Hello, everybody. It's me again.

After finally getting my XSLT to work, I have been given another assignment to my... assignment. However, this time, I'm completely stumped even with help from Google and my colleagues.

As a brief summary, my XML file contains a large list of products that you could find on a webshop. I have to be able to list them all when the page loads, and filter them to only show Dutch products by using a button.

I have been able to filter the products to only show Dutch products, but I have no idea how to activate this by using a button. I would really appreciate it if somebody could help me with this problem.

Here is my XSLT:

<xsl:output method="xml" omit-xml-declaration="yes"/>
<xsl:param name="currentPage"/>

<xsl:template match="/">
  <xsl:variable name="MyFeed" select="umbraco.library:GetXmlDocumentByUrl('http://shop.voetbalshirts.com/content/files/exportimport/froogle_7679424322.xml')" />
  <xsl:for-each select="$MyFeed/rss/channel/item">
          <xsl:variable name="productcondition" select="*[local-name()='product_type']" />
          <xsl:if test="contains($productcondition, 'Nederland')">
              <div style="padding: 10px;" align="center">
                  <span style="font-weight:bold"><xsl:value-of select="title"/></span><br />
                  <xsl:variable name="productlink" select="*[local-name()='link']" />
                  <a>
                  <xsl:attribute name="href"><xsl:value-of select="$productlink"/></xsl:attribute>
                  <xsl:attribute name="target">_blank</xsl:attribute>
                  <img>
                      <xsl:variable name="image" select="*[local-name()='image_link']" />
                      <xsl:attribute name="src"><xsl:value-of select="$image"/></xsl:attribute>
                  </img><br />
                  </a>
                  <xsl:value-of select="description" disable-output-escaping="yes"/>
              </div>
          </xsl:if>
  </xsl:for-each>
</xsl:template>
</xsl:stylesheet>

The bold piece of code is supposed to be off when the page loads, and must be activated by pressing the button.