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");
  switch (format.value) {
    case "list":
      Element.hide(p_length.parentNode);
      Element.hide(p_regexp.parentNode);
      Element.show(p_values);
      break;
    case "date":
    case "bool":
      Element.hide(p_length.parentNode);
      Element.hide(p_regexp.parentNode);
      Element.hide(p_values);
      break;
    default:
      Element.show(p_length.parentNode);
      Element.show(p_regexp.parentNode);
      Element.hide(p_values);
      break;
  }
}

function addValueField() {
    var f = $$('p#custom_field_possible_values span');
    p = document.getElementById("custom_field_possible_values");
    var v = f[0].cloneNode(true);
    v.childNodes[0].value = "";
    p.appendChild(v);
}

function deleteValueField(e) {
    var f = $$('p#custom_field_possible_values span');
    if (f.length == 1) {
        e.parentNode.childNodes[0].value = "";    
    } else {
        Element.remove(e.parentNode);
    }
}

//]]>
</script>

<!--[form:custom_field]-->
<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();" %></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"><label><%= l(:field_possible_values) %> <%= image_to_function "add.png", "addValueField();return false" %></label>
<% (@custom_field.possible_values.to_a + [""]).each do |value| %>
<span><%= text_field_tag 'custom_field[possible_values][]', value, :size => 30 %> <%= image_to_function "delete.png", "deleteValueField(this);return false" %><br /></span>
<% end %>

</p>
</div>
<%= javascript_tag "toggle_custom_field_format();" %>
<!--[eoform:custom_field]-->

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

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

<% end %>
</div>