sory I will write in english bz i am so slowly in arabic.
first the two barreries connected to the cans produce electric field, in fact non uniform electric field in the atmosphere around the two batteries. the two batteries on the CD also produce electric field, with the aid to the electromagnetic field produced by the antenna of the mobile, an electric current pass in the coin so produces an electric field . the all electric fields around the coin consist the so called attraction or repulsion making the coin floating up and down. again thanks alot.