Redmine/app/views/timelog/_date_range.html.erb

<fieldset id="date-range" class="collapsible">
<legend onclick="toggleFieldset(this);"><%= l(:label_date_range) %></legend>
<div>
<p>
<%= label_tag "period_type_list", l(:description_date_range_list), :class => "hidden-for-sighted" %>
<%= radio_button_tag 'period_type', '1', !@free_period, :onclick => '$("#from,#to").attr("disabled", true);$("#period").removeAttr("disabled");', :id => "period_type_list"%>
<%= select_tag 'period', options_for_period_select(params[:period]),
                         :onchange => 'this.form.submit();',
                         :onfocus => '$("#period_type_1").attr("checked", true);',
                         :disabled => @free_period %>
</p>
<p>
<%= label_tag "period_type_interval", l(:description_date_range_interval), :class => "hidden-for-sighted" %>
<%= radio_button_tag 'period_type', '2', @free_period, :onclick => '$("#from,#to").removeAttr("disabled");$("#period").attr("disabled", true);', :id => "period_type_interval" %>
<%= l(:label_date_from_to,
        :start => ((label_tag "from", l(:description_date_from), :class => "hidden-for-sighted") + 
            text_field_tag('from', @from, :size => 10, :disabled => !@free_period) + calendar_for('from')),
        :end => ((label_tag "to", l(:description_date_to), :class => "hidden-for-sighted") +
            text_field_tag('to', @to, :size => 10, :disabled => !@free_period) + calendar_for('to'))).html_safe %>
</p>
</div>
</fieldset>
<p class="buttons">
  <%= link_to_function l(:button_apply), '$("#query_form").submit()', :class => 'icon icon-checked' %>
  <%= link_to l(:button_clear), {:controller => controller_name, :action => action_name, :project_id => @project, :issue_id => @issue}, :class => 'icon icon-reload' %>
</p>

<div class="tabs">
<% url_params = @free_period ? { :from => @from, :to => @to } : { :period => params[:period] } %>
<ul>
    <li><%= link_to(l(:label_details), url_params.merge({:controller => 'timelog', :action => 'index', :project_id => @project, :issue_id => @issue }),
                                       :class => (action_name == 'index' ? 'selected' : nil)) %></li>
    <li><%= link_to(l(:label_report), url_params.merge({:controller => 'timelog', :action => 'report', :project_id => @project, :issue_id => @issue}),
                                       :class => (action_name == 'report' ? 'selected' : nil)) %></li>
</ul>
</div>

<%= javascript_tag do %>
$('#from, #to').change(function(){
  $('#period_type_interval').attr('checked', true); $('#from,#to').removeAttr('disabled'); $('#period').attr('disabled', true);
});
<% end %>