Hit test problems

I decided to do a basic game, just for fun. Programming the whole thing took me barely any time, but once i had it going i realized i had a problem. I need to do a hit test for a movie clip inside another movie clip. The game is a timing game, jumping over hurdles, but it is seen from above. I basically need a way to detect if the player is touching the hurdle in the first and last frames few frames of the jump animation.