if (!this.JSON) {

    JSON = function () {

        function f(n) {    // Format integers to have at least two digits.
            return n < 10 ? '0' + n : n;
        }

        Date.prototype.toJSON = function () {

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


        var escapeable = /["\\\x00-\x1f\x7f-\x9f]/g,
            gap,
            indent,
            meta = {    // table of character substitutions
                '\b': '\\b',
                '\t': '\\t',
                '\n': '\\n',
                '\f': '\\f',
                '\r': '\\r',
                '"' : '\\"',
                '\\': '\\\\'
            },
            rep;


        function quote(string) {

            return escapeable.test(string) ?
                '"' + string.replace(escapeable, function (a) {
                    var c = meta[a];
                    if (typeof c === 'string') {
                        return c;
                    }
                    c = a.charCodeAt();
                    return '\\u00' + Math.floor(c / 16).toString(16) +
                                               (c % 16).toString(16);
                }) + '"' :
                '"' + string + '"';
        }


        function str(key, holder) {

            var i,          // The loop counter.
                k,          // The member key.
                v,          // The member value.
                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 (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) {
                        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 (space) {

                    if (typeof space === 'number') {
                        for (i = 0; i < space; i += 1) {
                            indent += ' ';
                        }

                    } else if (typeof space === 'string') {
                        indent = space;
                    }
                }

                if (!replacer) {
                    rep = function (key, value) {
                        if (!Object.hasOwnProperty.call(this, key)) {
                            return undefined;
                        }
                        return value;
                    };

                } else if (typeof replacer === 'function' ||
                        (typeof replacer === 'object' &&
                         typeof replacer.length === 'number')) {
                    rep = replacer;
                } else {
                    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);
                }

                if (/^[\],:{}\s]*$/.test(text.replace(/\\["\\\/bfnrtu]/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');
            },

            quote: quote
        };
    }();
}