<p class="instructions">Click anywhere in this pane, then try tabbing through the elements.</p>

<form>
    <label>First in tab order: <input type="text"></label>
    <div tabindex="0">Tabbable due to tabindex.</div>
    <div>Not tabbable: no tabindex.</div>
    <label>Third in tab order: <input type="text"></label>
</form>

Output