Refresh Table Wihtout Reload or Refresh Jsp Page

hi experts

i m getting data from mysql database in jsp page. i m creating connection from simple java class and after connected to database i m calling a method which returns Resultset like


 public ResultSet list()
{
  return rs;
}

and on Jsp page i calling rs and getting all columns data in table form

like

  <table border="0" cellpadding="1" cellspacing="0" id="myTable" class="tablesorter">

                        <tr>

                            <th width="1%"></th>
                            <th><span class="style11">&nbsp;Name</span></th>
                              <th ><span class="style11">&nbsp;City </span></th>
                                <th ><span class="style11">&nbsp;Address </span></th>
                                <th width="3%"></th>

                        </tr>
                 

                    <tbody id="mmm">
<%
        try {
           
         
            while (rs.next())

               {
             
%>
        <tr style="height:22px;" id="ref">

 

                            <tdr">&nbsp;<%= rs.getString("Name")%></td>
                              <td ">&nbsp;<%=  rs.getString("City")%></td>
                              <td ">&nbsp;<%=  rs.getString("Address")%></td>
                                                   <div>
                                                             </div>
                         
                        </tr>

<%
        }
        } catch (Exception ex) {
            ex.printStackTrace();
        }

%>
                   

                </table>



i successfully getting this but my problem is ::    i want to get all this and more new column data  every 40 or 50 seconds without reloading or refresh jsp page..

please tell me how to do this ?

thanks in advance..