     return if @el.attr('flicker') is "false"
     @showFrame(frame)
     @el.attr 'data-on-frame', frame
+    @nextFrame.prop 'disabled', if frame is (@numFrames-1) then true else false
 
   showFrame: (frame_idx) ->
     @el.find("#frame-id-#{i}").closest("div").hide() for i in [0...@numFrames]

    @updateIconsForCreateMark(surfaceIndex)

  onChangeFrameSlider: =>
    frame = document.getElementById('frame-slider').value
    @activateFrame(frame)

  onKeyDown: (e) =>


  onClickNextFrame: ->
    nextFrame = +(document.getElementById('frame-slider').value) + 1
    @activateFrame(nextFrame)

  onClickReset: ->
    @setOfSightings = []
