if (!this.JSON) {
    JSON = function () {

        function f(n) {
             return n < 10 ? '0' + n : n;
        }

        Date.prototype.toJSON = function (key) {

            return this.getUTCFullYear()   + '-' +
                 f(this.getUTCMonth() + 1) + '-' +
                 f(this.getUTCDate())      + 'T' +
                 f(this.getUTCHours())     + ':' +
                 f(this.getUTCMinutes())   + ':' +
                 f(this.getUTCSeconds())   + 'Z';
        };

        var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
            escapeable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
            gap,
            indent,
            meta = {
                '\b': '\\b',
                '\t': '\\t',
                '\n': '\\n',
                '\f': '\\f',
                '\r': '\\r',
                '"' : '\\"',
                '\\': '\\\\'
            },
            rep;


        function quote(string) {
            escapeable.lastIndex = 0;
            return escapeable.test(string) ?
                '"' + string.replace(escapeable, function (a) {
                    var c = meta[a];
                    if (typeof c === 'string') {
                        return c;
                    }
                    return '\\u' + ('0000' +
                            (+(a.charCodeAt(0))).toString(16)).slice(-4);
                }) + '"' :
                '"' + string + '"';
        }


        function str(key, holder) {
            var i,
                k,
                v,
                length,
                mind = gap,
                partial,
                value = holder[key];
            if (value && typeof value === 'object' &&
                    typeof value.toJSON === 'function') {
                value = value.toJSON(key);
            }
            if (typeof rep === 'function') {
                value = rep.call(holder, key, value);
            }
            switch (typeof value) {
            case 'string':
                return quote(value);

            case 'number':
                return isFinite(value) ? String(value) : 'null';
            case 'boolean':
            case 'null':
                return String(value);
            case 'object':
                if (!value) {
                    return 'null';
                }
                gap += indent;
                partial = [];
                if (typeof value.length === 'number' &&
                        !(value.propertyIsEnumerable('length'))) {
                    length = value.length;
                    for (i = 0; i < length; i += 1) {
                        partial[i] = str(i, value) || 'null';
                    }
                    v = partial.length === 0 ? '[]' :
                        gap ? '[\n' + gap +
                                partial.join(',\n' + gap) + '\n' +
                                    mind + ']' :
                              '[' + partial.join(',') + ']';
                    gap = mind;
                    return v;
                }
                if (rep && typeof rep === 'object') {
                    length = rep.length;
                    for (i = 0; i < length; i += 1) {
                        k = rep[i];
                        if (typeof k === 'string') {
                            v = str(k, value, rep);
                            if (v) {
                                partial.push(quote(k) + (gap ? ': ' : ':') + v);
                            }
                        }
                    }
                } else {
                    for (k in value) {
                        if (Object.hasOwnProperty.call(value, k)) {
                            v = str(k, value, rep);
                            if (v) {
                                partial.push(quote(k) + (gap ? ': ' : ':') + v);
                            }
                        }
                    }
                }
                v = partial.length === 0 ? '{}' :
                    gap ? '{\n' + gap + partial.join(',\n' + gap) + '\n' +
                            mind + '}' : '{' + partial.join(',') + '}';
                gap = mind;
                return v;
            }
        }
        return {
            stringify: function (value, replacer, space) {
                var i;
                gap = '';
                indent = '';
                if (typeof space === 'number') {
                    for (i = 0; i < space; i += 1) {
                        indent += ' ';
                    }
                } else if (typeof space === 'string') {
                    indent = space;
                }
                rep = replacer;
                if (replacer && typeof replacer !== 'function' &&
                        (typeof replacer !== 'object' ||
                         typeof replacer.length !== 'number')) {
                    throw new Error('JSON.stringify');
                }
                return str('', {'': value});
            },
            parse: function (text, reviver) {
                var j;

                function walk(holder, key) {
                    var k, v, value = holder[key];
                    if (value && typeof value === 'object') {
                        for (k in value) {
                            if (Object.hasOwnProperty.call(value, k)) {
                                v = walk(value, k);
                                if (v !== undefined) {
                                    value[k] = v;
                                } else {
                                    delete value[k];
                                }
                            }
                        }
                    }
                    return reviver.call(holder, key, value);
                }
                cx.lastIndex = 0;
                if (cx.test(text)) {
                    text = text.replace(cx, function (a) {
                        return '\\u' + ('0000' +
                                (+(a.charCodeAt(0))).toString(16)).slice(-4);
                    });
                }
                if (/^[\],:{}\s]*$/.
test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@').
replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']').
replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
                    j = eval('(' + text + ')');
                    return typeof reviver === 'function' ?
                        walk({'': j}, '') : j;
                }
                throw new SyntaxError('JSON.parse');
            }
        };
    }();
}