form autocomplete

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
    <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1/0;">
    <title>update</title>
    <link rel="stylesheet" type="text/css" href="style.css" />
    <script type="text/javascript" src="js/jquery-1.2.6.min.js"></script>
    <script type="text/javascript" src="js/jquery.validate.js"></script>
</head>
<body>
<div><h1>update existing <button class="learn-more" type="submit" onclick="window.location.href='/vaadbait/ContactForm/index.html';">Home page</button></h1></div>
    <div id="page-wrap">
        <form method="post" autocomplete="off" action="updatetenant.php" id="commentForm">
            <fieldset>
            <div id="formRight">
                <label for="Name">number:</label>
                <?php
                $servername = "localhost";
                $username = "root";
                $password = "";
                $dbname = "vaadbait";
                $pdo = new PDO("mysql:host=$servername;dbname=$dbname", $username, $password);
                $sql = "SELECT appartnmb,firstname,lastname FROM contacts";
                $stmt = $pdo->prepare($sql);
                $stmt->execute();
                $results = $stmt->fetchAll(PDO::FETCH_ASSOC);
                if ($stmt->rowCount() > 0) { ?>


                <!-- dropdownlist -->
                  <select class="input-bg" name="nbrselect">
                  <option value="" disabled selected>choice from list</option>
                      <?php foreach ($results as $row) { $appartnmbr = $row['appartnmb']; ?>
                            <option value="<?php $row['appartnmb']?> <?php echo $row['appartnmb']; ?>"><?php echo $row['appartnmb']; ?>&nbsp;<?php echo $row['firstname']; ?>&nbsp;<?php echo $row['lastname']; ?></option>
                            <?php } ?>
                  </select>
                  <?php } ?>
                  <!-- dropdownlist -->

                <label for="Name">Lastname</label>
                <?php
                $sql = "SELECT lastname, firstname FROM contacts WHERE appartnmb='$appartnmbr'";
                $stmt = $pdo->prepare($sql);
                $stmt->execute();
                $results = $stmt->fetchAll(PDO::FETCH_ASSOC);
                if ($stmt->rowCount() > 0) {
                foreach ($results as $row) { ?>
                <div class="input-bg">
                    <input type="text" name="lastname" id="lastname" placeholder="Lastname" class="required" required="required" />
                    <input type="text" name="lastname" value="<?php echo $row['lastname']?>" required>
                </div>
                <?php } ?>
                <?php } ?>
                <br>
                <input type="image" src="images/send-button.jpg" name="submit" value="Submit" class="submit-button" />
            </div>

            <div id="formLeft">
                <label for="Name">FirstName:</label>
                <div class="input-bg">
                    <input type="text" name="firstname" id="firstname" placeholder="FirstName" class="required" required="required" />
                </div>

                <label for="Email">Email:</label>
                <div class="input-bg">
                    <input type="text" name="mail" id="mail" placeholder="Email" <!-- class="required email -->" />
                </div>
            </div>

            <div class="clear"></div>
            </fieldset>
        </form>
    </div>
    <script src="http://www.google-analytics.com/urchin.js" type="text/javascript">
    </script>
    <script type="text/javascript">
    _uacct = "UA-68528-29";
    urchinTracker();
    </script>
</body>
</html>