[danik.js]

<div id="source">
    <table>
        <tr>
            <td><input type="checkbox"></td>
            <td><input type="checkbox"></td>
            <td><input type="radio"></td>
        </tr>
    </table>
</div>
<button id="button">Клонировать</button>
<div id="target"></div>
<script>
    button.onclick = function(){
        var clone = source.firstElementChild.cloneNode(true);
        target.appendChild(clone);
    }
</script>