datasift/storyplayer — pull request #50 by asgrim (2013-08-13 16:10:10+00:00)
Title: Fixes finding elements if they have a negative location (e.g. 

An example of this is if the element is still *displayed* on the page but not visible on the screen, for example due to browser dimensions during the story playing.

If an element has position x=0,y=0, this check will still fail of course.