var JSON;
if(!JSON) JSON = {};

(function () {

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

    if(typeof Date.prototype.toJSON !== 'function') {
        Date.prototype.toJSON = function (key) {
            return isFinite(this.valueOf()) ? this.getUTCFullYear() + '-' + f(this.getUTCMonth() + 1) + '-' + f(this.getUTCDate()) + 'T' + f(this.getUTCHours()) + ':' + f(this.getUTCMinutes()) + ':' + f(this.getUTCSeconds())		+ 'Z' : null;
        };

        String.prototype.toJSON      =
            Number.prototype.toJSON  =
            Boolean.prototype.toJSON = function (key) {
                return this.valueOf();
            };
    }

    var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
        escapable = /[\\\"\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) {
        escapable.lastIndex = 0;
        return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
            var c = meta[a];
            return typeof c === 'string'
                ? c
                : '\\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(Object.prototype.toString.apply(value) === '[object Array]') {
                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) {
                    if(typeof rep[i] === 'string') {
                        k = rep[i];
                        v = str(k, value);
                        if(v) partial.push(quote(k) + (gap ? ': ' : ':') + v);
                    }
                }
            } else {
                for(k in value) {
                    if(Object.prototype.hasOwnProperty.call(value, k)) {
                        v = str(k, value);
                        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;
        }
    }

    if(typeof JSON.stringify !== 'function') {
        JSON.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});
        };
    }

    if(typeof JSON.parse !== 'function') {
        JSON.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.prototype.hasOwnProperty.call(value, k)) {
                            v = walk(value, k);
                            if(v !== undefined) {
                                value[k] = v;
                            } else {
                                delete value[k];
                            }
                        }
                    }
                }
                return reviver.call(holder, key, value);
            }

            text = String(text);
            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');
        };
    }
}());