Do web browsers store information in forms while processing is happening?

Im creating an application and i want to know whether or not the browser will store the information in the fields if an error occurs so i can just send the browser back or should i store everythin开发者_JAVA百科g in a session and then place things back as they were with the session? I am developing my application in JSP and Servlets.

Thanks in Advance

Dean

Sometimes they do, but generally they don't -- you shouldn't rely on it.