Modalne okno

Witam,
Jak zrobić, aby widok register.jsp pojawiał się jako okno modalne, a nie tak jak teraz, że jest przekierowanie? Raczej wklejania kodu od rejestracji do pliku layoutu mija się celem.
Mam plik register.jsp

 
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ taglib uri="http://www.springframework.org/tags" prefix="spring" %>
<%@ taglib uri="http://www.springframework.org/tags/form" prefix="form" %>

<c:if test="${param.success eq true}">
    <div class="alerts">
        <div class="alert alert-success">Rejestracja zakończona pomyślnie! Możesz się teraz zalogować.</div>
    </div>
</c:if>

<!-- Modal -->
<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">
    <div class="modal-dialog" role="document">
        <div class="modal-content">
            <div class="modal-header">
                <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span
                        aria-hidden="true">&times;</span></button>
                <h4 class="modal-title" id="myModalLabel">Modal title</h4>
            </div>
            <div class="modal-body">
                <div class="register-panel">
                    <div class="panel panel-info">
                        <div class="panel-heading">
                            <h3 class="panel-title"><spring:message code="page.register.header"/></h3>
                        </div>
                        <div class="panel-body">
                            <form:form commandName="user" cssClass="form-register">

                                <div class="form-group">
                                    <label for="email" class="col-sm-2 control-label"><spring:message
                                            code="page.register.email"/></label>

                                    <div class="col-sm-10">
                                        <form:input path="email" cssClass="form-control"/>
                                    </div>
                                </div>

                                <div class="form-group">
                                    <label for="password" class="col-sm-2 control-label"><spring:message
                                            code="page.register.password"/></label>

                                    <div class="col-sm-10">
                                        <form:password path="password" cssClass="form-control"/>
                                    </div>
                                </div>

                                <div class="form-group">
                                    <label for="name" class="col-sm-2 control-label"><spring:message
                                            code="page.register.name"/></label>

                                    <div class="col-sm-10">
                                        <form:input path="name" cssClass="form-control"/>
                                    </div>
                                </div>

                                <div class="form-group">
                                    <label for="name" class="col-sm-2 control-label"><spring:message
                                            code="page.register.lastname"/></label>

                                    <div class="col-sm-10">
                                        <form:input path="lastname" cssClass="form-control"/>
                                    </div>
                                </div>


                                <div class="form-group">
                                    <div class="col-sm-12">
                                        <input type="submit" value="<spring:message code="page.register.btn.register"/>"
                                               class="btn btn-lg btn-primary pull-right"/>
                                    </div>
                                </div>
                            </form:form>
                        </div>
                    </div>
                </div>
            </div>
            <div class="modal-footer">
                <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>
                <button type="button" class="btn btn-primary">Save changes</button>
            </div>
        </div>
    </div>
</div>

layout.jsp

 
                <c:if test="${pageContext['request'].userPrincipal == null}">
                    <li><a href="${pageContext.request.contextPath}/register"><spring:message
                            code="page.register.btn.register"/></a></li>
                    <li><a href="${pageContext.request.contextPath}/login"><spring:message
                            code="page.layout.btn.sigin"/> </a></li>
                </c:if>

Kontroler:

package com.springapp.mvc.controller;

import com.springapp.mvc.domain.User;
import com.springapp.mvc.service.UserService;
import com.springapp.mvc.service.impl.UserServiceImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import java.security.Principal;


/**
 * Created by Marcin on 2015-09-22.
 */
@Controller
public class UserController {
    @Autowired
    private UserService userService;

    @RequestMapping("/users")
    public String users(Model model) {
        model.addAttribute("users", userService.findAll());
        return "users";
    }

    @RequestMapping(value = "/register", method = RequestMethod.GET)
    public String showRegister(Model model) {
        model.addAttribute("user", new User());
        return "register";
    }

    @RequestMapping(value = "/register", method = RequestMethod.POST)
    public String doRegister(@ModelAttribute("user") User user) {
        userService.save(user);
        return "redirect:register?success=true";
    }
}