[xsl] how find out end position using 'for' loop

["JS Rawat" <jrawat@xxxxxxxxxxxxxx>]

Hi Everybody,
Have anyone any idea about the below problem. I want + sign between two
RefArray (RefArray[11] + RefArray[12]) but not in the last (RefArray[12]+
RefArray[13]+ should be RefArray[12]+ RefArray[13]).

Input
<link class="bibcit" rid="FileName_bib11">11&#x2013;13</link>

XSLT

<xsl:template match="link">
 <xsl:choose>
  <xsl:when test="@class='bibcit'">
     <xsl:variable name="bibtext" select="."/>
     <xsl:choose>
      <xsl:when test="contains($bibtext, '&#x2013;') and
substring-before($bibtext,'&#x2013;') castable as xs:integer">
        <xsl:variable name="start"
select="xs:integer(substring-before($bibtext,'&#x2013;'))"/>
        <xsl:variable name="end"
select="xs:integer(substring-after($bibtext,'&#x2013;'))"/>
        <a class="bibcit" href="references.htm#{substring-after(@rid,'_')}"
onmouseout="startTimeout()">
         <xsl:attribute name="onmouseover">refpopup('REF',<xsl:value-of
select="for $i in $start to $end return
concat('RefArray[',$i,']+')"/>)</xsl:attribute><xsl:apply-templates/></a>
      </xsl:when>
     </xsl:choose>
   </xsl:when>
  </xsl:choose>
</xsl:template>

OUTPUT
<a class="bibcit" href="references.htm#bib11" onmouseout="startTimeout()"
onmouseover="refpopup('REF',RefArray[11]+ RefArray[12]+
RefArray[13]+)">11C"b,b13</a>


Desired OUTPUT
<a class="bibcit" href="references.htm#bib11" onmouseout="startTimeout()"
onmouseover="refpopup('REF',RefArray[11]+ RefArray[12]+
RefArray[13])">11C"b,b13</a>

Thanks in advance.

...JSR