variable and function definitions for a javascript-based lisp?

gistfile1.txt

;; javascripty
(var foo 42)
(var inc (function (x) (+ x 1)))
(function dec (x) (- x 1))

;; clojurey
(def foo 42)
(def inc (fn [x] (x + 1)))
(defn dec [x] (- x 1))

;; schemey
(define foo 42)
(define inc (lambda (x) (+ x 1)))
(define (dec x) (- x 1))

I think the only ways the javascripty solution could work is if it always create a function by assigning it to a var, or if I am able to determine if the function being created is in the statement or expression position. I don't want to do the former because the goal is to be bi-directional. "Familiarity" asside, I like the schemey approach here.