Convert javascript into wordpress plugin

I bought this script: [login to view URL] And I'd like it added to my wordpress site. The author posted this as a solution: Adding this script to your wordpress theme is really simple. Just add the scripts to your header.php. Then in your contact page (or any page that you like) add a new DIV with an ID (same id which is passed to the script in the [login to view URL] file) That's basically it.