There is a script on the top left hand side on these two websites Tyres - Up to 40% Cheaper & FREE Mobile Fitting - UK's No.1 - etyres
and UK Tyres Online: Cheap Car Tyres Shop | Blackcircles.com
where visitors are able to perform searches for tires, and eventually make an order.
How is such a script built? Is it an excel database?
How does it work?
Any info you can provide would be appreciated.