;(function($) { 
   $(function(){ 
      $("input#hide").click(function () {
          var filter1 = document.form1.select1.value;
          $("ul#members>li").show();
          if (filter1 != null) {
              $("ul#members>li:not(." + filter1 + ")").hide();
          }
      });
      $("input#showall").click(function () {
          $("ul#members>li").show();
      });
   }); 
})(jQuery);