Simple epos website in classic asp / javascript / ajax

Need a simple web-based EPOS (Point of Sale) system for use across different retail shops. The EPOS solution should have the ability to manage workshop/repair orders as well as standard retail sales transactions, returns, layaways, discounts, different VAT rates etc. Needs to be multi-currency and multi-store. We are a small independent retailer of mobile-phones and electronics with more than one shop selling / unlocking and repairing mobile phones and computers. We need a web-based EPOS system developed in classic-asp / javascript / ajax with MS-SQL database for storing data. The system should support peripherals like thermal-receipt printer (for shop sales), invoice-printing on normal printer (for bulk sales), barcode scanner input, standard electronic till-drawer etc. Also, some sort of ability to record and process chip-and-pin card / electronic transactions. At some shops we have chip-and-pin machines (seperate) - but would also like the ePOS system to optionally process electronic payments through our Protx (SagePay) gateway. Something like [login to view URL] This is a perfect example of what we're looking for.