auto-complete: page-next, page-previous

gistfile1.txt

(define-key ac-complete-mode-map (kbd "C-v") 'ac-my-page-next)
(define-key ac-complete-mode-map (kbd "M-v") 'ac-my-page-pre)

(defun ac-my-page-next ()
  (interactive)
  (when (ac-menu-live-p)
    (when (popup-hidden-p ac-menu)
      (ac-show-menu))
    (dotimes (counter (1- (popup-height ac-menu)))
      (popup-next ac-menu))
    ))

(defun ac-my-page-pre ()
  (interactive)
  (when (ac-menu-live-p)
    (when (popup-hidden-p ac-menu)
      (ac-show-menu))
    (dotimes (counter (1- (popup-height ac-menu)))
    (popup-previous ac-menu))
    ))