As <span>
is an inline element, you cannot apply height
to it.
You should change <span>
into <div>
, which is a block element.
<td style="width:200px"><div id="ImgHeader"></div></td>
or apply the CSS selector to <td>
if applicable:
<td id="ImgHeader"> </td>
Last, it's time to change to a modern HTML5 DOCTYPE:
<!DOCTYPE html>
Important: never remove the DOCTYPE.
p.s. if you are worried about old browser support of HTML5 DOCTYPE, read this. In short, old browser supports this DOCTYPE too (except NS6, which I believe nobody is using it)