Post Ajax Jquery

post ajax

  $.ajax({
            type: "POST",
            url: "/NewEmail",
            data: { username: username }
          }).done(function(data){
            if(data.success == false){
                 var errores = '';
                      for(datos in data.errors){
                          errores += '<small >' + data.errors[datos] + '</small>';
                      }
                $('#danger').fadeIn("fast").html(errores);
              }else{
    
            }

          });