Umbraco: Display an Image, if one has been selected, using the Media Picker in an XSLT Macro

Umbraco: Display an Image, if one has been selected, using the Media Picker in an XSLT Macro

The follwoing XSLT file shows how to display an image from the Media Picker in Umbraco. 
The important bit is highlighted.

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE xsl:stylesheet [ <!ENTITY nbsp "&#x00A0;"> ]>
 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:template match="/">
   <xsl:variable name="getimg" select="$currentPage/rightColumnImage"/>  <!-- 1. Get the Image -->   <xsl:if test="string($getimg)!=''"> <!--2. If an Image has been chossen, then do the following -->             <div id="myimage">           <!-- 3. Just a CSS div to hold the image-->                 <xsl:variable name="media" select="umbraco.library:GetMedia($currentPage/rightColumnImage, 0)" />  <!-- 4 assign the image to a variable 'media' -->                <img src="{$media/umbracoFile}" alt="{$media/altText}" /> <!--5. Write out the Image -->
      <!--<xsl:value-of select="$getimg" disable-output-escaping="yes"/>-->

  <xsl:variable name="getcaption" select="$currentPage/rightColumnImageText"/>
  <xsl:if test="$getcaption != ''">
   <div id="mycaption">
      <xsl:value-of select="$getcaption" disable-output-escaping="yes"/>


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