Page Cache

[tshad]

I need to find out how to force a page to always be reloaded from the server
and not from the browser cache - regardless to how the user has his
settings.

I have a page that is loading a captcha picture for the user to enter a
security code. The problem is that if they enter the wrong information, the
page can come from the browser cache, but the picture will still display a
different number. From this point on the user will never be able to enter
the correct number as he will no longer see it.

I tried:
<meta http-equiv="Pragma" content="no-cache">
<meta http-equiv="Expires" content="-1">

But this doesn't seem to work.

I set "Check for newer versions of stored pages" to "Never" and it works as
expected.

But I need to go around this somehow or some people will not be able to log
on.

I had this problem with one person who called and was very upset about not
being able to create a logon. After a while I was able to determine that
this setting was set to "Never". He didn't know it was set that way.

Normally, this is not a problem, but for this page it definately is.

Thanks,

Tom