jquery-datatables-rails 3.1.1 question (yes, I realize a bit out of scope)

I keep seeing this in my console log:
GET http://localhost:3000/assets/images/sort_both.png 404 (Not Found)
jquery.dataTables.js?body=1:4246 GET http://localhost:3000/assets/images/sort_desc.png 404 (Not Found)
jquery.js?body=1:5996 GET http://localhost:3000/assets/images/sort_asc.png 404 (Not Found)

Is it hardcoded somewhere, or easily overridable, to specify "where" it should be getting these images as a .js option?