// jquery plugin for required input
(function($){
  $.fn.extend({
    require: function() {
      return this.each(function() {
        var t = $(this);
        var id = t.is('input:radio') ? t.attr('name') : t.attr('id');
        var label = $('label[for="'+id+'"]');
        if (label.children('.required').length == 0)
          label.append('<span class="required">*</span>');
      });
    }
  });
})(jQuery);