note 59604 added to ref.session

I wrote a session login script that sets a PHPSESSID cookie and uses a header to redirect to say, main.html. Main.html consists of having four frames, each holding a different page. I want these pages to not be viewed unless you have a valid session on your hands. How can this be done...? ---- Manual Page -- http://www.php.net/manual/en/ref.session.php Edit -- http://master.php.net/manage/user-notes.php?action=edit+59604 Delete: added to the manual -- http://master.php.net/manage/user-notes.php?action=delete+59604&report=yes&reason=added+to+the+manual Delete: bad code -- http://master.php.net/manage/user-notes.php?action=delete+59604&report=yes&reason=bad+code Delete: spam -- http://master.php.net/manage/user-notes.php?action=delete+59604&report=yes&reason=spam Delete: useless -- http://master.php.net/manage/user-notes.php?action=delete+59604&report=yes&reason=useless Delete: non-english -- http://master.php.net/manage/user-notes.php?action=delete+59604&report=yes&reason=non-english Delete: already in docs -- http://master.php.net/manage/user-notes.php?action=delete+59604&report=yes&reason=already+in+docs Delete: other reasons -- http://master.php.net/manage/user-notes.php?action=delete+59604&report=yes Reject -- http://master.php.net/manage/user-notes.php?action=reject+59604&report=yes Search -- http://master.php.net/manage/user-notes.php