Dynamic Url

[sd]

Hello,
How would I display an image or text based on the value returned
from executing a cgi purely from javascript i.e. if 50 items are
displayed on a page, I would like to execute a url with 50 different
values passed to a function which would then execute an url and return
values which would be displayed along with each item that it
displayed.

For example if I provide product feedbacks for products that are
displayed on my partners websites I would want to give some javascript
to my partners site that would be executed to get an value from my
website and displayed along with the product that is displayed. IS
such a thing possible thru just javascript. Are there any other
alternatives.

Thanks
sd