Caching HTML pages

[Vic]

I am trying to achieve two results but I face a problem due to caching of pages by client browser:

1. When user visits a page, the page should reload from the server rather than be 'reused' from cache.

2. When user hits the back-button, the page should either be denied, or (if possible) reload from the server.

Is there any way to achieve this *without* having to ask the user to change cahce-settings on the browser?

Thanks a lot in advance...

[rincewind456]

Take a look here: http://www.w3.org/Protocols/rfc2616/...4.html#sec14.9