cross browser getter setters in javascript?

get-set.coffee

# http://annevankesteren.nl/2009/01/gettters-setters
# http://antimatter15.com/wp/2010/02/experiment-cross-browser-javascript-getters-and-setters/
# http://download.dojotoolkit.org/release-1.3.0/dojo-release-1.3.0/dojox/lang/observable.js
# http://webreflection.blogspot.com/2011/02/btw-getters-setters-for-ie-6-7-and-8.html
# https://gist.github.com/189354
# http://webreflection.blogspot.com/2011/03/rewind-getters-setters-for-all-ie-with.html
# http://code.google.com/p/vbclass/
# http://code.google.com/p/vbclass/source/browse/#svn%2Ftrunk%2Fmin
# https://github.com/eligrey/Xccessors/blob/master/xccessors-legacy.js
# http://jsperf.com/getter-setter

unless Object.defineProperty
  if ({}).__defineGetter__ and false
    Object.defineProperty = (obj, prop, desc) ->
      for i of desc
        if i is "get"
          obj.__defineGetter__ prop, desc.get
        else obj.__defineSetter__ prop, desc.set  if i is "set"

    window.getset.type = 1
  else
    Object.defineProperty = (obj, prop, desc) ->
      for i of desc
        if i is "get"
          obj["__get_" + prop] = desc.get
        else obj["__set_" + prop] = desc.set  if i is "set"

    window.getset.type = 2

test = {}

Object.defineProperty test, "description",
  get: ->
    @desc + " and stuff added because of the awesome getter"

  set: (val) ->
    @desc = val + " stuff added for setter "

test.description = "Absolutely delicious"
alert test.description