, turn on horizontal scroll bars if and only if ARG is positive."
(interactive "P")
(if (null arg)
(setq arg