making php response to remain visible when page refresh
<p>It is all working fine in my login-script. I get the right responses in my div (id=login_reply) and the session starts. But whenever I refresh the page, the login_reply is gone. How am I able to keep the login_reply? Thank you!</p>

<p>Here is the php:   </p>

<pre><code>if (isset($_POST['username'], $_POST['password']))
{
    $username = mysql_real_escape_string($_POST['username']);
    $password = mysql_real_escape_string(md5($_POST['password']));

    $check = mysql_query("SELECT * FROM `userbase` WHERE `user_name` = '$username'");
    if (mysql_num_rows($check) &gt; 0)
    {
        while ($row = mysql_fetch_assoc($check))
        {
            $user_id = $row['user_id'];
            $user_name = $row['user_name'];
            $user_email = $row['user_email'];
            $user_password = $row['user_password'];

            if ($password == $user_password)
            {
                $_SESSION['user_id'] = $user_id;
                if (isset($_SESSION['user_id']) &amp;&amp; $_SESSION['user_id'] != '')  
                    echo "Welcome back '$user_name'!";
                else
                {
                    echo 'no';
                }

            }
            else
                echo 'no';
        }
    }
    else
        echo 'no';  
}
</code></pre>

<p>Here is the jQuery</p>

<pre><code>$(document).ready(function()
{

$('#login').click(function()
{
    var username = $('#username').val();
    var password = $('#password').val();

    $.ajax(
    {
        type: 'POST',
        url: 'php/login.php',
        data: 'username=' +username + '&amp;password=' + password,
        success: function(data)
        {
            if (data != 'no')
            {
                $('#logform').slideUp(function()
                {
                    $('#login_reply').html(data).css('color', 'white');
                });
            }
            else                    
                $('#login_reply').html('Invalid username or password').css('color', 'red');
        }
    });
    return false;
});
});
</code></pre>
