can you explain your problem better please?
Make sure when ever you post a problem, you give..

1. Snip of your XML
2. The output You want to acheive
3. The Code you have done.

From: "Giancarlo Rossi" <giancarlo_rossi@xxxxxxxxxx>
Reply-To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
To: <xsl-list@xxxxxxxxxxxxxxxxxxxxxx>
Subject:  Filter by a parameter
Date: Tue, 24 Oct 2006 13:57:44 +0200

I'm using xslt 1.0

<xsl:param name="supplier_param" />

<xsl:variable name="test">
<xsl:choose>
<xsl:when test="$supplier_param">
<xsl:value-of select="$supplier_param"/>
</xsl:when>
<xsl:otherwise>
*
</xsl:otherwise>
</xsl:choose>
</xsl:variable>

<xsl:for-each select="/Root/Mynode[Complete='true' and
Supplier=$test]/price">

</xsl:for-each>

But it doesnt works...