Fix code login/logout redirect

I put a code on my wordpress to login/register but i want he redirect to the same page after login or logout:

<!-- top-login --><div id="header-login"><?php
global $user_ID;
if(!$user_ID ) :?>
Welcome, Guest
<?php else :?>
Welcome Back, <?php
global $current_user;
if ( isset($current_user) ) {
    echo $current_user->user_login;
}
?>
<?php endif;?>&nbsp;:&nbsp;<?php if (!(current_user_can('level_0'))){ ?>

		<?php wp_register('',' | '); ?><?php wp_loginout(); ?>

<?php } else { ?>

		<a href="<?php echo get_option('home'); ?>/wp-admin/"><?php global $user_login;

		get_currentuserinfo();

		echo $user_login;

		?></a> / <?php wp_loginout(); ?>

<?php }?></div><!-- /top-login -->