Redmine/app/views/projects/settings/_wiki.html.erb

<%= labelled_form_for @wiki,
                   :as => :wiki,
                   :url => { :controller => 'wikis', :action => 'edit', :id => @project },
                   :remote => true, :method => 'post' do |f| %>

<%= error_messages_for 'wiki' %>

<div class="box tabular">
<p><%= f.text_field :start_page, :size => 60, :required => true %>
<em class="info"><%= l(:text_unallowed_characters) %>: , . / ? ; : |</em></p>
</div>

<div class="contextual">
<%= link_to(l(:button_delete), {:controller => 'wikis', :action => 'destroy', :id => @project},
            :class => 'icon icon-del') if @wiki && !@wiki.new_record? %>
</div>

<%= submit_tag((@wiki.nil? || @wiki.new_record?) ? l(:button_create) : l(:button_save)) %>
<% end %>