php script

<div id="wrapper">
    <div id="title">Change Character Race</div>
    <form action="functions/race.php" method="POST">
        Select a character<br>
        <select name="selectacc">
        <option value="" disabled selected>Select Account</option>
<?php
$conn = new mysqli($host, $dbuser, $dbpass, $authdb);
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
}

$sql = "SELECT id, username FROM account";

$result = $conn->query($sql);

if ($result->num_rows > 0) {
    while($row = $result->fetch_assoc()) {
        echo "<option value='" . $row["id"]. "'>" . $row['username'] . "</option>";
    }
} else {
    echo "<option value='' disabled>No characters avalible</option>";
}
$conn->close();
?>
        </select><br>
        <select name="selectchar">
            <option value="">Select Char</option>
            <!-- Här behövs en jQuery som ska selecta name från characters där account id = resultat från <select name="selectacc"> -->
        </select>
        <select name="race">
            <option value="1">Human</option>
            <option value="2">Orc</option>
            <option value="3">Dwarf</option>
            <option value="4">Night Elf</option>
            <option value="5">Undead</option>
            <option value="6">Tauren</option>
            <option value="7">Gnome</option>
            <option value="8">Troll</option>
            <option value="10">Blood Elf</option>
            <option value="11">Draenei</option>
        </select>
        <br>
        <input type="submit" value="Change Race">
    </form>
</div>