xsl variable not resolved in javascript output

Hello list,

an xsl template outputs javascript code to display frames in the
resulting html. I am trying to use an xsl variable in the javascript
code to refer to the url to display with frames, but can't get the
correct syntax so that the xsl variable is resolved to a file name. Is
there a way to do this? I'm using xalan 2.6.0.

The code snippet of the xsl is shown below.

This is the xsl:variable definition:

<xsl:variable name="__Frameset_File_Name_token">index.htm</xsl:variable>

I have tried the following syntax to specify the xsl variable in the
outputted javascript but the xsl variable is not resolved:

xsl code: "{$__Frameset_File_Name_token}" + "?" + document.URL;
result in html: {$__Frameset_File_Name_token

xsl code: "$__Frameset_File_Name_token" + "?" + document.URL;
result in html: $__Frameset_File_Name_token?

xsl code: $__Frameset_File_Name_token + "?" + document.URL;
result in html:no show/hide links

xsl code: "'$__Frameset_File_Name_token'" + "?" + document.URL; =20
result in html: null filename. the link resolved to the containing
directory

xsl code: '$__Frameset_File_Name_token' + "?" + document.URL; =20
result in html:$__Frameset_File_Name_token

Thanks for your help,


Ann Marie


<!-- xsl code snippet -->

<xsl:template name="ShowTOCButton">


	<script language="javascript1.2" type="text/javascript">


  <xsl:comment><![CDATA[
  function showbook() {
  var showframeURL = '$__Frameset_File_Name_token' + "?" + document.URL;

  var hideframeURL = unescape(document.URL);

   if (window.self == top)
      {
 document.write("<a href='" + showframeURL + "' title='Show table of
contents and index'><font face='verdana, arial, helvetica, sans serif'
size='1'>Show Book</font></a>");
}

else
{
 document.write("<a href='" + hideframeURL + "' target='_top'
title='Hide table of contents and index'><font face='verdana, arial,
helvetica, sans serif' size='1'>Hide Book</font></a>");
}
   }
  showbook();

//]]></xsl:comment>
 </script>
</xsl:template>