i have a problem in a menu i built, where i want set an "active" class on the <a> tag of the page and its parent when the page is selected.

<a href="{umbraco.library:NiceUrl(@id)}">
   <xsl:if test="$currentPage/ancestor-or-self::node/@id = current()/@id">
        <xsl:attribute name="class">active</xsl:attribute>
   </xsl:if>  
   <xsl:value-of select="@nodeName"/>
</a> 

does'nt apply "active" to any <a> , whereas the following sets the current page to "active" just fine

<a href="{umbraco.library:NiceUrl(@id)}">
   <xsl:if test="$currentPage/@id = current()/@id">
      <xsl:attribute name="class">active</xsl:attribute>
   </xsl:if>  
   <xsl:value-of select="@nodeName"/>
</a>