javascript - JS script is not working on create and delete actions -

i implementing 'acts_as_commentable_with_threading' , js script not working delete or create actions. have reload page comments added , removed page.

i have placed 'comments.js.coffee' file in 'app/assets/javascript' directory. looks following:

#comments.js.coffee  jquery -> # create comment   $(".comment-form")     .on "ajax:beforesend", (evt, xhr, settings) ->       $(this).find('textarea')         .addclass('uneditable-input')         .attr('disabled', 'disabled');     .on "ajax:success", (evt, data, status, xhr) ->       $(this).find('textarea')         .removeclass('uneditable-input')         .removeattr('disabled', 'disabled')         .val('');       $(xhr.responsetext).hide().insertafter($(this)).show('slow')  # delete comment   $(document)     .on "ajax:beforesend", ".comment", ->       $(this).fadeto('fast', 0.5)     .on "ajax:success", ".comment", ->       $(this).hide('fast')     .on "ajax:error", ".comment", ->       $(this).fadeto('fast', 1)    #in comments controller file wrote:  def create     @comment_hash = params[:comment]     @obj =  @comment_hash[:commentable_type].constantize.find(@comment_hash[:commentable_id])     # not implemented: check see whether user has permission create comment on object     @comment = comment.build_from(@obj, current_user, @comment_hash[:body])     if @comment.save       render :partial => "comments/comment", :locals => { :comment => @comment }, :layout => false, :status => :created     else       render :js => "alert('error saving comment');"     end   end  def destroy   @comment = comment.find(params[:id])   if @comment.destroy     render :json => @comment, :status => :ok   else     render :js => "alert('error deleting comment');"   end   end   end  # in catalogs controller code is:  def find_user @member = member.find(params[:id]) end   def show_user find_user   @comments = @member.comment_threads.order('created_at desc') @new_comment = comment.build_from(@member, @member.id, "","") respond_to |format|   format.html # show.html.erb   format.json { render json: @member }  end  end  #in comments model, code include:  acts_as_nested_set :scope => [:commentable_id, :commentable_type] attr_accessible :commentable, :body,:member_id,:sender validates :body, :presence => true,:length=>{:maximum=>1000} validates :member, :presence => true,:length=>{:maximum=>200} validates :sender,:presence=> true,:length=>{:maximum=>200}   belongs_to :commentable, :polymorphic => true  # note: comments belong user belongs_to :member   def self.build_from(obj, member_id, comment,sender) new \   :commentable => obj,   :member_id     => member_id,   :body        => comment,   :sender      => sender  end ...................  # in member model, add following lines: acts_as_commentable  has_many :comments, :dependent=>:destroy  # in view file 'show_user', wrote:  <div class='comments'> <%= render :partial => 'comments/form', :locals => { :comment => @new_comment }%>  <%= render :partial => 'comments/comment', :collection => @comments, :as => :comment %>     </div> #partial 'comments/comment' contains:  <div class='comment'>  <hr>  <b><%= comment.sender %> </b>  <small><%= comment.updated_at%></small> <%= link_to "×",comment_path(comment), :method =>   :delete, :remote => true, :confirm => "are sure want remove comment #  {comment.sender}?", :disable_with => "×", :class => 'close'%>   <p><%= comment.body.html_safe%></p>   </div> # in _form.html.erb file: <div class='comment-form'>  <%= simple_form_for comment, :remote => true |f|%> <small>leave comment </small><br/>  <%= f.input :sender,:as => :hidden,:input_html => { :rows => "2", :value =>"# {current_user.login}"}, :label => false %> <%= f.input :body, :input_html => { :rows => "2", :class =>"tinymce"}, :label => false %>    <%= f.input :commentable_id, :as => :hidden, :value => comment.commentable_id %>     <%= f.input :commentable_type, :as => :hidden, :value => comment.commentable_type %>    <%= f.button :submit, :class => "btn btn-primary", :disable_with => "submitting…" %>  <%end%>    </div> 

in config/routes file:

resources :comments, :only => [:create, :destroy]  #here output if click on 'create comments' button: 

i hope me. thank you.

i **deleted** jquery.min.js file app/assets/javascripts directory , in gem file added line : gem 'jquery-rails'  , used 'bundle install'  use gem in app. application.js file has 3 lines:  //= require jquery //= require jquery_ujs //= require_tree .  , in layout.html.erb file have line:  <%= javascript_include_tag  'application' %>  know pretty obvious. need things wrong  understand obvious better. can add , remove  messages using ajax , js files.