Set height of the row when column is hiden

Hi, need help please!

Hiding column but can't set the height of row

I'm hiding the columns within the row, but can't seem to hide the row nor set the height of the row!

<tr style="visibility: hidden; height: 0px;">
<td colspan="4" style="visibility: hidden; height: 0px;">
"object"
</td>
</tr>

How can I set the height of the row when column is hiden.

Regards