That JavaScript is part of Google Analytics (which is used to track page accesses). The error occurs if the script can't be loaded from
http://www.google-analytics.com/; maybe you have an ad blocker or personal proxy running that prevents the script from being loaded? The error is harmless, though, and doesn't impact the
applet.
Follow Marilyn's advice and check the Java Console for error messages.
By the way, what do you mean by "round" 13? Each set has only 12 questions; are you saying you went through 12*13=156 questions?
[ August 19, 2008: Message edited by: Ulf Dittmer ]