- content_for :head_js do
  :javascript
    $(function() {
        $('.mash-image').click(function(elem) {
            $('#mash_winner_id').val($(elem.target).attr('data-map-id'));
            $('form[id^="edit_mash_"]').submit();
        });
    });

%h1 Mash the Maps!
%p Choose your fave.

- form_for(@mash) do |f|
  = f.error_messages

  #maps
    #map_a.mash-image
      %image{:src => "#{url_for @mash.map_a}.png", :'data-map-id' => @mash.map_a.id}
    #map_b.mash-image
      %image{:src => "#{url_for @mash.map_b}.png", :'data-map-id' => @mash.map_b.id}

  = f.hidden_field :winner_id, :value => '?'