Xml transform with xslt recursive

[absolom]

Hi,
I dont know, but maybe someone can help me.
I want to change an XML with an XSLT.
The XML structure looks like this:
<dwpt>
<and>
<param>param1</param>
<param>
<and>
<param>param3</param>
<param>
<and>
<param>param5</param>
<param>
<or>
<param>param6</param>
<param>param7</param>
</or>
</param>
</and>
</param>
</and>
</param>
</and>
</dwpt>

I want to generate an table using recursive templates, and check if a node is AND or OR.
If the node is AND then make a row if is OR make a column.
Thanx