JSON

Java Standard Object Notion

It's a format, like XML.

go to http://json.org find all the information.
All the libraries for different languages.

json2.js is JSON parser library for JavaScript.
JSON.parse("blabla");
vs
eval('(' + "blabla" + ')');

JSON is safer and faster.

Tell me again why we want to use JSON.parse() instead of eval()?

Understand JSON.parse() eventually will use eval(), but before that, it will do some checking for you, so it's safer.

Here is a link for details.