'JSON' is undefined error in JavaScript in Internet Explorer
Maybe it is not what you are looking for, but I had a similar problem and i solved it including JSON 2 to my application:
https://github.com/douglascrockford/JSON-js
Other browsers natively implements JSON but IE < 8 (also IE 8 compatibility mode) does not, that's why you need to include it.
Here is a related question: JSON on IE6 (IE7)
UPDATE
the JSON parser has been updated so you should use the new one: http://bestiejs.github.io/json3/
<!DOCTYPE html>
Otherwise IE8 is not acting right. Also you should use:
<meta http-equiv="X-UA-Compatible" content="IE=EDGE" />
Please add json2.js in your project . i was faced the same issue i have fixed.
please use the link: https://raw.github.com/douglascrockford/JSON-js/master/json2.js
and create new file json.js, copy the page and past into newly created file , and move that file into your web application.
I hope it will work.