gistfile1.rb

 Deface::Override.new(:virtual_path => "spree/products/_cart_form",
                      :name => "example-1",
                      :replace => ".add-to-cart",
                      :text => %{          <% if @product.has_stock? || Spree::Config[:allow_backorders] %>
            <%= number_field_tag (@product.has_variants? ? :quantity : "variants[#\{@product.master.id\}]"),
              1, :class => 'title', :in => [email protected]_hand %>
 <input type="image" src="rainbow.gif" name="image" width="60" height="60">
          <% else %>
            <%= content_tag('strong', t(:out_of_stock)) %>
          <% end %>})