3 Replies
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Just quickly looking through some of the source of the site you, the creator is using a jquery pack from http://fancybox.net. The function appears to be called upon within articulate (user.js) using a "getDLCTransition('lesson');" for their switch statement define within the dlc_lesson_transition.js .

I would suggest taking a look at the source for a better view (i.e., "inspect element", "show page source").