url to popup a small browser window displaying other fields

Hi there -Please help.

I'm building a database of used cars. Which I want to display on my website.
All is going pretty well except for being able to click for more info.

I'd like a url or link on each record that allows me to click on it and popup a
new window with additional photo's etc from that record.

Please could someone explain in detail how to do this?
Also can it even be done.

Thanks in advance.