Redirect back to where I came from when loggin in via the menu form

app/controllers/application_controller.rb

@@ -281,6 +281,9 @@ class ApplicationController < ActionController::Base
   end
 
   def redirect_back_or_default(default)
+    p params[:back_url].to_s
+    p URI.escape(CGI.unescape(params[:back_url].to_s))
+
     back_url = URI.escape(CGI.unescape(params[:back_url].to_s))
     if !back_url.blank?
       begin

app/views/account/_login.rhtml

 <div id="nav-login-content">
   <% form_tag({:controller => "account", :action=> "login"}) do %>
+    <%= hidden_field_tag('back_url', CGI.escape(request.url))  %>
     <table>
       <tr>
         <td><label for="username-pulldown"><%= l(:field_login) %></label></td>