Code: Select all
<xsl:if test="custom24/@bool='True'">
<xsl:text> - </xsl:text>
<A HREF="StampList.xsl?Custom24=True@xslparam:doctitle={/data/fld/custom24/@name}: {custom24}" TARGET="_BLANK">
<xsl:value-of select="/data/fld/custom24/@name"/>
</A>
</xsl:if>

the code is similar to this discussion
viewtopic.php?f=12&t=151