_operation_form_child.html.erb

<% cms_unstyled_fields_for form_id, builder do |f| -%>

<tr>
<td width="240">
<% if condition == 'with' -%>
  <%= f.radio_buttons :operator, [['Show me accounts with', nil], ['Do not show me accounts with', 'not']], :label => '', :separator => '<br/><br/>' %>
  <br/>
<% else -%>
  <span style="padding-left:10px;"><%= builder.previous_operator == 'not' ? 'Do not show me accounts with'.t : 'Show me accounts with'.t  %></span>
  <br/><br/><br/>
<% end -%>

</td>
<td valign="middle">
  <%= f.grouped_select :field, builder.field_group_options, {}, :onchange => 'OperationBuilder.updateOperations();' %><br/><br/><br/>
</td>
</tr>

  <% if builder.operation_options.length > 0 -%>
    <div class="operation">
    <%= render :partial => 'operation_form_operation', :locals => {:builder => builder, :form_id => form_id} %>
    </div>
  <% end -%>

<% end -%>