sessions: what to do when browser won't accept cookies?

I'm finding myself in a strange situation. I am trying to build a a web site that will use sessions and work even if a user decides not to accept cookies. So far the site design is working fine by using the trans-sid functionality of PHP. But I have this on case where things break down. 1- user comes to the top page of my site 2- I try and start a session. user refuses to accept cookies 3- user click on links to visit my site, session works before SID is passed along in the URL 4 user clicks back button all the way back to my top page 5 session is lost because the SID is not in the URL of the top page ... How can I get around the problem of not having the SID in the URL of the first page to my site the user comes to? It kind of a chicken-or-the-egg problem ... Thanks for any and all suggestions! Jc