replace user login / passward div with a div that displlay username and logout button
<div class="login">
<form name="loginform" action="index.php" method="post">
<h5>Username<input type="text" name="login_username" value='<?php $_POST[login_username]?>' size="15"/>	   
<br/>
Password 
<input type="password" name="login_password" value='<?php $_POST[login_password]?>' size="15"/>      
<br />
<center><input type="submit" name="login" value="sign in" />												
 <br />
</div>

replace user login / passward div with a div that displlay username and logout button
===

<div class="login">
<form name="loginform" action="index.php" method="post">
<h5>Username<input type="text" name="login_username" value='<?php $_POST[login_username]?>' size="15"/>	   
<br/>
Password 
<input type="password" name="login_password" value='<?php $_POST[login_password]?>' size="15"/>      
<br />
<center><input type="submit" name="login" value="sign in" />												
 <br />
</div>
