问为什么我的jquery不能在使用js.erb的Rails3中工作？

EN

  1 $(".total-vote-count").val("#{@plusminus}")
  2 $("a.vote-up-off").addClass("vote-up-on")

 11     #voting
 12       #vote-count
 13         = link_to "Vote Up", {:controller => 'reviews', :action => 'vote_up', :id => @review.id},
 14                              {:class => "#{@vote_up_status}", :remote => true }
 15       
 16         %span.total-vote-count
 17           = @review.plusminus
 18 
 19         = link_to "Vote Down", {:controller => 'reviews', :action => 'vote_down', :id => @review.id},
 20                                {:class => "#{@vote_down_status}", :remote => true}