Question : Scripting help using LAST command

I'm trying to write a script that will output the login information for the last week (7 days). It doesn't look like there are too many options for this using the built-in switches with LAST. Was thinking I would probably have to GREP the output I receive but how would you specify to go back 7 days. I think it would especially get confusing when you are at the begining of the month and your 7 day query would flow into the previous month. Any help would be appreciated.

Thanks

Answer : Scripting help using LAST command

It's a filter:

last | script.pl

where script.pl is the name of the above script.