Bash scripting

[Bryce C]

Can anyone tell me how, in a bash script, I can move the contents of
variable $2 to variable $1 and so on?  I'm writing a bash script to
update some stuff but I'd like to be able to type 
script.sh noblah noit nothat
but everything is defaulted yes.
Currently., my script is something like
case "$1" in
	noblah)
		echo Not doing blah.
		$1="$2"
	;;
	*)
		echo Doing blah;
	;;
esac
case "$1" in
	nothis)
		echo Not doing this.
		$1="$2"
	;;
	*)
		echo Doing this
	;;
esac

That sort of thing.  Can anyone help?  Perhaps a nice online reference? 
No books though, I don't have the money or time to buy one.

Thanks,
-- 
Bryce Chidester
Network Administrator
CoBryce Communications
Bryce AT BryceCo DOT Net
http://www.bryceco.net