$('#ajax-modal').html('<%= escape_javascript(render(:partial => 'watchers/new', :locals => {:watchables => @watchables, :users => @users})) %>');

<% if @watchables.size == 1 %>
$('#watchers').html('<%= escape_javascript(render(:partial => 'watchers/watchers', :locals => {:watched => @watchables.first})) %>');
<% end %>