Rails - Mar 2006 - update a div element without having a corresponding action

Rails group,

I''m looking to update a div element with a page link without having  
to write a corresponding action to populate that element.

I''ve tried:
<%= link_to_function "cancel",
page.replace_html("control", :partial
=> "controls") %>

Basically I''m trying to limit the amount of methods that serve my  
Ajax calls that only render a partial.

Thanks,
Chris