> >So i assume that the IE and the FF processors don't support the
> >exslt:node-set()
> >
>
> Moz does not. I think there is an MSXML implementation though (IE).

You can get avoid using the node-set() extension in cases like this by
using:

<xsl:for-each select="document('')/xsl:stylesheet/xsl:variable/dia">
  ...
</xsl:for-each>

An emtpy string for the document() function returns the stylesheet
itself, which you can then treat like a source document and access your
variable using Xpath.  Slower, but portable.

cheers
andrew