prevent rails ajax form from reloading page

I know this is a common issue, but none of the results I've found fit my situation. I'm submitting a form with ajax, and I've been able to either submit with no page reload AND no dynamic partial loading, OR with a page reload rendering the partial. What I'm after is no page reload AND a partial being rendered on form submission.

HTML

<div id="form">
  <%= form_tag :action => 'create', :remote => true do %>
     <!-- SOME FORM FIELDS HERE -->
      <%= image_submit_tag '', :id => 'submit-button', :class => 'button' %>
  <% end %>
</div>

JS

$.ajax({
        type: "POST",
        action: "create",
        dataType: 'script',
        data: { SOME-DATA-HERE },
        success: handleSuccessfulSubmission()
    }).error(function (data) {
        console.log('ajax failed')
    });

    return false;

RUBY

def create

   respond_to do |format|

    ### DO SOME PROCESSING OF FORM DATA HERE

    format.js
   end

end

CREATE.JS.ERB

$("#container").html("<%= j (render partial: 'partial') %>");