Cookies

function setCookie(name, value, days) {
    document.cookie = encodeURIComponent(name) + '=' + encodeURIComponent(value) + '; Expires=' + new Date(new Date().getTime() + days * 24 * 60 * 60 * 1000).toUTCString();
};

function deleteCookie(name) {
    setCookie(name, '', -1);
};