This works as follows:
The div where the input fields for the subjects live got an id. The script now listens to all keypresses in this div, but only does something if it is within an INPUT field. If it is an INPUT field within this div, it looks for keyCode 13. If it is 13, preventDefault() is triggered. Else nothing happens.
* New ID: Audible ASIN
Audible belongs to Amazon BUT they do not share the same IDs. The Audible ASIN of an audiobook is never the same as the Amazon ASIN.
Yeah, I know, Amazon is great. The fact that the ASIN is a good distinction for different works and editions bothers me more than I will ever be willing to admint.
* New ID "ISFDB"
Internet Speculative Ficiton Database ID for books and authors.
Links to the entry if set.
* Added aasin to test
Added aasin to test
* the answer expects more emptxy fields...