login how?

[jannoy]

to all guru

how can i be able to login in two different website."website1.com and website2.com" Like when i login on my first site (website1.com)then there is a link on says" go to this site" so when i click on that will proceed on website2.com..and automatically login . and be able to go back to website1.com and still login or VICE VERSA

I USE COOKIES and session anyway

[Frederick]

If you use cookies to retain login, then the cookie is domain specific, but if you use seesions, then sessions can be used between sites if you don't open a new window for linking to the other site.