Hi Craig,

Might be two separate problems here - first one is when you save the XSLT, Umbraco will run the transform using the Content node as $currentPage, so some functions (like the NiceUrl() one) will fail if not guarded against. Sometimes you can work around this by clicking the Skip errors checkbox before saving.

Second one is how you build the attribute, which you didn't mention - but here's some code to get you started:

<xsl:variable name="delidcode" select="umbraco.library:GetCurrentMember()/delegateid" />

<xsl:template match="/">
    <!-- Don't do anything if no current member -->
    <xsl:if test="$delidcode">
        <a href="{umbraco.library:NiceUrl($currentPage/@id)}?delidcode={$delidcode}">
            <xsl:value-of select="$currentPage/@nodeName" />
        </a>
    </xsl:if>
</xsl:template>

/Chriztian