how to track across (sub) domains
If the same script is used across domains, visitors that move between the two domains will be seen as referred.
It is possible to implement a fix for this and to use the same script to track across your sub-domains.
Tracking across (sub) domains
To accomplish this in two steps;
a. register (for example) mysite.com as the site to be tracked without the www.
b. alter the beginning of the script you receive to read as follows when placed in your source code:
note the appended dot / "." in front of the mysite.com
The alternative to the above is to register the sub-domains separately.