   x = b.dateToPixelOffset b.getCenterVisibleDate().getTime()
   y = undefined  # reading the source, it seems that y is not used
   tl.zoom zoomIn, x, y, $("div.timeline-band")[0]
+  return
 
 
 #### Get a function to check the input checkbox and start/stop auo-reload

    eventSource.loadJSON(timeline_data, url)
    tl.layout()
    callback() if callback?


panTimeline = (tl, delta) ->

    else
      checkbox.attr "checked", "checked"
    callback() if callback?
    return


setupKeybinds = (keyboardInput, tl) ->
