function getCookie(name) {
    var start = document.cookie.indexOf(name + "="),
        len   = start + name.length + 1;

    if ((!start) && (name !== document.cookie.substring(0, name.length))) {
        return null;
    }

    if (start === -1) { 
        return null;
    }

    var end = document.cookie.indexOf(';', len);

    if (end === -1) {
        end = document.cookie.length;
    }

    return unescape(document.cookie.substring(len, end));
}

function setCookie(name, value, expires, path, domain, secure) {
    var today = new Date();
    today.setTime(today.getTime());

    if (expires) {
        expires = expires * 1000 * 60 * 60 * 24;
    }

    var expires_date = new Date(today.getTime() + (expires));

    document.cookie = name + '=' + escape(value) +
        ((expires) ? ';expires=' + expires_date.toGMTString() : '') + //expires.toGMTString()
        ((path) ? ';path=' + path : '') +
        ((domain) ? ';domain=' + domain : '') +
        ((secure) ? ';secure' : '');
}

function deleteCookie(name, path, domain) {
    if (getCookie(name)) {
        document.cookie = name + '=' +
            ((path) ? ';path=' + path : '') +
            ((domain) ? ';domain=' + domain : '') +
            ';expires=Thu, 01-Jan-1970 00:00:01 GMT';
    }
}