Im having problems trying to select a radom node from a list of nodes in my xslt:

<?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 myfunctionlib"

 

  xmlns:myfunctionlib="urn:myfunctionlib"

  xmlns:PS.Helpers="urn:PS.Helpers"

  >

 

 

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

 

<![CDATA[

Random r = new Random();

 

public int RandomPos(int max) {

    return r.Next(max);

}

]]>

</msxml:script>

 

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

 

<xsl:param name="currentPage"/>

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

<xsl:variable name="maxresults" select="/macro/MaxResults" />

 

<xsl:template match="/">

 

 

 

  <img src="/images/my-collection/black-up.jpg" id="mycollup" />

  <ul>

 

 

    <xsl:variable name="selectsourcenode" select="umbraco.library:GetXmlNodeById($source)" />

    <xsl:call-template name="displayrow">

    <xsl:with-param name="getNode" select="$selectsourcenode" />

    <xsl:with-param name="counter" select="1" />

    <xsl:with-param name="maxrows" select="count($selectsourcenode//TextImageData)" />

    </xsl:call-template>

  </ul>

  <img src="/images/my-collection/black-down.jpg" id="mycolldown" />

 

</xsl:template>

 

    <xsl:template name="displayrow">

      <xsl:param name="counter" />

      <xsl:param name="maxrows" />

 <xsl:param name="getNode" />

      <xsl:variable name="smallcase" select="'abcdefghijklmnopqrstuvwxyz'" />

      <xsl:variable name="uppercase" select="'ABCDEFGHIJKLMNOPQRSTUVWXYZ'" />

 

      <xsl:variable name="ranNodeNum" select="myfunctionlib:RandomPos($maxrows)" />

        <xsl:variable name="nonrandomnode" select="$getNode//TextImageData[position()=$ranNodeNum]"/>

<xsl:variable name="randomnode" select="$nonrandomnode [not(@id=preceding-sibling::node/@id)]"/>

<xsl:value-of select="$maxrows"/>

 

      <xsl:choose>

          <xsl:when test="$randomnode/member != ''">

            <li class="licomment">

 

            <xsl:variable name="mxml" select="umbraco.library:GetMember($randomnode/member)" />

            <div class="myCollectionLatest" id="mycollectioncomment{$counter}">

              <div style="float:left;">

                <div class="colltoppic">

                  <a href="/my-collection.aspx?memberId={$mxml/*/@id}">

            <img src="{$mxml/node/profilePicture}" width="74" height="74" onerror="ImgError(this);" />

 

                  </a>

                </div>

                <xsl:choose>

                  <xsl:when test="string-length($randomnode/image) &gt; 1">

                    <div class="commentimage ie6commentimageifx" style="clear:both;">

                      <img src="{$randomnode/image}"  width="74" height="74" />

                    </div>

                  </xsl:when>

                  <xsl:otherwise>

                    <div class="commentimage ie6commentimageifx" style="clear:both;">

                      <img src="/images/my-collection/c2k-tip-placeholder.jpg"  width="74" height="74" />

                    </div>

                  </xsl:otherwise>

                </xsl:choose>

                <div style="float:left; position:absolute; margin-left:83px; margin-top:-84px; width:160px;" class="mycolllatestlinks">

 

                    <b>

                      <xsl:variable name="parent" select="$randomnode/@parentID">

 

                        </xsl:variable>

                      <!--  <xsl:variable name="granparent" select="$randomnode/../../@id" /> -->

<!--<xsl:choose>

this is the check to see if a gran-parent exsists, currently some nodes reference an incorrect parent id-->

<!-- <xsl:when test="contains($granparent/@path, '-1')">

<a href="/my-collection.aspx?memberId={$mxml/*/@id}" class="usernamelinkdiv">

<xsl:value-of select="translate($mxml/node/screenName, $smallcase, $uppercase)"/>

</a> SAID 

</xsl:when>

<xsl:otherwise> -->

 

<xsl:choose>

<xsl:when test="string-length($randomnode/../../@nodeName) &gt; 0">

<a href="/my-collection.aspx?memberId={$mxml/*/@id}" class="usernamelinkdiv">

<xsl:value-of select="translate($mxml/node/screenName, $smallcase, $uppercase)"/>

</a> SAID ABOUT

 

<span class="pinkTxt">

 

<br />

 

<xsl:choose>

<xsl:when test="name($randomnode/../../.) = 'ProductCategory'">

<a href="{umbraco.library:NiceUrl($randomnode/../../@id)}?categoryId=1">

<xsl:value-of select="translate($randomnode/../../@nodeName, $smallcase, $uppercase)"/>

</a>

</xsl:when>

<xsl:when test="name($randomnode/../../.) = 'ProductSubCategory'">

<a href="{umbraco.library:NiceUrl($randomnode/../../@id)}?searchingForProduct=1">

<xsl:value-of select="translate($randomnode/../../@nodeName, $smallcase, $uppercase)"/>

</a>

</xsl:when>

<xsl:otherwise>

<a href="{umbraco.library:NiceUrl($randomnode/../../@id)}">

<xsl:value-of select="translate($randomnode/../../@nodeName, $smallcase, $uppercase)"/>

</a>

</xsl:otherwise>

 

</xsl:choose> 

 

</span>

</xsl:when>

 

<xsl:otherwise>

<a href="/my-collection.aspx?memberId={$mxml/*/@id}">

<xsl:value-of select="translate($mxml/node/screenName, $smallcase, $uppercase)"/>

</a> SAID

</xsl:otherwise>

</xsl:choose>

<!--add this because some comments didnt seem to have a product against them-->

<!-- </xsl:otherwise>

</xsl:choose>-->

                    </b>

 

                  <p>

                  <xsl:value-of select="substring(umbraco.library:StripHtml($randomnode/text),1,120)" />...

                </p>

 

                </div>

                <div class="randomCommentsSeeMore">

                  <span class="pinkTxt">

                    <a href="/my-collection.aspx?memberId={$mxml/*/@id}">

                      See more <img src="/images/navControls/more-arrow.jpg" alt="see more" />

                    </a>

                </span>

                </div>

              </div>

 

            </div>

 

 

          </li>

            <xsl:if test="$counter &lt; $maxresults">

 

              <xsl:call-template name="displayrow">

 <xsl:with-param name="getNode" select="$getNode" />

                <xsl:with-param name="counter" select="$counter + 1" />

                <xsl:with-param name="maxrows" select="$maxrows" />

              </xsl:call-template>

 

            </xsl:if>

       </xsl:when>

      <xsl:when test="$randomnode/member = ''">

        <xsl:if test="$counter &lt; $maxresults">

 

          <xsl:call-template name="displayrow">

 <xsl:with-param name="getNode" select="$getNode" />

            <xsl:with-param name="counter" select="$counter" />

            <xsl:with-param name="maxrows" select="$maxrows" />

          </xsl:call-template>

 

        </xsl:if>

      </xsl:when>

      <xsl:otherwise>

        <xsl:if test="$counter &lt; $maxresults">

 

          <xsl:call-template name="displayrow">

 <xsl:with-param name="getNode" select="$getNode" />

            <xsl:with-param name="counter" select="$counter" />

            <xsl:with-param name="maxrows" select="$maxrows" />

          </xsl:call-template>

 

        </xsl:if>        

      </xsl:otherwise>

      </xsl:choose>

    </xsl:template>

 

</xsl:stylesheet>

 

im trying to get a scrollable list of random items. maxrows currently equals 541 rows and the maxresults is 10. if i change the randomPos method at the top of the xslt to return a low number like 

return r.Next(12) + 1; instead of the maxrow parameter its alot quicker, i dont get it though surely this is just going to just spit out 10 random numbers, there shouldnt be any calculations that would slow it down. any ideas?