function setCookie(name, value, expires, path, domain, secure){
    var cookie = encodeURIComponent(name) + '=' + encodeURIComponent(value);
    if(expires) cookie += '; expires=' + expires.toGMTString();
    if(path) cookie += '; path=' + path;
    if(domain) cookie += '; domain=' + domain;
    if(secure) cookie += '; secure=' + secure;
    document.cookie = cookie;
}
function removeCookie(name, path, domain){
    document.cookie = name + '=' +
                      '; path=' + path +
                      '; domain=' + domain +
                      '; max-age=0';
}