def auto_complete_for_search_query
  if params.has_key( :search_query ) and not params[:search_query].blank?
    search_query = "%#{params[:search_query]}%"
    @cars = Car.find( :all, :conditions => [ 'title LIKE ?', search_query ] )
    render :partial => "search_results"
  end
end
 
def search_query
  auto_complete_for_search_query
end