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<%= form_tag({:controller => 'courses',
:action => 'join',
:object_id => course.id},
:remote => true,
:method => :post,
:id => 'new-watcher-form') do %>
<%= text_field_tag 'course_password', nil%>
<%= submit_tag '加入', :name => nil, :onclick => "hideModal(this);" %>
<%= submit_tag l(:button_cancel), :name => nil, :onclick => "hideModal(this);", :type => 'button' %>
<% end %>