run command as root within script

[Rick Weinbender <rwein@central-ph.k12.mo.us>]

Is there a way within a bash script to temporarily
su to the root user, then run some commands,
then go back to the original user?
*
Or can you temporarily (within a script), assign
the current user to have more rights, then take
away those rights?
bash scripting is fairly new to me.

Thanks,
-Rick