respond_to do |format|
      format.json { render :json => content.as_json, :status => :ok }
      format.js { render :json => content.as_json, :status => :ok }
      format.xml { render :xml => content.to_xml, :status => :ok }
      format.any { render :text => window_content(displayed_data, content), :status => :ok }