redmine/app/views/groups/_users.html.erb

<div class="splitcontentleft">
<% if @group.users.any? %>
  <table class="list users">
    <thead><tr>
      <th><%= l(:label_user) %></th>
      <th style="width:15%"></th>
    </tr></thead>
    <tbody>
    <% @group.users.sort.each do |user| %>
      <tr id="user-<%= user.id %>" class="<%= cycle 'odd', 'even' %>">
        <td class="user"><%= link_to_user user %></td>
        <td class="buttons">
            <%= link_to_remote(
                  l(:button_delete),
                  { :url => group_user_path(@group, :user_id => user),
                    :method => :delete },
                  :class => 'icon icon-del'
                ) %>
        </td>
      </tr>
    <% end %>
    </tbody>
  </table>
<% else %>
  <p class="nodata"><%= l(:label_no_data) %></p>
<% end %>
</div>

<div class="splitcontentright">
<% users = User.active.not_in_group(@group).all(:limit => 100) %>
<% if users.any? %>
  <%= form_for(@group, :remote => true, :url => group_users_path(@group),
               :html => {:method => :post}) do |f| %>
    <fieldset><legend><%=l(:label_user_new)%></legend>

    <p><%= label_tag "user_search", l(:label_user_search) %><%= text_field_tag 'user_search', nil %></p>
    <%= observe_field(:user_search,
                 :frequency => 0.5,
                 :update => :users,
                 :url => autocomplete_for_user_group_path(@group),
                 :method => :get,
                 :before => '$("user_search").addClassName("ajax-loading")',
                 :complete => '$("user_search").removeClassName("ajax-loading")',
                 :with => 'q')
                  %>

    <div id="users">
      <%= principals_check_box_tags 'user_ids[]', users %>
    </div>

    <p><%= submit_tag l(:button_add) %></p>
    </fieldset>
  <% end %>
<% end %>

</div>