stringifyJSON.js

$.fn.extend({
    stringify:  function stringify(obj) { //$.parseJSON() is available in jQuery1.4+;
        if ("JSON" in window)  return JSON.stringify(obj);

        var t = typeof (obj);
        if (t != "object" || obj === null) {
            if (t == "string") obj = '"' + obj + '"';
            return String(obj);
        } else {
            var n, v, json = [], arr = (obj && obj.constructor == Array);
            for (n in obj) {
                v = obj[n];
                t = typeof(v);
                if (obj.hasOwnProperty(n)) {
                    if (t == "string") {
                        v = '"' + v + '"';
                    } else if (t == "object" && v !== null){
                        v = jQuery.stringify(v);
                    }
                    json.push((arr ? "" : '"' + n + '":') + String(v));
                }
            }
            return (arr ? "[" : "{") + String(json) + (arr ? "]" : "}");
        }
    }
});