ASP.NET MVC Flash Messages (Razor)

_Flash.cshtml

<div id="flash-messages" class="alert-message" style="display:none;">    
    <a class="close" href="#">&times;</a>
    <p></p>
</div>

<script type="text/javascript">
    $(function () {
        $("#flash-messages").flashMessage();
    });
</script>

_Layout.cshtml

@Html.Partial("_Flash")

ExampleController.cs

// Usage within MVC Controller
[HttpPost]
public ActionResult Create()
{
  return RedirectToAction("Index").Success("Message shown to user after redirect");
}

FlashMessageExtensions.cs

internal static class FlashMessageExtensions
{
    public static ActionResult Error(this ActionResult result, string message)
    {
        CreateCookieWithFlashMessage(Notification.Error, message);
        return result;
    }

    public static ActionResult Warning(this ActionResult result, string message)
    {
        CreateCookieWithFlashMessage(Notification.Warning, message);
        return result;
    }

    public static ActionResult Success(this ActionResult result, string message)
    {
        CreateCookieWithFlashMessage(Notification.Success, message);
        return result;
    }

    public static ActionResult Information(this ActionResult result, string message)
    {
        CreateCookieWithFlashMessage(Notification.Info, message);
        return result;
    }

    private static void CreateCookieWithFlashMessage(Notification notification, string message)
    {
        HttpContext.Current.Response.Cookies.Add(new HttpCookie(string.Format("Flash.{0}", notification), message) { Path = "/" });
    }

    private enum Notification
    {
        Error,
        Warning,
        Success,
        Info
    }
}

jquery.cookie.js

/*jslint browser: true */ /*global jQuery: true */

/**
 * jQuery Cookie plugin
 *
 * Copyright (c) 2010 Klaus Hartl (stilbuero.de)
 * Dual licensed under the MIT and GPL licenses:
 * http://www.opensource.org/licenses/mit-license.php
 * http://www.gnu.org/licenses/gpl.html
 *
 */

// TODO JsDoc

/**
 * Create a cookie with the given key and value and other optional parameters.
 *
 * @example $.cookie('the_cookie', 'the_value');
 * @desc Set the value of a cookie.
 * @example $.cookie('the_cookie', 'the_value', { expires: 7, path: '/', domain: 'jquery.com', secure: true });
 * @desc Create a cookie with all available options.
 * @example $.cookie('the_cookie', 'the_value');
 * @desc Create a session cookie.
 * @example $.cookie('the_cookie', null);
 * @desc Delete a cookie by passing null as value. Keep in mind that you have to use the same path and domain
 *       used when the cookie was set.
 *
 * @param String key The key of the cookie.
 * @param String value The value of the cookie.
 * @param Object options An object literal containing key/value pairs to provide optional cookie attributes.
 * @option Number|Date expires Either an integer specifying the expiration date from now on in days or a Date object.
 *                             If a negative value is specified (e.g. a date in the past), the cookie will be deleted.
 *                             If set to null or omitted, the cookie will be a session cookie and will not be retained
 *                             when the the browser exits.
 * @option String path The value of the path atribute of the cookie (default: path of page that created the cookie).
 * @option String domain The value of the domain attribute of the cookie (default: domain of page that created the cookie).
 * @option Boolean secure If true, the secure attribute of the cookie will be set and the cookie transmission will
 *                        require a secure protocol (like HTTPS).
 * @type undefined
 *
 * @name $.cookie
 * @cat Plugins/Cookie
 * @author Klaus Hartl/klaus.hartl@stilbuero.de
 */

/**
 * Get the value of a cookie with the given key.
 *
 * @example $.cookie('the_cookie');
 * @desc Get the value of a cookie.
 *
 * @param String key The key of the cookie.
 * @return The value of the cookie.
 * @type String
 *
 * @name $.cookie
 * @cat Plugins/Cookie
 * @author Klaus Hartl/klaus.hartl@stilbuero.de
 */
jQuery.cookie = function (key, value, options) {
    
    // key and at least value given, set cookie...
    if (arguments.length > 1 && String(value) !== "[object Object]") {
        options = jQuery.extend({}, options);

        if (value === null || value === undefined) {
            options.expires = -1;
        }

        if (typeof options.expires === 'number') {
            var days = options.expires, t = options.expires = new Date();
            t.setDate(t.getDate() + days);
        }
        
        value = String(value);
        
        return (document.cookie = [
            encodeURIComponent(key), '=',
            options.raw ? value : encodeURIComponent(value),
            options.expires ? '; expires=' + options.expires.toUTCString() : '', // use expires attribute, max-age is not supported by IE
            options.path ? '; path=' + options.path : '',
            options.domain ? '; domain=' + options.domain : '',
            options.secure ? '; secure' : ''
        ].join(''));
    }

    // key and possibly options given, get cookie...
    options = value || {};
    var result, decode = options.raw ? function (s) { return s; } : decodeURIComponent;
    return (result = new RegExp('(?:^|; )' + encodeURIComponent(key) + '=([^;]*)').exec(document.cookie)) ? decode(result[1]) : null;
};

jQuery.flashMessage.js

$.fn.flashMessage = function (options) {
    var target = this;
    options = $.extend({}, options, { timeout: 3000, alert: 'info' });

    if (!options.message) {
        setFlashMessageFromCookie(options);
    }

    if (options.message) {
        $(target).addClass(options.alert.toString().toLowerCase());

        if (typeof options.message === "string") {
            $('p', target).html("<span>" + options.message + "</span>");
        } else {
            target.empty().append(options.message);
        }
    } else {
        return;
    }

    if (target.children().length === 0) return;

    target.fadeIn().one("click", function () {
        $(this).fadeOut();
    });

    if (options.timeout > 0) {
        setTimeout(function () { target.fadeOut(); }, options.timeout);
    }

    return this;

    // Get the first alert message read from the cookie
    function setFlashMessageFromCookie() {
        $.each(new Array('Success', 'Error', 'Warning', 'Info'), function (i, alert) {
            var cookie = $.cookie("Flash." + alert);

            if (cookie) {
                options.message = cookie;
                options.alert = alert;

                deleteFlashMessageCookie(alert);
                return;
            }
        });
    }

    // Delete the named flash cookie
    function deleteFlashMessageCookie(alert) {
        $.cookie("Flash." + alert, null, { path: '/' });
    }
};

I'm using one of the fixes done to the original code (by thomkaufmann) and wanted to know the license terms if the code snippet can be used in other projects.

Thanks