Cross Domain Linking

Cross Domain Linking
To track traffic across domains, you can use the _setAllowLinker() function to track user clicks between two domains. For details on setting up cross-domain tracking, see Cross-Domain Tracking.
Async Snippet (recommended)
_gaq.push(['_setAccount', 'UA-XXXXX-X']);
_gaq.push(['_setDomainName', 'none']);
_gaq.push(['_setAllowLinker', true]);
_gaq.push(['_trackPageview']);
...
<a href="http://example.com/test.html"
onclick="_gaq.push(['_link', 'http://example.com/test.html']); return false;">click mea>