The fans move allright, it's just that what you see is actually the IGVs; Inlet Guide Vanes (or something like that)
Their purpose is simply to direct the airflow so it hits the fan at the most efficient angle, also they form a kind of structural support for the forward part of the compressor stage...but to describe that more detailed is beyond my knowledge
There are other engines which have these IGVs, but they are located after the N1 stage, hence you can't seee them :)
Here's a great pic of the IGV's
http://www.airliners.net/open.file/304668/L/