Populating drop down menu based on selection in other dropdown

Question

Hi
I want to know a solution for populating 2 drop downs. The scene is that once the user has logged in he has to select a REGION. The options in region are EAST, WEST, NORTH, SOUTH, ALL.
On selecting the region a second drop down gets populated with the dealers of that particular region.
DROP DOWN 1 : REGION > NORTH
DROP DOWN 2 : DEALERS > ALL DEALERS IN NORTH.
Someone n Everyone please help me urgently.

Answer 1

ok here's what your servlet would look like:
public class getDealers extends HttpServlet {   
    public void doGet(HttpServletRequest request, HttpServletResponse response)  
    throws javax.servlet.ServletException, java.io.IOException  {
        // get the region selected from the form1
        String region = request.getParameter("region");
        if(region != null) {
            //calls a static method which selects dealers from a database or whatever  you have to do to get the list
            Collection listOfDealers = Dealers.findDealersByRegion(region);
            //puts the list in the session.
            request.getSession().setAttribute("listOfDealers", listOfDealers);
            // server side forward back to the page
            RequestDispatcher rd = this.getServletContext().getRequestDispatcher("/mypage.jsp");
            rd.forward(request, response);
        else {
            //handle error
}Hope this helps
good luck!