a way to reset the postgres password to nothing..

hi...

i've set up a postrges db, and i can get to it using a user/passwd. however,
when i su into the postgres user, and i try to do a 'psql -U postgres' it
prompts me for the password.. i have no idea what the password would be.. i
created everything, and thought i had just given it a blank password...

any ideas as to how i can change this, or reset the passwd to nothing...

thanks

bruce
bedouglas(at)earthlink(dot)net