[JsLoveR]

<table>
	<tbody id="rows_cells">
		<tr>
			<td>1</td>
			<td>2</td>
		</tr>
		
		<tr>
			<td>3</td>
			<td>4</td>
			<td>5</td>
		</tr>
	</tbody>
</table>
<p onclick="display()">Скрыть</p>

function display(){
	var tbody=document.getElementById("rows_cells");
	tbody.style.display=="none" ? tbody.style.display="block" : tbody.style.display="none";
}