_form.rhtml

ajax在ruby中的应用

<% if (@username) %>
Sorry, <%= @username %> is not right.
<br>
<% end %>
<%= form_remote_tag(:update => 'displayDiv',
  :url => {:action => :login} ) %>
  Please log in:
  <%= text_field_tag :username %>
  <%= submit_tag "Submit" %>
<%= end_form_tag %>