Do I need to use the google analytics _linkByPost() method in this case?

Question

I have a product website on the domain:

http://www.example.com

and I have my secure shopping cart on

https://secure.example.com/checkout

I have used the pageTracker._setDomainName(".example.com") method on both sites to set the main domain the same on both sides.

Using firecookie I can see that the cookies are all set to .example.com.

Question is, do I still need to use _linkByPost() on my buy button forms, in order to append the cookie values in the form action, or will sharing the cookies make this unecessary. Reading the google documentation seems to give conflicting information.

Thanks.

Answer 1

See my comment above.