tracks/app/views/contexts/create.js.erb

<% if @saved -%>
  hide_empty_message();
  TracksForm.hide_errors();
  set_page_badge(<%= @down_count %>);
  add_context("<%=@context.hidden? ? 'hidden' : 'active'%>");
  clear_form();
<% else -%>
  TracksForm.show_errors(html_for_error_messages());
<% end -%>

function hide_empty_message() {
  $('contexts-empty-nd').hide();
}

function add_context(state) {
  $('#list-contexts-'+state).append(html_for_context_listing());
}

function clear_form() {
  $('#context-form').clearForm();
  $('#context-form input:text:first').focus();
}

function html_for_context_listing() {
  return "<%= @saved ? escape_javascript(render(:partial => 'context_listing', :locals => { :context_listing => @context })) : "" %>";
}

function html_for_error_messages() {
  return "<%= escape_javascript(error_messages_for('context')) %>";
}