Rails - Aug 2005 - GMail style loading pages using iframes, rails and prototype

Can any one spoon feed me with a simple method to have GMail style
loading pages using iframes (or divs)?

<%= link_to_remote( "load me",
           :update => "main",
           :url  => {:action => "load", :id  => 1},
           :loading  => "help me",
           :complete => "help me",
           :condition => "") %>

Thanks.

Regards,
Leon Leslie.