I need to have a dynamic link in my header and I'm a bit confused. Basically, people can arrive at my store from two locations. I need a link at the top to take them back to the correct 'Home' location (where they came from). This I can do using sessions I imagine. But I can't seem to get the link to stay across all pages of the store, only the home page. Once the user logs in/out or goes to a product page, the link is gone. Maybe the session is destroyed somewhere??
Any help would be appreciated.