seyhunak/twitter-bootstrap-rails — pull request #732 by otaq (2014-05-04 13:32:21+00:00)
Title: fix Empty string passed to getElementById().

according to:
https://github.com/shishirmk/bootstrap/commit/ecf0605f7a3d8406f2a06acd6250d146ecfb9592

this will fix the Empty string passed to getElementById(). in FireFox