Javascript PHP Expert needed for a small fix.

Hello to all. We are in need of an expert in javascript and php to fix a small problem that we have. We have 2 html pages. The first html page is a landing page with a form inside. When the form is compiled and the "Submit" button is clicked, the user is redirected to the second html page that is a "Thank You" page. The "Thank You" page contains some javascript to track the visitors that came from the landing page. The problem is that the javascript that tracks the visitors is not working properly since it needs a unique PHP variable. An expert is needed to make the javascript work correctly and track correctly the visitors that come from the landing page, in the "Thank You" page. More details, the 2 pages and the correct code will be provided by Private Message here in GAF. An escrow will be created immediately when the provider has been chosen and will be payed only when the work is delivered and tested on our side.