title: jsp display:table how to display child rows
body: <p>I have a jsp and I use display:tag. I want to display child rows when I click in a row. I look for a tutorial but I don't find it.</p>
  
  <p>This is my jsp:</p>
  
  <pre><code>&lt;display:table id="ev" name="vcomposiciones" class="display" sort="list" defaultsort="3" defaultorder="ascending" export="true" style="width:90%" requestURI="/copernico/SrvRenfeDatawarehouse" varTotals="totales"&gt;
                  &lt;display:setProperty name="export.excel.filename" value="Composiciones.xls"/&gt;
                  &lt;display:column property="fecha" sortable="true" headerClass="sortable" title="Fecha" /&gt;
                  &lt;display:column property="tren" sortable="true" headerClass="sortable" title="Tren" /&gt;
                  &lt;display:column property="numVagon" sortable="true" headerClass="sortable" title="Vagón nº" /&gt;
                  &lt;display:column property="nombreOrigen" sortable="true" headerClass="sortable" title="Origen" /&gt;            
                  &lt;display:column property="nombreDestino" sortable="true" headerClass="sortable" title="Destino" /&gt;
                  &lt;display:column property="codMercancia" sortable="true" headerClass="sortable" title="Mercancía" /&gt;
                  &lt;display:column property="longitud" sortable="true" headerClass="sortable" title="Long." format="{0,number,0.00}" total="true"/&gt;    
                  &lt;display:column property="ejes" sortable="true" headerClass="sortable" title="Ejes" total="true"/&gt;
                  &lt;display:column property="tara" sortable="true" headerClass="sortable" title="Tara" format="{0,number,0.00}" total="true"/&gt;
                  &lt;display:column property="carga" sortable="true" headerClass="sortable" title="Carga" format="{0,number,0.00}" total="true"/&gt;   
                  &lt;display:column property="regimen" sortable="true" headerClass="sortable" title="Régimen" /&gt;    
                  &lt;display:column property="uti" sortable="true" headerClass="sortable" title="C47" /&gt;    
                  &lt;display:column property="ate" sortable="true" headerClass="sortable" title="A.T.E." /&gt;
                  &lt;display:column property="numeroExpedicion" sortable="true" headerClass="sortable" title="Exp." /&gt;
  
                   &lt;display:footer&gt;
                      &lt;tr class="footer"&gt;
                        &lt;td align="right" colspan="5"&gt;&lt;h2&gt;TOTAL&amp;nbsp;&amp;nbsp;&amp;nbsp;&lt;/h2&gt;&lt;/td&gt;
                        &lt;td align="center"&gt;&lt;b&gt;Vagones&lt;/b&gt;&lt;/br&gt;&lt;c:out value="${vcomposicionSize}" /&gt;&lt;/td&gt;
                        &lt;td align="center"&gt;&lt;b&gt;Long.&lt;/b&gt;&lt;/br&gt;&lt;fmt:formatNumber type = "number" pattern="0.00" value="${totales.column7}" /&gt;&lt;/td&gt;
                        &lt;td align="center"&gt;&lt;b&gt;Ejes&lt;/b&gt;&lt;/br&gt;&lt;fmt:formatNumber type = "number" pattern="0" value="${totales.column8}" /&gt;&lt;/td&gt;
                        &lt;td align="center"&gt;&lt;b&gt;Tara&lt;/b&gt;&lt;/br&gt;&lt;fmt:formatNumber type = "number" pattern="0.00" value="${totales.column9}" /&gt;&lt;/td&gt;
                        &lt;td align="center"&gt;&lt;b&gt;Carga&lt;/b&gt;&lt;/br&gt;&lt;fmt:formatNumber type = "number" pattern="0.00" value="${totales.column10}" /&gt;&lt;/td&gt;
                      &lt;tr&gt;
                   &lt;/display:footer&gt;
              &lt;/display:table&gt;        
  </code></pre>
  
  <p>How can I find information about display:table? How can I do child rows?</p>