I want to do an HTML table like the following:

I wrote the following code to generate it:
<table border>
<tr>
<td colspan="2">A</td>
<td>A</td>
</tr>
<tr>
<td>A</td>
<td colspan="2">A</td>
</tr>
</table>
But the problem is that it doesn't appear like I want in Firefox:

And it's kinda similar to what I want in IE but it's not the same:

Is this a problem in browsers? And is there anyway to solve it?

I wrote the following code to generate it:
<table border>
<tr>
<td colspan="2">A</td>
<td>A</td>
</tr>
<tr>
<td>A</td>
<td colspan="2">A</td>
</tr>
</table>
But the problem is that it doesn't appear like I want in Firefox:

And it's kinda similar to what I want in IE but it's not the same:

Is this a problem in browsers? And is there anyway to solve it?
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