How might I hide all the `<li>` elements that are not checked. What would be the best way to do this? Ruby or JavaScript?

```
<h3>Stores Offered In</h3>
  <ul class="multi-column-checkbox">
    <% for store in Store.all %>
        <li><%= check_box_tag "idea[store_ids][]", store.id,  
@idea.stores.include?(store) %> <%= store.name %></li>
    <% end %>
  </ul>
  <br />

```