Website from picture

[Papewaio]

Google is your friend:

http://www.w3schools.com/tags/tag_iframe.asp

[Papewaio]

Then it is a matter of using a table or some other formating.

For instance from that same website and using tables:

<table border="1">
<tr>
<td><iframe
src ="/default.asp">
</iframe>
</td>
<td><iframe
src ="/default.asp">
</iframe>/td>
<td><iframe
src ="/default.asp">
</iframe>/td>
</tr>
</table>

That would be 3 cells across with the same iframe in each.

[Papewaio]

This would get a single Iframe on oneside and two on the other:

<table border="1">
<tr>
<th rowspan="2"><iframe
src ="/default.asp">
</iframe></th>
<td><iframe
src ="/default.asp">
</iframe></td>
</tr>
<tr>
<td><iframe
src ="/default.asp">
</iframe></td>
</tr>
</table>

[Mithrandir]

Thx Pape but with tables you never have the freedom to get the elements exactly where you want, and I get lost when I want to edit something after a while because of all the tags.

But I managed, CSS isn;t that hard after all.