Ok, for example. When I visit transportation.actionforms.ca and turn off my cookies I will find links like this (notice the zenid):
PHP Code:
http://transportation.actionforms.ca/cart/index.php?main_page=index&cPath=183&zenid=12da6f0bc81eed0b419e4daa853bcf39
If you were to login to any of your subdomains and then send the zenid variable to any other of your subdomains using a link with the zenid then it would keep you logged in.
so for example if I were logged in with the above zenid then doing this would keep me loggged in and take me to the humanresources subdomain:
PHP Code:
http://humanresources.actionforms.ca/cart/index.php?main_page=index&zenid=12da6f0bc81eed0b419e4daa853bcf39
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