Redmine/app/views/custom_fields/_form.rhtml

<%= error_messages_for 'custom_field' %>

<script type="text/javascript">
//<![CDATA[
function toggle_custom_field_format() {
  format = $("custom_field_field_format");
  p_length = $("custom_field_min_length");
  p_regexp = $("custom_field_regexp");
  p_values = $("custom_field_possible_values");
  p_searchable = $("custom_field_searchable");
  p_default = $("custom_field_default_value");
  
  p_default.setAttribute('type','text');
  Element.show(p_default.parentNode);
  
  switch (format.value) {
    case "list":
      Element.hide(p_length.parentNode);
      Element.hide(p_regexp.parentNode);
      if (p_searchable) Element.show(p_searchable.parentNode);
      Element.show(p_values);
      break;
    case "bool":
      p_default.setAttribute('type','checkbox');
      Element.hide(p_length.parentNode);
      Element.hide(p_regexp.parentNode);
      if (p_searchable) Element.hide(p_searchable.parentNode);
      Element.hide(p_values);
      break;
    case "date":
      Element.hide(p_length.parentNode);
      Element.hide(p_regexp.parentNode);
      if (p_searchable) Element.hide(p_searchable.parentNode);
      Element.hide(p_values);
      break;
    case "float":
    case "int":
      Element.show(p_length.parentNode);
      Element.show(p_regexp.parentNode);
      if (p_searchable) Element.hide(p_searchable.parentNode);
      Element.hide(p_values);
      break;
    default:
      Element.show(p_length.parentNode);
      Element.show(p_regexp.parentNode);
      if (p_searchable) Element.show(p_searchable.parentNode);
      Element.hide(p_values);
      break;
  }
}

//]]>
</script>

<div class="box">
<p><%= f.text_field :name, :required => true %></p>
<p><%= f.select :field_format, custom_field_formats_for_select, {}, :onchange => "toggle_custom_field_format();",
																																		:disabled => !@custom_field.new_record? %></p>
<p><label for="custom_field_min_length"><%=l(:label_min_max_length)%></label>
   <%= f.text_field :min_length, :size => 5, :no_label => true %> - 
   <%= f.text_field :max_length, :size => 5, :no_label => true %><br>(<%=l(:text_min_max_length_info)%>)</p>
<p><%= f.text_field :regexp, :size => 50 %><br>(<%=l(:text_regexp_info)%>)</p>
<p id="custom_field_possible_values"><%= f.text_area :possible_values, :value => @custom_field.possible_values.to_a.join("\n"),
																																			 :cols => 20,
																																			 :rows => 15 %>
<br /><em><%= l(:text_custom_field_possible_values_info) %></em></p>
<p><%= @custom_field.field_format == 'bool' ? f.check_box(:default_value) : f.text_field(:default_value) %></p>
</div>

<div class="box">
<% case @custom_field.class.name
when "IssueCustomField" %>
    
    <fieldset><legend><%=l(:label_tracker_plural)%></legend>
    <% for tracker in @trackers %>
        <%= check_box_tag "custom_field[tracker_ids][]", tracker.id, (@custom_field.trackers.include? tracker) %> <%= tracker.name %>
    <% end %>
		<%= hidden_field_tag "custom_field[tracker_ids][]", '' %>
    </fieldset>
    &nbsp;
    <p><%= f.check_box :is_required %></p>
    <p><%= f.check_box :is_for_all %></p>
    <p><%= f.check_box :is_filter %></p>
    <p><%= f.check_box :searchable %></p>
    
<% when "UserCustomField" %>
    <p><%= f.check_box :is_required %></p>
    <p><%= f.check_box :editable %></p>

<% when "ProjectCustomField" %>
    <p><%= f.check_box :is_required %></p>

<% when "TimeEntryCustomField" %>
    <p><%= f.check_box :is_required %></p>

<% end %>
</div>
<%= javascript_tag "toggle_custom_field_format();" %>