Echo JS 0.11.0

Although you specifically asked for ‘tutorial sites’ I’d like to recommend two books;

[‘JavaScript – The Good Parts’ by Douglas Crockford] [0] and [‘Eloquent JavaScript’ by Marijn Haverbeke] [1].

If you’re looking for video tutorials then there are plenty of good (and free) resources available on YouTube.

[0] http://www.amazon.com/JavaScript-Good-Parts-Douglas-Crockford/dp/0596517742/
[1] http://eloquentjavascript.net/