Function for enabling or disabling emacs bars

[angelomolina]

Would like to have a function that enables or disables emacs bars.  Perhaps 
using an optional
argument for this?

(defun emacsbars ()
  "Enables or disables Emacs Bars"
  (menu-bar-mode 1)
  (tool-bar-mode 1)
  (scroll-bar-mode 1))