jQuery Cookie设置用于保存最后一个会话数据

Question

我有一个简单的降临日历，用户在特定日期打开门。我已经设置了一个jQuery cookie，但是我想让它在返回时记住用户上次会话，所以当他们返回时他们打开的门仍然打开 - 我已经设置了cookie但它没有保存数据，任何帮助不胜感激，谢谢！

链接：http://p3.katecooperuk.com

开门 - 选择随机图像

$('.doors').click(function () {

    if (today.getMonth() !== 11) {
        return;
    }

    if ($(this).attr('id') <= 'dec' + (day + 10)) { // make it 11th Dec for testing

        // Select Random Image
        var doorImage = getRandomImage(calendarImg); 

        // Change background image of door that was clicked
        $(this).css('background-image', doorImage);

        return;  
    }

    // Show image telling user to come back
    $(this).css('background-image', 'url(/images/come_back.png)');

});

jQuery Cookie设置

// Create Cookie - Expires in 40 days
$.cookie('door_cookie', '1', { expires: 30, path: '/' });

// Read Cookie
$.cookie('door_cookie'); // => "the_value"
$.cookie('not_existing'); // => undefined

$.cookie(); // => { "the_cookie": "the_value", "...remaining": "cookies" }

// Returns true when cookie was found, false when no cookie was found...
//$.removeCookie('the_cookie', { path: '/' });

$.cookie.raw = true;

$.cookie.json = true;