_form.html.erb

<%= form_for @contact, :remote => true, :url => contacts_path, :html => { :novalidate => '' } do |f| %>
  <% if SpreeContactUs.require_name %>
    <p>
      <%= f.label :name, :class=>'label-field-control' %>
      <%= f.text_field :name, class: 'form-control' %>
    </p>
  <% end %>
  <p>

    <%= f.label :email, :class=>'label-field-control' %>
    <span class="required">(required)</span><br/>
    <%= f.email_field :email, class: 'form-control required email' %>
  </p>
  <% if SpreeContactUs.require_subject %>
    <p>
      <%= f.label :subject, :class=>'label-field-control' %>
      <%= f.text_field :subject, class: 'form-control' %>
    </p>
  <% end %>
  <p>
    <%= f.label :message, :class=>'label-field-control' %>
    <span class="required">(required)</span><br/>
    <%= f.text_area :message, class: 'form-control required' %>
  </p>
  <p>
    <%= f.submit 'Submit', :class => 'btn-minimal',:alt => t('submit'), :id => 'contact_us_contact_submit', :title => t('submit') %>
  </p>
<% end %>

contacts_controller.rb

class Spree::ContactUs::ContactsController < Spree::StoreController
  respond_to :html, :js
  helper "spree/products"
  
  def create
    @contact = Spree::ContactUs::Contact.new(params[:contact_us_contact])
    @contact.save
    respond_with @contact
  end
 
  def new
    @contact = Spree::ContactUs::Contact.new
  end
 
  private
 
  def accurate_title
    t('contact_us')
  end
end

create.js.erb

$("#new_contact_us_contact").html("Thanks")

new.html.erb

<strong class="title">Online Form</strong>
 
<%= render :partial => 'form' %>