store_page_on_session

class ApplicationController < ActionController::Base
  before_filter :page_params, :only => :index
  
  def page_key
    (self.class.to_s + "_page").to_sym
  end

  def page_params
    if params[:page] then
      session[page_key] = params[:page]
    elsif session[page_key]
      params[:page] = session[page_key]
    end
  end

end