HTML table with alternating row colors via XSL

Question

What is the easiest way to alternate row colors in an HTML table (a.ka. striping). Most of my tables are created in XSL templates like the following, with the table, thead, etc.. defined in another template.

<xsl:template match="typ:info">
  <tr>
    <td>
      <xsl:value-of select="typ:dateAccessed" />
    </td>
    <td>
      <xsl:value-of select="typ:loginId" />
    </td>
  </tr>
</xsl:template>

My preference is to use alternating classes on the elements.

Answer 1

<xsl:template match="typ:info">
  <xsl:variable name="css-class">
    <xsl:choose>
      <xsl:when test="position() mod 2 = 0">even</xsl:when>
      <xsl:otherwise>odd</xsl:otherwise>
    </xsl:choose>
  </xsl:variable>
  <tr class="{$css-class}">
    <td>
      <xsl:value-of select="typ:dateAccessed" />
    </td>
    <td>
      <xsl:value-of select="typ:loginId" />
    </td>
  </tr>
</xsl:template>

Answer 2

Use an XSL:When and compare position mod 2 to get odd or even rows to alter classes when needed like:

<xsl:choose>
    <xsl:when test="position() mod 2 = 1">
     <td class="odds">blah</td>
    </xsl:when>
    <xsl:otherwise>
        <td class="even">blah</td>
    </xsl:otherwise>
</xsl:choose>

EDIT: Getting my odd/even the right way around sigh