Setparameter and node

( Sorry for my rusted english :-( )
Hi,
I have a problem with a setParameter.
I would use a "node" type , as a selectNodes of IE, but my xslt refuse
tu use this param
(No error if I not try to use it)

An example of xml

<?xml version="1.0" encoding="ISO-8859-1"?>
<catalogue type="biliothèque">
	<domaine type="Roman"  >
		<genre type="science-fiction"  >
			<element  >
				<nom>Les cavernes d'acier</nom>
				<auteur>Isaac Asimov</auteur>
				<nombre>3</nombre>
			</element>
			<element  >
				<nom>Dune</nom>
				<auteur>Frank Herbert</auteur>
				<nombre>6</nombre>
			</element>
		</genre>
	</domaine>
</catalogue>

My xslt


<?xml version="1.0" encoding="ISO-8859-1"?>
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
	<xsl:output method="xml" version="1.0" encoding="ISO-8859-1"
indent="yes"/>
	<xsl:param name="selection"/>
	<xsl:template match="/">
	<table border="2">
		<tbody>
			<tr>
				<th class="hand" onclick="pTrier('nom',objDoc)">Nom</th><th
class="hand" onclick="pTrier('auteur',objDoc)">auteur</th><th
class="hand" onclick="pTrier('nombre',objDoc)">nombre</th>
			</tr>
		<xsl:apply-templates
select="//*[generate-id(.)=generate-id($selection)]/descendant-or-self::element">
		</xsl:apply-templates>
		</tbody>
	</table>

	</xsl:template>
		<xsl:template match="element">
		<tr>
				<td><xsl:value-of select="nom"></xsl:value-of></td>
				<td><xsl:value-of select="auteur"></xsl:value-of></td>
				<td><xsl:value-of select="nombre"></xsl:value-of></td>
		</tr>
		<br/>
	</xsl:template>
</xsl:stylesheet>

and javascript


xcheminTri="/*[1]"
DIV.innerHTML=
fForm(objXml,document.evaluate(xcheminTri,objXml,null,XPathResult.UNORDERED_NODE_ITERATOR_TYPE,null))

	function fForm(objXml,param1)
{

			var res
			var tmpBox = document.createElement("div");
			<!--I try also param1.iterateNext() -->

		objFormProc.setParameter(null,"selection",param1)

		tmpBox.appendChild(objFormProc.transformToFragment(objXml,document));
		res=tmpBox.innerHTML
		return res;
}


May be it's impossible to use object with Mozilla ?