thomasdavis/w3cjs — pull request #1 by webignition (2012-07-26 12:28:57+00:00)
Title: Added setW3cCheckUrl, necessary for when running a copy of the W3C validator locally

You can install and run your own copy of the W3C HTML validator: http://validator.w3.org/docs/install.html. You'll need to be able to set the validator URL to take advantage of this.