Hello, all. This is probably a very simple question.

First: My site has about 300 "listings" that is a company with a time, date, & very short 1 line description. Each listing appears several times across a 300 page site under different categories. I hope to increase the number of "listings" to over 500 in time.

To make things a little clearer each company listing(currently about 300 of them) will show up on different pages for a total of about 3000 times total.

So here is my question: can I use a VERY simple .js file for each company without slowing down my site or incurring search engine pennalties? or am I doomed to go nuts??

Thanks for any advice.