app/views/medium_of_performances/_form.html.erb
<%= form_for(@medium_of_performance) do |f| %>
<%= f.error_messages %>
<div class="field">
<%= f.label :name %><br />
<%= f.text_field :name %>
</div>
<div class="field">
<%= f.label :display_name %><br />
<%= f.text_area :display_name %>
</div>
<div class="field">
<%= f.label :note %><br />
<%= f.text_area :note %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<%= javascript_tag("$('#medium_of_performance_name').focus()") -%>
<% end %>