 
       # Don't need to do anything if we're not actually stuck
       return if !@is_stuck
-
 
       ######
       # HORIZONTAL ADJUSTMENTS


    destroy : -> 
      $(window).off ".plugin_stickytopbottom-#{@my_id}"
      $.removeData @$el[0], "plugin_stickytopbottom"
      @$el = null



    #    if scrolled past bottom of element, position bottom of element at bottom of viewport
    #      (stick to bottom)
    update : -> 

      if !@$el
        console.error('sticky element has disappeared!!')
        @destroy()
        return

      container_top = @options.container.offset().top 
      viewport_top = (document.documentElement.scrollTop || document.body.scrollTop)
