commended to use <a href="#getMaxAge()"><code>Max-Age</code></a> to control cookie expiration, however some browsers
 do not understand <code>Max-Age</code>, in which case setting <code>Expires</code> parameter may be necessary.
 </p></div>
<dl class="notes">
<dt>Returns:</dt>
<dd>cookie expiry date or <code>null</code> if no expiry date was set.</dd>
<dt>Since:</dt>
<dd>2.0</dd>
<dt>See Also:</dt>
<dd>
<ul class="see-list">
<li><a href="#getMaxAge()"><code>getMaxAge()</code></a></li>
</ul>
</dd>
</dl>
</se