How do you expand items in a list of items in jsp page

Question

I have this list of task items being retrieved from the data from master table:
     <%
     List taskList = (List) request.getAttribute("searchresult");
     if (searchresultList.size() != 0) { 
     for (Iterator itr=searchresultList.iterator(); itr.hasNext(); )
          TaskList  workList =
        (taskList )itr.next();
     %>     
     <tr>
          <td>
                 <a href="/taskItemDetail.do?itemId=<%=taskList.getId()%>" >
                <%=taskkList.getId()%></a>
          </td>
          <td><%=taskList.getTask()%></td>
          <td><%=taskList.getDate()%></td>
     </tr>
<%}%>
now when I click on the above link I want to be able to get the detail for that item from
the detail table and want to be able to show it inbetween the other master tables results.
Kind of like when you expand an item in windows folders by clicking the plus sign (+).

Answer 1

Basically you have two choices. You can include the whole, expanded list in your HTML, and use Javascript on the client side to fold and unfold sections, or you can maintain a list of folded items in your web app, and have transactions which alter this list and return an appropriate new page.
Remember, JSPs are not interactive. All they do is generate HTML.
Ideally, store the folding state on the page (e.g. encoded into a hidden field). You could put it in Session, but then if you have two browser windows open on the same browser windows can interfere with one another.