Not sure where to get started with this (and I'm a jQuery beginner).  Would appreciate pointers on how to start or even what terms would be good for searching out answer/examples/...

I'd like to use a barcode scanner to grab an ISBN number for a book and a barcode number.  The values are straightforward to differentiate using regular expressions.  When scanning a number with the web page or a field as the focus, I'd like to grab the value, test it for what type of value it is and then add it to the appropriate form field.

Thanks for any suggestions!