instiki/app/views/file/file.rhtml

<%
  @title = "Upload #{h @file_name}"
  @hide_navigation = false
%>

<%= error_messages_for 'file' %>

<% form_tag({ :controller => 'file', :web => @web_name, :action => 'file' }, 
        { 'multipart' => true , 'accept-charset' => 'utf-8' }) do %>
  <%= hidden_field 'file', 'file_name' %>
  <div class="inputFieldWithPrompt">
    <b>Content of <%= h @file_name %> to upload <small>(required)</small>:</b>
    <br/>
    <input type="file" name="file[content]" size="40" />
    <br/>
    <small>
    Please note that the file you are uploadng will be named <%= h @file_name %> on the wiki - 
    regardless of how it is named on your computer. To change the wiki name of the file, please go 
    <%= link_to :back %> and edit the wiki page that refers to the file.
    </small>
  </div>
  <div class="inputFieldWithPrompt">
    <b>Description <small>(optional)</small>:</b>
    <br/>
    <%= text_field "file", "description", "size" => 40 %>
  </div>
  <div>
    <input type="submit" value="Upload" /> as 
    <%= text_field_tag :author, @author, 
            :onfocus => "this.value == 'AnonymousCoward' ? this.value = '' : true;",
            :onblur  => "this.value == '' ? this.value = 'AnonymousCoward' : true" %>
  </div>
<% end %>