title: It's possible to share a cookie between 'some' subdomains?
body: <p>I've been reading some posts about web performance, one of the points is to<br>
  serve static content from a cookie-free domain, my question is:</p>
  
  <p>Can I share cookies between, let's say example.com and www.example.com, while excluding static1.example.com, static2.example.com, etc?</p>
  
  <p>Or do I need to set a different top level domain?</p>
  
  <p>I know (or I think) that I could set the domain of the cookie to '.example.com', but<br>
  correct me if I'm wrong this shares the cookies across <em>all</em> sub-domains.</p>