nascondere una tabella se è vuota

[checkmates]

<script type="text/javascript">
$(function(){
$('button.hide').click(function(){
$('tr').each(function(){
$('td:empty').remove();
})
});
});
</script>

<table>
<thead>
<tr>
<th>
1
</th>
<th>
2
</th>
<th>
3
</th>
</tr>
</thead>
<tr>
<td class="test">test1</td>
<td class="test">test2</td>
<td class="test">test3</td>
</tr>
<tr>
<td class="test"></td>
<td class="test"></td>
<td class="test"></td>
</tr>
</table>
<button class="hide">Nascondi Tabella</button>