Assuming that you are building the table up through a process like this, you
can do it by using the position() function:

<xsl:template match="table">
  <table>
	<xsl:apply-templates />
  </table>
</xsl:template>

<xsl:template match="row[position() mod 2 = 0]">
  <tr><xsl:apply-templates /></tr>
</xsl:template>

<xsl:template match="row[position() mod 2 = 1]">
  <tr style="background-Color: red;"><xsl:apply-templates /></tr>
</xsl:template>


ie. all of the odd numbered rows will be red, and the evens will be clear.

Hope that helps,

Ben


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