<%= radio_button_tag 'period_type', '1', !@free_period, :onclick => 'Form.Element.disable("from");Form.Element.disable("to");Form.Element.enable("period");' %>
<%= select_tag 'period', options_for_period_select(params[:period]),
:onchange => 'this.form.submit();',
:onfocus => '$("period_type_1").checked = true;',
:disabled => @free_period %>
<%= radio_button_tag 'period_type', '2', @free_period, :onclick => 'Form.Element.enable("from");Form.Element.enable("to");Form.Element.disable("period");' %>
<%= l(:label_date_from_to, :start => (text_field_tag('from', @from, :size => 10, :disabled => !@free_period) + calendar_for('from')),
:end => (text_field_tag('to', @to, :size => 10, :disabled => !@free_period) + calendar_for('to'))) %>