Change the design for the whole site form designs index

app/views/admin/designs/_design.html.erb

@@ -9,6 +9,7 @@
 			</ul>
 		</div>
 	</td>
+	<td class="span1"><%= radio_button_tag 'design_default', design.id, (@site.design.id.to_s.eql?(design.id.to_s) ? true : false), :class => 'design_default', :rel => admin_sites_path %> <%=@site.design.id.to_s.eql?(design.id.to_s)%></td>
   <td class="span7"><%= design.intro %></td>
   <td class="span2"><%= design.author %></td>
 </tr>

app/views/admin/designs/_designs.html.erb

@@ -2,6 +2,7 @@
 	<tr>
 		<th class="span1 strong"></th>
 		<th class="span2"></th>
+    <th class="span1"></th>
 		<th class="span7"></th>
 		<th class="span2"></th>
 	</tr>
@@ -9,4 +10,15 @@
 <tbody>
 <tbody id="tbody_designs" class="sort-holder">
 	<%= render :partial => 'design', :collection => @designs %>
-</tbody>
+</tbody>
+
+<% content_for :page_specific_javascript do %>
+  <script>
+    $(document).ready(function(){
+      $(document).on('change', '.design_default', function(){
+        $(this).attr('value');
+        $.getScript($(this).attr('rel') + '/' + $(this).val() + '/change_design');
+      }); 
+    }); 
+  </script>
+<% end %>

app/views/admin/designs/_sort_headers.html.erb

@@ -1,4 +1,5 @@
 <%= render_sort_bar(true, delete_admin_designs_path(:direction => params[:direction], :sort => params[:sort], :sort_options => params[:sort_options]),
  ['title', 'title','span2', :title],
+                          ['', '', 'span1', :default],
                           ['intro', 'intro', 'span7', :intro],
 													['author', 'author', 'span2', :author]).html_safe %>