openproject/app/views/attachments/_form.html.erb

<%#-- copyright
OpenProject is a project management system.
Copyright (C) 2012-2015 the OpenProject Foundation (OPF)

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License version 3.

OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
Copyright (C) 2006-2013 Jean-Philippe Lang
Copyright (C) 2010-2013 the ChiliProject Team

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

See doc/COPYRIGHT.rdoc for more details.

++#%>

<div id="attachments_fields">
  <div id="attachment_template" class="attachment_field">
    <%= file_field_tag 'attachments[1][file]', :size => 15, :id => nil, :class => "attachment_choose_file"  -%>
    <label class="label-with-input" >
      <%= l(:label_optional_description) %>
      <%= text_field_tag 'attachments[1][description]', '', :size => 38, :id => nil %>
    </label>
  </div>
</div>
<br />
<span class="add_another_file">
  <%= link_to l(:label_add_another_file), '#', :onclick => 'addFileField(); return false;' %>
  (<%= l(:label_max_size) %>: <%= number_to_human_size(Setting.attachment_max_size.to_i.kilobytes) %>)
</span>