Change button to text link

Hi all!

I have a problem well, its not a problem I just want to change something.
http://www.leodag.nl/blog/ is my site as you can see there is a login script on the frontpage. It works great but I want to change the “Log In” button.

This is the login script:

<li>
	<?php global $user_ID, $user_identity, $user_level ?>
    <?php if ( $user_ID ) : ?>
    <h2>Vlindercontrol</h2>
    <ul>
        <li>Ingelogd als: <strong><?php echo $user_identity ?></strong>.
        <ul>
            <li><a href="<?php bloginfo('url') ?>/wp-admin/">admin panel</a></li>
            <?php if ( $user_level >= 0 ) : ?>
            <li><a href="<?php bloginfo('url') ?>/wp-admin/post-new.php">schrijf een artikel</a></li>
            <?php endif // $user_level >= 1 ?>
            <li><a href="<?php bloginfo('url') ?>/wp-admin/profile.php">persoonlijke opties</a></li>
            <li><?php wp_loginout(); ?></li>
        </ul>
        </li>
    </ul>
    <?php elseif ( get_option('users_can_register') ) : ?>
    <h2>Inloggen</h2>
    <ul>
        <li>
        <form action="<?php bloginfo('url') ?>/wp-login.php" method="post">
            <p>
            gebruikersnaam:<br /><label for="log"><input type="text" name="log" id="log" value="<?php echo wp_specialchars(stripslashes($user_login), 1) ?>" style="width: 100px;" /> </label><br />
            wachtwoord:<br /><label for="pwd"><input type="password" name="pwd" id="pwd" style="width: 100px;" /> </label><br />
            <input type="submit" name="submit" value="Log In" class="class" />
            <label for="rememberme"><input name="rememberme" id="rememberme" type="checkbox" checked="checked" value="forever" /> onthoud mij</label><br />
            </p>
            <input type="hidden" name="redirect_to" value="<?php echo $_SERVER['REQUEST_URI']; ?>"/>
        </form>
        </li>

I hope some1 can help me with it already tried something like login but didnt work at all.

thanks