I may not be understanding the question but I
can't seem to reproduce the scenario. If I log in to
Yahoo mail and from the mail main page, click the back
button to the login page and then the forward  button,
I'm at the mail home page again.<br><br>FWIW I have
my browser  set to refresh every visit to the page.
What am I missing? I know that JavaScript has the
history object that has back() and forward() methods so
maybe there's something useful there.