如何创建一个AJAX按钮？

I'm new to ROR programming and my question might seem newbie!

I have a Rails project. I need to save the subscribers data without refreshing the page!

In the last line of code block "app/views/users/new.html.haml" I need to change the form.button to An ajax button. I have included jQuery in the project. How should I code this? please consider that im beginner when you answer!

Thank you in advanced! (-_^)

This is routes:

users_new GET  /users/new(.:format)    users#new
users     GET  /users/index(.:format)  users#index
create    POST /users/create(.:format) users#create

This is my app/views/users/new.html.haml:

.form1
  %h1
    Subscriber
  =form_for @user, :url => :create do |form|
    - unless @user.errors.empty?
      - @user.errors.full_messages.each do |message|
        .alert.alert-danger
          %ul
            - @user.errors.full_messages.each do |message|
              %li= message
    %div
      .row.form-group
        .col-lg-3
          %label
            Email:
          =form.text_field :email, :class => 'form-control'
      .row.form-group
        .col-lg-3
          %label
            Name:
          =form.text_field :name, :class => 'form-control'
      .row.form-group
        .col-lg-3
          %label
            Phone Number:
          =form.text_field :phone_number, :class => 'form-control'
      .row.form-group
        .col-lg-3
          %label
            Address:
          =form.text_field :address, :class => 'form-control'
      %div=form.button 'Save', :class => 'btn btn-primary'

This is app/controllers/users_controller.rb:

 class UsersController < ApplicationController

   def index
   end

   def new
     @user = User.new
   end

   def create
     @user = User.new params[:user]
     @user.save
     redirect_to users_new_path
   end

 end

To make the form into an ajax form really all you need to do is set remote option to true, this will automatically send the form using ajax:

=form_for @user, :url => :create, :remote => true do |form|

You will also need to create some response to it. Here is a great railscast on the topic: http://railscasts.com/episodes/136-jquery-ajax-revised