如何通过ajax刷新div？

目前，我正在开发一个使用Rails 3.0.3的网站，有个叫events的模型。在我的事件控制器.rb文件中，有如下代码：

def destroy
  @event = Event.find(params[:id])
  @event.destroy
  #redirect_to events_url
  respond_to do |format|
    format.html { redirect_to (events_url), :notice => 'Event deleted' }
    format.js
  end
end

我在那里有一个index.html.haml文件，如下：

- content_for :title do
  Listing Events

%div#event
  = render :partial => "task"

我有一个名为_task.html.haml的部分文件，其中分配了div id和ajax Remote true，如下所示：

- @events.each do |event|
  %ol.hoverbox
    %li.all{:id =>"event_#{event.id}"}
      = link_to image_tag(event.photo.url), event_path(event)
      .abc
        = event.name
        %br/
      .bca
        = event.start_date
        = event.start_time
        = link_to 'Delete', event, :confirm => 'Are you sure?',
                                   :method => :delete,
                                   :remote => :true

最后我在destroy.js.haml部分写了如下代码：

$('##{dom_id(@event)}').remove();

使用Ajax后成功删除了，但是计数器仍显示相同的值，手动刷新页面后计数器才会减少。请告诉我如何通过Ajax进行更新？在我的模型中，即Event.rb文件中，我计算了像这样的事件的NO值，以维护计数器：

   def current_date
        Date.today
    end

    def self.find_current
        Event.find :all, :conditions => ['(start_date  = current_date)'], :order => 'start_date '
    end

    def self.count_past(current_date = Date.today)
       Event.count :all, :conditions => ['start_date < ?', current_date], :order => 'start_date'
    end

    def self.count_upcoming(current_date = Date.today)
       Event.count :all, :conditions => ['start_date > ?', current_date], :order => 'start_date'
   end

    def self.count_today(current_date = Date.today)
        Event.count :all, :conditions => ['start_date = ?', current_date], :order => 'start_date'
    end

我还有一个部分，叫做subNav.html.haml Heer，用于在网页上显示计数：

      %li
        - if params[:controller] == "brands"
          // my code
        - elsif params[:controller] == "events"
          %a.blue.tt-top-center{:title => "Today's Events", :href => events_path(:view => "today") }#{Event.count_today}
          %span Today's Events

  %li
    - if params[:controller] == "brands"
 //my code
    - elsif params[:controller] == "events"
      /= link_to "Upcomming events", events_path(:view => "upcoming") 
      %a.tt-top-center{:title => "upcomming Events", :href => events_path(:view => "upcoming") }#{Event.count_upcoming}
      %span Upcoming Events

我搜索了许多链接，都没有办法为我提供帮助。所以请帮助我，使用相同的名称、类和网址，以便在我的代码中使用。真心感谢你的帮助！

put $('##{dom_id(@event)}').reset(); in destroy.js.erb file.