orbit-basic/app/views/admin/ad_banners/_ad_image_update.html.erb

<%= fields_for "ad_banner[existing_ad_images][#{ad_image.id}]", ad_image do |f| %>
		<%= image_tag ad_image.file %> 
		<div>
			Destroy?<%= f.check_box :to_destroy %>
			<%= render :partial => "ad_image_form", :locals => { :f => f } %>
		</div>
<% end %>