javascript - Implementing AJAX call on checkbox in Rails to update db -

rails newbie here.

i trying make checkbox called "active" act form when checkbox checked/unchecked , use ajax automatically update database changed attribute (without submit button). using instructions here: http://trevorturk.com/2010/08/24/easy-ajax-forms-with-rails-3-and-jquery/ can't seem make work correctly.

in view:

<%= form_for @post, :remote => true |f| %> <%= f.label :active %> <%= f.check_box :active, :class => 'submittable' %> <% end %> 

in posts_controller.rb

def update if @post.update(post_params)   flash[:notice] = "your post edited."   redirect_to post_path(@post) else   render :edit end end 

then made file called 'archive.js.erb' in views/posts folder code:

$('.submittable').live('change', function() {   $(this).parents('form:first').submit(); }); 

i've tried code, , problem seems on live method on javascript. works if change click function:

$(document).ready(function(){      $('.submittable').click(function() {         $(this).parents('form:first').submit();     });  });  

edit: forgot mention javascript included in app/assets/javascripts directory. because javascript must loaded on document.ready jquery ajax have effect want.

the arquive.js.erb file must exist in case have arquive action on controller, , javascript code in executed later. not case.