Here it is:
<% set_editor_comment %>
<%= form_for @article do |f| %>
<%= render "shared/error_messages", :target => @article %>
<% if admin? %>
<p>
<%= f.label :user_id %>
<%= f.select :user_id, User.authors_and_admins.collect {|p| [ p.username,
p.id ] } %>
</p>
<% end %>
<p>
<%= f.label :category_id %><%= mark_required(@article, :category_id) %><br/>
<%= f.select :category_id, Category.all.collect {|p| [
p.name,
p.id ] }, { :include_blank => true } %>
</p>
<p>
<%= f.label :name %><%= mark_required(@article, :name) %><br/>
<%= f.text_field :name %>
</p>
<p>
<%= f.label :preview %><%= mark_required(@article, :preview) %><br/>
<%= f.text_area :preview, :size => "70x6" %>
</p>
<p>
<%= f.label :body %><%= mark_required(@article, :body) %><br/>
<%= f.text_area :body, :class => "mceEditor", :size => "100x20" %>
</p>
<% if admin? %>
<p>
<%= f.label :publish_on_main %>
<%= f.check_box :publish_on_main %>
</p>
<% end %>
<%= f.submit %>
<% end %>
<div style="margin-top: 10px;">
<iframe src="<%= images_path %>" width="90%" height="500" name="imagesIframe"></iframe>
</div>