<table>
<tr bgcolor=white onmouseover='this.style.background = "red"' onmouseout='this.style.background = "white"'>
<td>sloupec 1</td>
<td>sloupec 2</td>
<td>sloupec 3</td>
</tr>
<tr bgcolor=white onmouseover='this.style.background = "red"' onmouseout='this.style.background = "white"'>
<td>sloupec 1</td>
<td>sloupec 2</td>
<td>sloupec 3</td>
</tr>
<tr bgcolor=white onmouseover='this.style.background = "red"' onmouseout='this.style.background = "white"'>
<td>sloupec 1</td>
<td>sloupec 2</td>
<td>sloupec 3</td>
</tr>
</table>