;; ex)
(require 'toggle-ansi-term-mode "ansi-term-util.el")
(add-hook `term-mode-hook
          `(lambda ()
             (progn
               (define-key term-raw-map "\C-t" `toggle-ansi-term-mode)
               (define-key term-mode-map "\C-t" `toggle-ansi-term-mode))))