 
   onClickNextFrame: ->
     nextFrame = +(document.getElementById('frame-slider').value) + 1
-    if nextFrame is @numFrames
-      @onClickFourUp()
-    else
-      @activateFrame(nextFrame)
+    @activateFrame(nextFrame)
 
   onClickReset: ->
     @setOfSightings = []

    @updateIconsForCreateMark(surfaceIndex)

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

  onKeyDown: (e) =>

    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]
