<script>
  window.onbeforeunload = function() {
    var inputs = document.getElementsByTagName('input');
    var unfinished = 'false';
    for (var i = 0; i < inputs.length; ++i) {
      if (inputs[i].value != '') {
        unfinished = 'true';
      }
    }
    if (unfinished == 'true') {
      return 'Are you sure you want to leave?';
    }
  }
</script>

<input type="submit" name="commit" value="Edit product" class="btn btn-warning btn-block" data-disable-with="Edit product">

<input type="submit" name="commit" value="Edit product" class="btn btn-warning btn-block" data-disable-with="Edit product" disabled="">

<%= simple_form_for @pack, url: pack_path(@pack), method: :patch do |f| %>
<%= render 'shared/error_messages', object: f.object %>
  <%= f.input :title, class: "form-control center" %>
  <%= f.input :description, :as => :ckeditor, input_html: {:ckeditor => {:toolbar => 'FULL'}}, class: "form-control left" %>
  <%= f.input :pack_contents, :as => :ckeditor, input_html: {:ckeditor => {:toolbar => 'FULL'}}, class: "form-control left" %>
  <%= f.input :pack_type, class: "form-control center" %>
  <%= f.input :category_id, prompt: "Select Category", collection: [ "sample-pack", "vocal-pack", "preset-pack", "track-pixel", "track-indie", "track-orchestral"], input_html: { class: "form-control center" } %>
  <%= f.input :price, class: "form-control center" %>
  <%= f.input :audio_embed, class: "form-control center" %>
  <%= f.input :video_embed, class: "form-control center" %>
  <%= f.input :art_link, prompt: "ENTER N/A IF STRACK", class: "form-control center" %>
  <%= f.input :download_url, class: "form-control center" %>
  <%= f.submit "Edit product", class: "btn btn-warning btn-block" %>
  <% end %>
  <%= link_to "Cancel", packs_path, class: "btn btn-danger top-drop" %>