Can I have more actions in a form?

As I said in the title I need more than 1 action in a form... The form is for a log in script and it's like this:

<form method="post" action="action.php" name="loginform" id="loginform">
 <br><br>
       Username:<br> <input type="text" name="username" id="username" /><br><br>
       Password:<br><input type="password" name="password" id="password" /><br /><br>
        <input type="submit" name="login" id="login" value="Login"  class="page"/>

        <br>
        <br>
        <a href="register.php" class="page">Sign up</a>

    </form>

The action.php page is like this:

<?php
  include('index.php');
  include('insert.php');
  include('contact.php');
  include('about.php');
?>

it seems to work the way I want it mostly but after I hit the log in button it redirects me to action.php page which includes all the pages above... I need this action.php page because if I log in I want to be logged in on all pages, not just one of them. Can I have it redirect to another page or something?