Here`s a tip... web developers should always display script errors to themselves when developing. ;)JohnnyBravado2007-1-3 16:14:3
If you only have one store and one register then you should just go with one of the standard shrink-wrapped POS systems. Once you get into having a multi-register and multi-store configuration you will need to look at other options.
I would recommend Microsoft Point of Sale. It is inexpensive and has good support. Be aware that there are two POS applications from Microsoft. The Microsoft Point of Sale application can be purchased online from someone like Amazon. The other is much more expensive and is only sold by resellers.
Good luck! And when you are ready to go to a multiple store configuration let me know. :)