Rails - Mar 2006 - css, div-tags and ajax

Hi.

I copied parts of the ajax-examples in Agile Rails prog. and modified
it so it searched for zip-codes. The result is displayed in
search.rhtml. The first version looked like this, I liked the look of
the "add to cart" in the depot-example. :class =>
''button1'' is
originally addtocart which I renamed in the .css-file.

<% for city in @cities %>
  <%= link_to (city.postalcode,
                           :action => ''observer'',
                           :class => ''button1'') %>
  <%=h city.name %>
<% end %>

Fairly trivial.  When I wanted to "ajax-ify" link_to I wrote:

<% for city in @cities %>
  <%= link_to_remote (city.postalcode,
                                        :update =>
''p_search'',
                                        :url => {:action =>
''observer''},
                                        :class =>
''button1'') %>
  <%=h city.name %>
<% end %>

Now this nice css-button1 looks like a plain href. How can I retain
the css-created look?

regards
Claus