title: Keeping session information between a primary domain and a subdomain
body: <p>I was wondering if it is possible to retain session information between a primary domain and a subdomain. For example, I login on <a href="http://www.mydomain.com/" rel="nofollow">http://www.mydomain.com/</a> but I want to use the same session on <a href="http://something.mydomain.com/" rel="nofollow">http://something.mydomain.com/</a>. </p>