Advanced rollovers

can someone explain to me why on this sites advanced rollover tutorial the tellTarget command is pointed to /rollover… because when you download the source the movie clip it’s being pointed to isn’t called “rollover” it’s called “movie_clip” am i getting the target fromt he wrong place? I’m using flash mx2004 and where the guide says to get the target form i can’t find on mx2004

Tutorial here: http://www.kirupa.com/developer/flash5/advroll.htm