validate remote jquery code example

Example: jquery validator remote

$( "#myform" ).validate({

  rules: {

    email: {

      required: true,

      email: true,

      remote: {

        url: "check-email.php",

        type: "post",

        data: {

          username: function() {

            return $( "#username" ).val();

          }

        }

      }

    }

  }

});