Sharing cookies for dyanmic domain

Hi folks,
i have two websites example.com and a mob version m.example.com so
waht i want is that if a user is logged in example.com then when he
switches to m.example.com he wont have to login again…
Is there any method that anyone can suggest i have tried with some
techniques available on net but they are not working out…
Thanks,
Atin

This forum is not affiliated to the Ruby language, Ruby on Rails framework, nor any Ruby applications discussed here.

| Privacy Policy | Terms of Service | Remote Ruby Jobs