gistfile1.txt

/* markup */
<%= content_for :sidebar do %>
  <ul class="sortable">
  <% @page_parts.each do |f| %>
    <li id="menu_<%= f.id %>"><%= f.title %></li>
  <% end %>
  </ul>
<% end %>



/* jquery */
$(document).ready(function() {
    $(".sortable").sortable({
        update : function (){ 
            $.ajax(
            {   
                type: "POST",
                url: "/page_parts/sort/",
                data:
                {   
                sort:$(".sortable").sortable('serialize'),
                },  
            }); 
         }   
    }); 
});