Multiple Page Form

hey, I am sure this is a dumb question but, I cannot seem to find out what i am doing wrong. I have a three page form, it basically takes a users input, displays it on the next page to make sure the users info is correct (i store the variables on this page in a form in hidden input tags), when the user clicks subscribe on this page it is supposed to go on to the third page which is a confirmation page. We instead of doing that it just reloads the page and resets all of the values! My form looks something like this (This is a simplified version): <? if ($action=="") { PAGE ONE TEXT AND FORM <form method=post action=$PHP_SELF> <input type=text name=name> <input type=text name=email> <input type=submit value=Subscribe> </form> } elseif ($action="Send") { PAGE TWO <form method=post action=$PHP_SELF> $name <input type=hidden name=name> $email <input type=hidden name=email> <input type=submit value=Subscribe> <form> } elseif ($action="Send") { Thanks for Subscribing! mail("Args","Args","Args"); } ?> I have looked on php.net but i cannot seem to find docs on how to do this! Thanks, Jeremy