how to use PostGIS with Postgres

[Yantao Shi <y.shi@xxxxxxxxxxxxx>]

We have PostGIS 1.1.1 installed  and I am trying to get it to work with 
Postgres8.1.1 on our system.

Could some one give me a small sample script that lets me connect to 
postgis from Postgres?

I have never used postgis before. I need to test its geo-spatial 
functionality with Postgres.

Thanks a lot,

Yantao