how does sessions work ?

[Mickie D]

i was wondering about sessions and wondered if anyone was experianced with using this feature and maybe can help a little ?

Say i had a page that had a form and the form sent infomation to another page (say a small popup - not adverts but info) and i would only want that page to display the info if the page i made sent the request ?

hope that sounds right it was a little difficult to explain and i think sessions can do this ?

for example if someone else sent the request i would want it to display the you do not have permission template ?

thanks for any advice