// http://code.google.com/p/jquery-json/downloads/list
        /*
        * jQuery JSON Plugin
        * version: 2.1 (2009-08-14)
        *
        * This document is licensed as free software under the terms of the
        * MIT License: http://www.opensource.org/licenses/mit-license.php
        *
        * Brantley Harris wrote this plugin. It is based somewhat on the JSON.org 
        * website's http://www.json.org/json2.js, which proclaims:
        * "NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.", a sentiment that
        * I uphold.
        *
        * It is also influenced heavily by MochiKit's serializeJSON, which is 
        * copyrighted 2005 by Bob Ippolito.
        */

        (function($) {
            /** jQuery.toJSON( json-serializble )
            Converts the given argument into a JSON respresentation.

        If an object has a "toJSON" function, that will be used to get the representation.
            Non-integer/string keys are skipped in the object, as are keys that point to a function.

        json-serializble:
            The *thing* to be converted.
            **/
            $.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")
                            name = '"' + k + '"';
                        else if (type == "string")
                            name = $.quoteString(k);
                        else
                            continue;  //skip non-string or number keys

                        if (typeof o[k] == "function")
                            continue;  //skip pairs where the value is a function.

                        var val = $.toJSON(o[k]);

                        pairs.push(name + ":" + val);
                    }

                    return "{" + pairs.join(", ") + "}";
                }
            };

            /** jQuery.evalJSON(src)
            Evaluates a given piece of json source.
            **/
            $.evalJSON = function(src) {
                if (typeof (JSON) == 'object' && JSON.parse)
                    return JSON.parse(src);
                return eval("(" + src + ")");
            };

            /** jQuery.secureEvalJSON(src)
            Evals JSON in a way that is *more* secure.
            **/
            $.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.");
            };

            /** jQuery.quoteString(string)
            Returns a string-repr of a string, escaping quotes intelligently.  
            Mostly a support function for toJSON.
    
        Examples:
            >>> jQuery.quoteString("apple")
            "apple"
        
        >>> jQuery.quoteString('"Where are we going?", she asked.')
            "\"Where are we going?\", she asked."
            **/
            $.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 + '"';
            };

            var _escapeable = /["\\\x00-\x1f\x7f-\x9f]/g;

            var _meta = {
                '\b': '\\b',
                '\t': '\\t',
                '\n': '\\n',
                '\f': '\\f',
                '\r': '\\r',
                '"': '\\"',
                '\\': '\\\\'
            };
        })(jQuery);