Redmine/app/views/wiki/edit.rhtml

<div class="contextual">
<%= link_to(l(:label_page_index), {:action => 'special', :page => 'Page_index'}, :class => 'icon icon-index') %>
</div>

<h2><%= @page.pretty_title %></h2>

<% form_for :content, @content, :url => {:action => 'edit', :page => @page.title}, :html => {:id => 'wiki_form'} do |f| %>
<%= error_messages_for 'content' %>
<div class="contextual">
<%= l(:setting_text_formatting) %>:
<%= link_to l(:label_help), {:controller => 'help', :ctrl => 'wiki', :page => 'syntax' },
                            :onclick => "window.open('#{ url_for :controller => 'help', :ctrl => 'wiki', :page => 'syntax' }', '', 'resizable=yes, location=no, width=300, height=500, menubar=no, status=no, scrollbars=yes'); return false;" %>
</div>
<p><%= f.text_area :text, :cols => 100, :rows => 25, :class => 'wiki-edit' %></p>
<p><label><%= l(:field_comment) %></label><br /><%= f.text_field :comment, :size => 120 %></p>
<p><%= submit_tag l(:button_save) %>
   <%= link_to_remote l(:label_preview), 
                       { :url => { :controller => 'wiki', :action => 'preview', :id => @project },
                         :method => 'get',
                         :update => 'preview',
                         :with => "Form.serialize('wiki_form')",
                         :loading => "Element.show('indicator')",
                         :loaded => "Element.hide('indicator')"
                       } %>
   <span id="indicator" style="display:none"><%= image_tag "loading.gif", :align => "absmiddle" %></span>
</p>

<% end %>

<% if Setting.text_formatting == 'textile' %>
<%= javascript_include_tag 'jstoolbar' %>
<script type="text/javascript">
//<![CDATA[
if (document.getElementById) { 
	if (document.getElementById('content_text')) { 
		var commentTb = new jsToolBar(document.getElementById('content_text')); 
		commentTb.draw(); 
	}
}
//]]>
</script>
<% end %>

<div id="preview" class="wiki"></div>