anchor.diff:    </c:when>
     <c:otherwise>
        <c:if test="${!fn:contains(flylabels, etrack.track)}">
  -       <c:set var="flylabels" value="${flylabels}-${etrack.track}" />
  +       <c:set var="flylabels" value="${flylabels}%2F${etrack.track}" />
        </c:if>
     </c:otherwise>
     </c:choose>
  
positive.code: 
  <c:if test="${flyTracksCounter > 1 }">
  <b><html:link
       href="${WEB_PROPERTIES['gbrowse.prefix']}/fly/?label=${flylabels}" target="_blank" title="View all the tracks for this experiment">
       All ${flyTracksCounter} tracks
  </html:link></b>
          <img border="0" class="arrow" src="model/images/f_vvs.png" title="fly"/>
  
negative.code: </c:if>
  <c:if test="${wormTracksCounter > 1 }">
  <b><html:link
       href="${WEB_PROPERTIES['gbrowse.prefix']}/worm/?l=${wormlabels}" target="_blank" title="View all the tracks for this experiment">
       All ${wormTracksCounter} tracks
  </html:link></b>
          <img border="0" class="arrow" src="model/images/w_vvs.png" title="worm"/>
  