(function ($) {
    $.toJSON = function (o) {
        if (typeof(JSON) == 'object' && JSON.stringify) return JSON.stringify(o);
        var type = typeof(o);
        if (o === null) return "null";
        if (type == "undefined") return undefined;
        if (type == "number" || type == "boolean") return o;
        if (type == "string") return $.quoteString(o);
        if (type == 'object') {
            if (typeof o.toJSON == "function") return $.toJSON(o.toJSON());
            if (o.constructor === Date) {
                var month = o.getUTCMonth() + 1;
                if (month < 10) month = '0' + month;
                var day = o.getUTCDate();
                if (day < 10) day = '0' + day;
                var year = o.getUTCFullYear();
                var hours = o.getUTCHours();
                if (hours < 10) hours = '0' + hours;
                var minutes = o.getUTCMinutes();
                if (minutes < 10) minutes = '0' + minutes;
                var seconds = o.getUTCSeconds();
                if (seconds < 10) seconds = '0' + seconds;
                var milli = o.getUTCMilliseconds();
                if (milli < 100) milli = '0' + milli;
                if (milli < 10) milli = '0' + milli;
                return '"' + year + '-' + month + '-' + day + 'T' + hours + ':' + minutes + ':' + seconds + '.' + milli + 'Z"';
            }
            if (o.constructor === Array) {
                var ret = [];
                for (var i = 0; i < o.length; i++)
                ret.push($.toJSON(o[i]) || "null");
                return "[" + ret.join(",") + "]";
            }
            var pairs = [];
            for (var k in o) {
                var name;
                var type = typeof k;
                if (type == "number" || type == "boolean") name = '"' + k + '"';
                else if (type == "string") name = $.quoteString(k);
                else continue;
                if (typeof o[k] == "function") continue;
                var val = $.toJSON(o[k]);
                pairs.push(name + ":" + val);
            }
            return "{" + pairs.join(", ") + "}";
        }
    };
    $.evalJSON = function (src) {
        if (typeof(JSON) == 'object' && JSON.parse) return JSON.parse(src);
        return eval("(" + src + ")");
    };
    $.secureEvalJSON = function (src) {
        if (typeof(JSON) == 'object' && JSON.parse) return JSON.parse(src);
        var filtered = src;
        filtered = filtered.replace(/\\["\\\/bfnrtu]/g, '@');
        filtered = filtered.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']');
        filtered = filtered.replace(/(?:^|:|,)(?:\s*\[)+/g, '');
        if (/^[\],:{}\s]*$/.test(filtered)) return eval("(" + src + ")");
        else throw new SyntaxError("Error parsing JSON, source is not valid.");
    };
    $.quoteString = function (string) {
        if (string.match(_escapeable)) {
            return '"' + 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);
            }) + '"';
        }
        return '"' + string + '"';
    };
	$.isJSON = function (string) {
		var result, err;
		try {
			result = $.evalJSON(string);
		} catch(err) {
			return false;
		}
		return true;
	};
    var _escapeable = /["\\\x00-\x1f\x7f-\x9f]/g;
    var _meta = {
        '\b': '\\b',
        '\t': '\\t',
        '\n': '\\n',
        '\f': '\\f',
        '\r': '\\r',
        '"': '\\"',
        '\\': '\\\\'
    };
})(jQuery);