$("#<%= dom_id @archive_file_category %>").replaceWith("<%= j render :partial => 'archive_file_category', :collection => [@archive_file_category] %>");
<% @archive_file_category = ArchiveFileCategory.new(:display => 'List') # reset for new form %>
$(".edit_archive_file_category").replaceWith("<%= j render "form" %>")
$(".new_archive_file_category")[0].reset();