redmine/app/views/queries/_filters.rhtml

<script type="text/javascript">
//<![CDATA[
function add_filter() {
    select = $('add_filter_select');
    field = select.value
    Element.show('tr_' +  field);
    check_box = $('cb_' + field);
    check_box.checked = true;
    toggle_filter(field);
    select.selectedIndex = 0;
    
    for (i=0; i<select.options.length; i++) {
        if (select.options[i].value == field) {
            select.options[i].disabled = true;
        }    
    }
}

function toggle_filter(field) {
    check_box = $('cb_' + field);
    
    if (check_box.checked) {
        Element.show("operators_" + field);
        toggle_operator(field);
    } else {
        Element.hide("operators_" + field);
        Element.hide("div_values_" + field);
  }
}

function toggle_operator(field) {
  operator = $("operators_" + field);
  switch (operator.value) {
    case "!*":
    case "*":
    case "t":
    case "w":
    case "o":
    case "c":
      Element.hide("div_values_" + field);
      break;
    default:
      Element.show("div_values_" + field);
      break;
  }
}

function toggle_multi_select(field) {
    select = $('values_' + field);
    if (select.multiple == true) {
        select.multiple = false;
    } else {
        select.multiple = true;
    }
}
//]]>
</script>

<table width="100%">
<tr>
<td>
<table>
<% query.available_filters.sort{|a,b| a[1][:order]<=>b[1][:order]}.each do |filter| %>
    <% field = filter[0]
       options = filter[1] %>
    <tr <%= 'style="display:none;"' unless query.has_filter?(field) %> id="tr_<%= field %>" class="filter">
    <td style="width:200px;">
        <%= check_box_tag 'fields[]', field, query.has_filter?(field), :onclick => "toggle_filter('#{field}');", :id => "cb_#{field}" %>
        <label for="cb_<%= field %>"><%= filter[1][:name] || l(("field_"+field.to_s.gsub(/\_id$/, "")).to_sym) %></label>
    </td>
    <td style="width:150px;">
        <%= select_tag "operators[#{field}]", options_for_select(operators_for_select(options[:type]), query.operator_for(field)), :id => "operators_#{field}", :onchange => "toggle_operator('#{field}');", :class => "select-small", :style => "vertical-align: top;" %>
    </td>
    <td>    
    <div id="div_values_<%= field %>" style="display:none;">
    <% case options[:type]
    when :list, :list_optional, :list_status, :list_subprojects %>
        <select <%= "multiple=true" if query.values_for(field) and query.values_for(field).length > 1 %> name="values[<%= field %>][]" id="values_<%= field %>" class="select-small" style="vertical-align: top;">
        <%= options_for_select options[:values], query.values_for(field) %>        
        </select>
        <%= link_to_function image_tag('bullet_toggle_plus.png'), "toggle_multi_select('#{field}');", :style => "vertical-align: bottom;" %>
    <% when :date, :date_past %>
        <%= text_field_tag "values[#{field}][]", query.values_for(field), :id => "values_#{field}", :size => 3, :class => "select-small" %> <%= l(:label_day_plural) %>
    <% when :string, :text %>
        <%= text_field_tag "values[#{field}][]", query.values_for(field), :id => "values_#{field}", :size => 30, :class => "select-small" %>
    <% when :integer %>
        <%= text_field_tag "values[#{field}][]", query.values_for(field), :id => "values_#{field}", :size => 3, :class => "select-small" %>
    <% end %>
    </div>
    <script type="text/javascript">toggle_filter('<%= field %>');</script>
    </td>
    </tr>
<% end %>
</table>
</td>
<td class="add-filter">
<%= l(:label_filter_add) %>:
<%= select_tag 'add_filter_select', options_for_select([["",""]] + query.available_filters.sort{|a,b| a[1][:order]<=>b[1][:order]}.collect{|field| [ field[1][:name] || l(("field_"+field[0].to_s.gsub(/_id$/, "")).to_sym), field[0]] unless query.has_filter?(field[0])}.compact),
																		:onchange => "add_filter();",
																		:class => "select-small",
																		:name => nil %>
</td>
</tr>
</table>