If you're into buddy cop stories based on '80s television
programs, then this weekend will be right up your alley.
Opening in theaters nationwide is "21 Jump Street." Based on the
popular TV show that ran from 1987-1991, "Street" will be facing
some tough competition from "The Lorax." The Dr. Seuss tale has
wracked up $130 million since its opening, good enough for two
straight No. 1 spots.  Can an R-rated comedy take on a family-
friendly animation flick? Let's take a look in Moviefone's
Weekend Movie Preview.   "21 Jump Street"  What's the story:
Jonah Hill and Channing Tatum star as Schmidt and Jenko, two
police officers fresh out of the police academy. However, after
they screw up an arrest, they are forced to join Jump Street --
an undercover team that sends young-looking cops into high
schools to take down student drug rings. Unfortunately, when
Schmidt and Jenko head back to 12th grade, they discover that a
lot has changed since they were last there.  Box office
prediction: R-rated comedies tend to hav