Installing JSHint - tooltwist/documentation GitHub Wiki
JSHint is a project forked of the well know JSLint product, a tool used to check Javascript code. Apparently JSLint reports too many errors to be always useful, and it is hard to turn them off. JSHint may solve this issue, but as yet I haven't checked it (Phil May 2013).
Install JSHint by following the instructions on http://github.eclipsesource.com/jshint-eclipse/install.html