I've read all about sessions, but I don't see how it would fix this problem. My site has a long form to fill out. Sometimes the visitor may need to go to another part of the sight to look something up. If they fill in half of their form, the only way they keep their entries is to hit the back button. How can it be made to work so that the user will keep all the fields as entered, even though the submit button hasn't been clicked?