title: Google Analytics Cross Domain Tracking and _setDomainName()
body: <p>I'm trying to set up cross domain tracking between two totally different Domains (not sub-domains).  Looking through different pages of Google's documentation seem to give me different suggestions for what to put in the <code>_setDomainName</code> method.  </p>
  
  <p>I can't figure out when I'm supposed to use which of these three:</p>
  
  <pre><code>_gaq.push(['_setDomainName', 'mysite.com']);
  _gaq.push(['_setDomainName', '.mysite.com']);
  _gaq.push(['_setDomainName', 'none']);
  </code></pre>
  
  <p>Can anyone out there give me some guidance or an explanation?</p>