(function ($) {
    'use strict';
    var escape = /["\\\x00-\x1f\x7f-\x9f]/g,
	meta = {'\b': '\\b', '\t': '\\t', '\n': '\\n', '\f': '\\f', '\r': '\\r', '"': '\\"', '\\': '\\\\'},
    hasOwn = Object.prototype.hasOwnProperty;
    $.toJSON = typeof JSON === 'object' && JSON.stringify ? JSON.stringify : function (o) {
	if (o === null) {
	    return 'null';
	}
	var pairs, k, name, val,
	    type = $.type(o);
	if (type === 'undefined') {
	    return undefined;
	}
	if (type === 'number' || type === 'boolean') {
	    return String(o);
	}
	if (type === 'string') {
	    return $.quoteString(o);
	}
	if (typeof o.toJSON === 'function') {
	    return $.toJSON(o.toJSON());
	}
	if (type === 'date') {
	    var month = o.getUTCMonth() + 1,
		day = o.getUTCDate(),
		year = o.getUTCFullYear(),
		hours = o.getUTCHours(),
		minutes = o.getUTCMinutes(),
		seconds = o.getUTCSeconds(),
		milli = o.getUTCMilliseconds();
	    if (month < 10) {
		month = '0' + month;
	    }
	    if (day < 10) {
		day = '0' + day;
	    }
	    if (hours < 10) {
		hours = '0' + hours;
	    }
	    if (minutes < 10) {
		minutes = '0' + minutes;
	    }
	    if (seconds < 10) {
		seconds = '0' + seconds;
	    }
	    if (milli < 100) {
		milli = '0' + milli;
	    }
	    if (milli < 10) {
		milli = '0' + milli;
	    }
	    return '"' + year + '-' + month + '-' + day + 'T' +
		hours + ':' + minutes + ':' + seconds +
		'.' + milli + 'Z"';
	}
	pairs = [];
	if ($.isArray(o)) {
	    for (k = 0; k < o.length; k++) {
		pairs.push($.toJSON(o[k]) || 'null');
	    }
	    return '[' + pairs.join(',') + ']';
	}
	if (typeof o === 'object') {
	    for (k in o) {
		if (hasOwn.call(o, k)) {
		    type = typeof k;
		    if (type === 'number') {
			name = '"' + k + '"';
		    } else if (type === 'string') {
			name = $.quoteString(k);
		    } else {
			continue;
		    }
		    type = typeof o[k];
		    if (type !== 'function' && type !== 'undefined') {
			val = $.toJSON(o[k]);
			pairs.push(name + ':' + val);
		    }
		}
	    }
	    return '{' + pairs.join(',') + '}';
	}
    };
    $.evalJSON = typeof JSON === 'object' && JSON.parse ? JSON.parse : function (str) {
	return eval('(' + str + ')');
    };
    
    $.secureEvalJSON = typeof JSON === 'object' && JSON.parse ? JSON.parse : function (str) {
	var filtered =
	    str
	    .replace(/\\["\\\/bfnrtu]/g, '@')
	    .replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
	    .replace(/(?:^|:|,)(?:\s*\[)+/g, '');
	if (/^[\],:{}\s]*$/.test(filtered)) {
	    return eval('(' + str + ')');
	}
	throw new SyntaxError('Error parsing JSON, source is not valid.');
    };
    $.quoteString = function (str) {
	if (str.match(escape)) {
	    return '"' + str.replace(escape, 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 '"' + str + '"';
    };
}(jQuery));