Lost password on my android phone

I FORGOT MY PASSWORD ON MY SAMSUNG GALAXY S. I BOUGHT A NEW SIM CARD TODAY AND WHEN I PUT IT IN NORTON SECURITY LOCKED THE PHONE AND SAID IT NEEDS A PASSWORD TO UNLOCK THE PHONE BUT IVE FORGOTTEN IT AND NOBODY ELSE KNOW IT EITHER. ITS AN EXPENSIVE PHONE AND NOW ITS USELESS. CAN ANYBODY HELP ME?