Hi I use Fidder to test bug fixes directly on non development environments. It allows you to intercept the bogus javascript file and replace it by any other content you specify without needing to deploy any files.
The problem is that I just use this feature from Fiddler, and the interface is not very user friendly (specially if you need to replace/intercept more than one file, it gets quickly tedious).
Is there an alternative software with the same feature and more suer friendly/productive ? Or even better, one that integrates easily with your IDE (personaly I use eclipe) ?