<div class="form group col-md-12" style="margin-bottom: 20px;">
    <label for="hl_select">New hardlock key *</label>
    <select class="form-control pointer" name="hl_select" id="hl_select">
        <?php if (empty($empty_hardlocks)) : ?>
            <option value="none">Out of stock</option>
        <?php else : ?>
            <?php foreach ($empty_hardlocks as $hl) : ?>
                <option value="<?= $hl->hlNum ?>"><?= $hl->hlNum ?></option>
            <?php endforeach; ?>
        <?php endif; ?>
    </select>
</div>

<div class="form-group col-md-12">
    <label for="old_hl_number">Old Serial Number (16 digits) *</label>
    <input type="text" name="old_hl_number" class="form-control" id="old_hl_number" required>
    <div id="old_hl_number-error"></div>
    <div id="wrong_hl_num-error"></div>
</div>