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

replace_context_with_edit_form();

function replace_context_with_edit_form() {
  $('div#<%=dom_id(@context)%>').fadeOut(250, function() {
    show_edit_form();
    set_focus();
  });
}

function show_edit_form() {
  $('div#<%=dom_id(@context, 'edit')%>').html(html_for_edit_form());
  $('div#<%=dom_id(@context, 'edit')%>').fadeIn(500);
}

function set_focus() {
  $('input.context-name').focus();
}

function html_for_edit_form() {
  return "<%= escape_javascript(render(:partial => 'context_form', :object => @context)) %>"
}