static int setCookie_defaultExpirationDays = 365;

static void setCookie(S name, S value) {
  setCookie(name, value, setCookie_defaultExpirationDays);
}

static void setCookie(S name, S value, int cookieDays) {
  // hopefully this refreshes the expiration?
  call(getCookieHandler(), "set", name, urlencode(value), cookieDays); 
}