jQuery Validation 1.9 for twitter bootstrap 2.1

validation.js

jQuery.validator.setDefaults({ 
  validClass: "success",
  errorElement: "span",
  errorPlacement: function(error, element){
                 	$(error).addClass('help-block').insertAfter(element);
                  },
  highlight: function(element, errorClass, validClass) {
                        $(element).parents('div.control-group').addClass(errorClass).removeClass(validClass);
                  },
  unhighlight: function(element, errorClass, validClass) {
     			$(element).parents('div.control-group').removeClass(errorClass).addClass(validClass);
                  }
});