conditional html

How can I insert conditional html?  I want to iterate over a set of nodes
("rows" in the example below) and format a table row for every sixth item.

I tried the following, but of course its an unbalanced xml file:


<xsl:for-each select="rows">
  <xsl:if test="(position() mod 6) = 1">
    <tr>
  </xsl:if>

  <xsl:value-of select="someNode"/>

  <xsl:if test="(position() mod 6) = 0">
    </tr>
  </xsl:if>
</xsl:for-each>

 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list