I'm new to Umbraco and XSLT and have watched Pers great videos and read a few documents but have fallen at the first hurdle.

Depending on the active page, I would like to use a macro to render an ID selector to the pages' Body Tag based on a sections' parent node in order to apply CSS styles specific to that section. Thus all children will inherit the correct Body ID for that section and receive the correct styling from the stylesheet. I don't want to enter a property into the document type for the editor to enter each time they create a new article.

There's a few similar posts in the forums but nothing I've tried works. I tried Heather Mills' plugin but it renders a new ID selector for every page rather than each section.

I don't receive any errors but at the same time am not receiving any data. Could someone please point me in the right direction with some really basic tips? Am I using the correct output method? 

Here's one of the versions I tried which was very basic:

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE xsl:stylesheet [ <!ENTITY nbsp "&#x00A0;"> ]>

<xsl:stylesheet 

  version="1.0" 

  xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 

  xmlns:msxml="urn:schemas-microsoft-com:xslt" 

  xmlns:umbraco.library="urn:umbraco.library" xmlns:Exslt.ExsltCommon="urn:Exslt.ExsltCommon" xmlns:Exslt.ExsltDatesAndTimes="urn:Exslt.ExsltDatesAndTimes" xmlns:Exslt.ExsltMath="urn:Exslt.ExsltMath" xmlns:Exslt.ExsltRegularExpressions="urn:Exslt.ExsltRegularExpressions" xmlns:Exslt.ExsltStrings="urn:Exslt.ExsltStrings" xmlns:Exslt.ExsltSets="urn:Exslt.ExsltSets" 

  exclude-result-prefixes="msxml umbraco.library Exslt.ExsltCommon Exslt.ExsltDatesAndTimes Exslt.ExsltMath Exslt.ExsltRegularExpressions Exslt.ExsltStrings Exslt.ExsltSets ">

<xsl:output method="xml" omit-xml-declaration="yes"/>

<xsl:param name="currentPage"/>

<xsl:variable name="myID" select="$currentPage/ancestor::node [@level=2]"/>

<xsl:template match="/">

<!-- The fun starts here -->

  <xsl:value-of select="$myID" />

</xsl:template>

</xsl:stylesheet>

Heres the code which I got from Heather Mills' dynamic Body ID plugin. As you can see I tried to change the current page id to current page ancestor but without any joy.

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE xsl:stylesheet [ <!ENTITY nbsp "&#x00A0;"> ]>

<xsl:stylesheet 

  version="1.0" 

  xmlns:xsl="http://www.w3.org/1999/XSL/Transform" 

  xmlns:msxml="urn:schemas-microsoft-com:xslt"

  xmlns:fi="urn:schemas-floyd-innovations"

  xmlns:umbraco.library="urn:umbraco.library" xmlns:Exslt.ExsltCommon="urn:Exslt.ExsltCommon" xmlns:Exslt.ExsltDatesAndTimes="urn:Exslt.ExsltDatesAndTimes" xmlns:Exslt.ExsltMath="urn:Exslt.ExsltMath" xmlns:Exslt.ExsltRegularExpressions="urn:Exslt.ExsltRegularExpressions" xmlns:Exslt.ExsltStrings="urn:Exslt.ExsltStrings" xmlns:Exslt.ExsltSets="urn:Exslt.ExsltSets" xmlns:Designit.VideoEmbed="urn:Designit.VideoEmbed" xmlns:pdcalendar="urn:pdcalendar" xmlns:CWSHelper.twitter="urn:CWSHelper.twitter" 

  exclude-result-prefixes="fi msxml umbraco.library Exslt.ExsltCommon Exslt.ExsltDatesAndTimes Exslt.ExsltMath Exslt.ExsltRegularExpressions Exslt.ExsltStrings Exslt.ExsltSets Designit.VideoEmbed pdcalendar CWSHelper.twitter ">

<!--Util_BodyTag.xslt 2/24/2010-->

<!--Developed by Heather Floyd - http://HeatherFloyd.com-->;

<xsl:output method="xml" omit-xml-declaration="yes"/>

<!--MACRO PARAMS:                      

  TextForTag      Text to add to the tag (optional)  text

  IncludeClass  Add Class=[TemplateAlias]?  bool

-->

<xsl:param name="currentPage"/>

<xsl:variable name="TextForTag" select="macro/TextForTag"/>

<xsl:variable name="IncludeClass" select="macro/IncludeClass"/>

<xsl:template match="/">

<xsl:variable name="TemplateID" select="$currentPage/@template"/>

<xsl:variable name="TemplateName" select="fi:GetTemplateAlias($TemplateID)"/>

<xsl:variable name="NodeID" select="$currentPage/ancestor::node"/>

<xsl:variable name="BodyTagStart" select="concat('&lt;body id=&quot;Node',$NodeID,'&quot; ')"/>

<xsl:variable name="BodyTagEnd" select="concat($TextForTag,'&gt;')"/>

<xsl:if test="$IncludeClass=1">

  <xsl:value-of select="concat($BodyTagStart,'class=&quot;',$TemplateName,'&quot; ',$BodyTagEnd)" disable-output-escaping="yes"/>

</xsl:if>

<xsl:if test="string($IncludeClass)!='1'">

  <xsl:value-of select="concat($BodyTagStart,$BodyTagEnd)" disable-output-escaping="yes"/>

</xsl:if>

</xsl:template>

<msxml:script language="C#" implements-prefix="fi">

<msxml:assembly name="cms"/>

<msxml:assembly name="businesslogic"/>

<msxml:using namespace="umbraco.cms.businesslogic"/>

<msxml:using namespace="umbraco.cms.businesslogic.template"/>

<![CDATA[

public string GetTemplateAlias(int TemplateID)

{

  Template templateLookup = Template.GetTemplate(TemplateID);

      return templateLookup.Alias;

}

]]>

</msxml:script>

</xsl:stylesheet>

Any tips really apprecaited!