<?php if ($_POST["user"]==0) ?>
</li>
<li>
              <a> <span class="l"></span><span class="r"></span><span class="t">
<form name="input" action="page.php" method="get">
Username: <input type="text" name="user"/>
Password: <input type="password" name="password" />
<input type="submit" value="Log In" />

</form>
</span>
</a>
</li>
<li>


<?

$con = mysql_connect("localhost","root","");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }

mysql_select_db("book", $con);


$query = "SELECT * FROM cliente";

$result = mysql_query($query) or die ("Error in query: $query. ".mysql_error());



if (($_POST["password"] = mysql_fetch_row($result)) ?>

Welcome <?php echo $_REQUEST["user"]; ?>!<br />

<?php
session_start();

if (session_start();==1)

<script type="text/javascript">
                    function logout(){
                 session_destroy();
            }
</script>

<a href="#" onclick="logout()">logout</a>


?>