Change Row Height in Table

I am trying to change the row height in html table but with no success.

This is what i have been doing

<table>
   <tr style="height:20px">
      <td> Hello World!!</td>
   </tr>
</table>

HTML:

This works fine in IE but not in firefox. I can't find a proper fix to make this work under firefox. I need to modify the row height... so please give some hint to get this working!!

 

alter the height value with the td, not tr

change to this

<table>
<tr>
<td height="50"> Hello World!!</td>
</tr>
</table>

 

That works in IE even though it shouldnt because there is no height attribute for table row. You can give height and width attributes only to <TD>.

 

giving float left does the trick, <tr style=" float:left; height:39px">