JavaScript Cookie Manager

var logger = function () {
    var loggingConsole = document.getElementById('console');
    return {
        log: function (msg, isImportant) {
            var span = document.createElement('span');

            if (isImportant) {
                span.innerHTML = msg + '<br/>';
                span.className += 'importantMessage';
            }
            else {
                span.innerHTML = msg;
            }

            loggingConsole.appendChild(span);
            loggingConsole.scrollTop = loggingConsole.scrollHeight;
        },
        clear: function () {
            loggingConsole.innerHTML = '';
        }
    };
};

function registerEvent(ctrl, event, handler, propagate) {
    if (ctrl.addEventListener) {
        ctrl.addEventListener(event, handler, propagate);
    } else {
        ctrl.attachEvent('on' + event, handler);
    }
}

function saveCookiesEventHandler(e) {
    var domain = document.getElementById('txtCookieDomain').value;
    var cookieManager = new Cookies(domain, '', '', false);
    var cookieName = document.getElementById('txtCookieName').value;
    var cookieValue = document.getElementById('txtCookieValue').value;
    cookieManager.write(cookieName, cookieValue);
}

function clearCookiesEventHandler(e) {
    var domain = document.getElementById('txtCookieDomain').value;
    var cookieManager = new Cookies(domain, '', '', false);
    var cookies = cookieManager.keys();

    for (var key = 0; key < cookies.length; key++) {
        var cookie = cookies[key];
        logger().log('Located cookie \'' + cookie.Cookie + '\'. Attempting to delete...');

        cookieManager.remove(cookie.Cookie);     

        if (cookieManager.read(cookie.Cookie)) {
            logger().log('Failed to delete cookie \'' + cookie.Cookie + '\'. Please check your domain and path and try again.');
        } else {
            logger().log('Cookie \'' + cookie.Cookie + '\' deleted successfully!');
        }

        
    }
}

function saveSubCookiesEventHandler(e) {
    var domain = document.getElementById('txtCookieDomain').value;
    var cookieManager = new Cookies(domain, '', '', false);
    var cookieName = document.getElementById('txtCookieName').value;
    var subCookieKey = document.getElementById('txtSubCookieKey').value;
    var cookieValue = document.getElementById('txtCookieValue').value;
    cookieManager.writeKey(cookieName, subCookieKey, cookieValue);
}

function readCookiesEventHandler(e) {
    var domain = document.getElementById('txtCookieDomain').value;
    var cookieName = document.getElementById('txtCookieName').value;
    var cookieManager = new Cookies(domain, '', '', false);
    var cookieValue = cookieManager.read(cookieName);

    if (cookieValue) {
        logger().log(cookieValue);
    }
    else {
        logger().log('Cookie \'' + cookieName + '\' not found in domain \'' + cookieManager.domain() + '\'.');
    }

}

function readSubCookiesEventHandler(e) {
    var domain = document.getElementById('txtCookieDomain').value;
    var cookieManager = new Cookies(domain, '', '', false);
    var cookieName = document.getElementById('txtCookieName').value;
    var subCookieKey = document.getElementById('txtSubCookieKey').value;
    var cookieValue = cookieManager.readKey(cookieName, subCookieKey);
    if (cookieValue) {
        logger().log(cookieValue);
    }
    else {
        logger().log('Subkey \'' + subCookieKey + '\' of cookie \'' + cookieName + '\' not found in domain \'' + cookieManager.domain() + '\'.');
    }

}

function showAllCookiesEventHandler(e) {
    var domain = document.getElementById('txtCookieDomain').value;
    var cookieManager = new Cookies(domain, '', '', false);
    var allKeys = cookieManager.keys();

    if (allKeys && allKeys.length > 0) {
        for (var i = 0; i < allKeys.length; i++) {
            var cookie = allKeys[i];
            logger().log(cookie.Cookie + ': ' + cookieManager.read(cookie.Cookie));
            if (cookie.Keys && cookie.Keys.length > 0) {
                for (var h = 0; h < cookie.Keys.length; h++) {
                    var key = cookie.Keys[h];

                    logger().log(key + ': ' + cookieManager.readKey(cookie.Cookie, key), true);
                }
            }
        }
    }
    else {
        logger().log('No cookies found.');
    }
}

function clearConsoleEventHandler(e) {
    logger().clear();
}

function windowLoadedEventHandler(e) {
    var btnReadCookies = document.getElementById('btnReadCookies');
    var btnClearConsole = document.getElementById('btnClearConsole');
    var btnSaveCookies = document.getElementById('btnSaveCookies');
    var btnClearCookies = document.getElementById('btnClearCookies');
    var btnSaveSubCookies = document.getElementById('btnSaveSubCookies');
    var btnReadSubCookies = document.getElementById('btnReadSubCookies');
    var btnShowAllCookies = document.getElementById('btnShowAllCookies');

    registerEvent(btnReadCookies, 'click', readCookiesEventHandler, false);
    registerEvent(btnReadSubCookies, 'click', readSubCookiesEventHandler, false);
    registerEvent(btnClearConsole, 'click', clearConsoleEventHandler, false);
    registerEvent(btnSaveCookies, 'click', saveCookiesEventHandler, false);
    registerEvent(btnClearCookies, 'click', clearCookiesEventHandler, false);
    registerEvent(btnSaveSubCookies, 'click', saveSubCookiesEventHandler, false);
    registerEvent(btnShowAllCookies, 'click', showAllCookiesEventHandler, false);
}

registerEvent(window, 'load', windowLoadedEventHandler, false);