<a href="#" onclick="$('body_toggle').toggle();
	$('sidebar_toggle').toggle();">Toggle</a>
<span id="body_toggle">
<p>
  <%= f.label :body %><br />
  <%= f.text_area :body, :class => 'rich_text_editor', :rows => 17, :cols => 74 %>
</p>
</span>
<span id ="sidebar_toggle">
<p>
  <%= f.label :sidebar %><br />
  <%= f.text_area :sidebar, :class => 'rich_text_editor', :rows => 7, :cols => 74 %>
</p>
</span>