Build a Website

I am currently running an Osclass website but need some help adding a feature to the website that I don't know how to code. When a user goes to list a book on my website, I would like them to enter their book's ISBN number and then click "lookup". Then, using the database at [login to view URL], the Title and Author of the book will automatically fill in. Please only bid if you have worked on Osclass website before and if you can do this job ASAP. Budget is $50 Will only give out my website details once I choose the winner.