Best way to register to vote in NJ

So this seems to be the official form (BURLINGTON COUNTY):

http://www.nj.gov/state/elections/form_pdf/voter-regis-forms/76-voter-registration-english-burlington.pdf

I can't seem to find any info about registering online in NJ, but then I came across this:

http://voteforbernie.org/register-to-vote/

Can one legally register to vote in NJ using voteforbernie.org? The two forms don't even appear similar.

EDIT: Here is the page where you can select your county and get to the official forms:

http://www.nj.gov/state/elections/voting-information.html