app/views/exchange_rates/_form.html.erb
<%= form_for(@exchange_rate) do |f| %>
<%= f.error_messages %>
<div class="field">
<%= f.label :currency %><br />
<%= f.collection_select :currency_id, @currencies, :id, :display_name %>
</div>
<div class="field">
<%= f.label :rate %><br />
<%= f.text_field :rate %>
</div>
<script>
$(function(){
$('#exchange_rate_started_at').setCalendar({src:'/assets/calendar.png'});
});
</script>
<div class="field">
<%= f.label :started_at %><br />
<%= f.text_field :started_at, :value => Date.today.to_s %>
</div>
<div class="actions">
<%= f.submit %>
</div>
<% end %>