i work on a form, who a user can add details about a customer and choose products wich the customer bought.

For this i used an ajax autocomplite script i found on this page : click here

The function works nice already. And i get the details and product as email, but i would expand like that:

If the user chose a product (by clicking on a product), the table row should be dublicated and the user should add another product. 

I changed already small things but the main code is on the linked page already.

How i can realize that ?