code: function MenuItemImage (opts) {
      var normalI   = opts.normalImage,
          selectedI = opts.selectedImage,
          disabledI = opts.disabledImage,
          callback  = opts.callback
  
      var normalImage = new Sprite({file: normalI}),
          selectedImage = new Sprite({file: selectedI}),
          disabledImage = null
  
      if (disabledI) {
          disabledImage = new Sprite({file: disabledI})
      }
  
      MenuItemImage.superclass.constructor.call(this, {normalImage: normalImage, selectedImage: selectedImage, disabledImage: disabledImage, callback: callback})
  }
docs: @class
  MenuItem that accepts image files
  
  @memberOf cocos.nodes
  @extends cocos.nodes.MenuItemSprite
  
  @opt {String} normalImage Main image file to draw
  @opt {String} selectedImage Image file to draw when menu item is selected
  @opt {String} disabledImage Image file to draw when menu item is disabled