Have window focus/blur functions check if currentIndex is empty or null, and return 0 if it is
Have window focus/blur functions check if currentIndex is empty or null, and return 0 if it is

BYU-Open-Analytics/BYUOpenAssessments,BYU-Open-Analytics/BYUOpenAssessments,BYU-Open-Analytics/BYUOpenAssessments,BYU-Open-Analytics/BYUOpenAssessments