HTML5 Fullscreen mode script

/ -------------- This iframe can contain code under -------------
%iframe{"src" => "http://haml.info",
  "allowfullscreen" => "true",
  "mozallowfullscreen" => "true",
  "webkitallowfullscreen" => "true",
  "scrolling" => "no",
  "frameborder" => "0",
  "border" => "0",
  "hspace" => "0",
  "vspace" => "0",
  "marginheight" => "0",
  "marginwidth" => "0",
  "width" => "200",
  "height" => "100"}

/ -------------- This code can require fullscreenmode(dont forget to use doctype and body element :P) --------------
%hr

%section#game{"ng-app"=>"Haven"}

  %header.root{"top-bar" => ''}

  %section.root{"ng-view" => '', "unrightclickable" => ''}

  %div{"message" => ''}
  %div{"overlay" => ''}
  %div{"game-hints" => ''}

%button#blabla{onclick: 'toggleFullScreen()'}
  blabla

:coffee
  # example 1: expand sertain element
  toggleFullScreen = ->
    if not document.mozFullScreen and not document.webkitFullScreen
      if videoElement.mozRequestFullScreen
        videoElement.mozRequestFullScreen()
      else
        videoElement.webkitRequestFullScreen Element.ALLOW_KEYBOARD_INPUT
    else
      if document.mozCancelFullScreen
        document.mozCancelFullScreen()
      else
        document.webkitCancelFullScreen()
    return
  videoElement = document.getElementById("game")

  document.addEventListener "keydown", ((e) ->
    toggleFullScreen()  if e.keyCode is 13
    return
  ), false

:coffee
  # example 2: expand whole document
  window.get_first_of_this = (obj, vals) ->
    call = call or false

    has_one = null

    for name in vals
      item = obj[name]
      if item?
        has_one =
          the_one: item
          name: name
        break;

    has_one

  window.toggleFullScreen = ->
    elementsList = [
      "fullscreenElement" # alternative standard method
      # current working methods
      "mozFullScreenElement"
      "webkitFullscreenElement"
      "msFullscreenElement"
    ]
    requestList = [
      "requestFullscreen"
      "msRequestFullscreen"
      "mozRequestFullScreen"
      "webkitRequestFullscreen"
    ]
    exitList = [
      "exitFullscreen"
      "msExitFullscreen"
      "mozCancelFullScreen"
      "webkitExitFullscreen"
    ]

    unless get_first_of_this(document, elementsList)
      _t = document.documentElement
      item = get_first_of_this(document.documentElement, requestList)
      args = if item.name is "webkitRequestFullscreen"
        [Element.ALLOW_KEYBOARD_INPUT]
      else
        []
    else if item = get_first_of_this(document, exitList)
      _t = document
      args = []

    item.the_one.apply _t, args if item
    return