Conversion Tracking: clicks to outside website?
I'm trying to determine if our ad is resulting in purchases -- which unfortunately are currently being made on another website. So, I'd like to know if visitors who clicked on my ad are eventually clicking the link to the other website. Ideally, I would like to know if they then actually buy on that site. Can I use the conversion tracking code on a second website (not the one that is linked to from my ad)?
Thanks in advance for any help/advice!