Exhibit B

                             JOINT FILING AGREEMENT

                     This Agreement is filed as an exhibit to Schedule 13G being
         filed by Potomac Capital Management LLC, Potomac Capital Management
         Inc., and Paul J. Solit in compliance with Rule 13d-1(k) of the
         Securities and Exchange Commission, which requires an agreement in
         writing indicating that the Schedule 13G to which this Agreement is
         attached is filed on behalf of the below-named entities, that they are
         each responsible for the timely filing of the Schedule 13G and any
         amendments thereto and for the completeness and accuracy of the
         information concerning such persons contained therein.

         Dated: August 18, 2003

                                            POTOMAC CAPITAL MANAGEMENT LLC


                                            By:   /s/ Paul J. Solit
                                                  -----------------
                                                  Paul J. Solit, Managing Member



                                            POTOMAC CAPITAL MANAGEMENT INC.


                                            By:   /s/ Paul J. Solit
                                                  -----------------
                                                  Paul J. Solit, President


                                                  PAUL J. SOLIT

                                            By:   /s/ Paul J. Solit
                                                  -----------------
                                                   Paul J. Solit