jQuery POST执行两次

Question

我有一个注册表，我为检查数据库中的电子邮件是否存在提供了一些条件，但是当我用现有的电子邮件创建一个新帐户时，它会返回1，即（电子邮件已存在）并且还可以，但是当我创建一个新帐户时收到新的电子邮件后，它会再次返回1 ..，并且应该返回我-> 4，用于（成功创建帐户）请参见下面的代码：

 $('#acord').on('change', function(){
   this.value = this.checked ? 1 : 0;
 $("#formreg").submit(function(event) {
  event.preventDefault();
  $(".inreg").html('<i class="fa fa-spinner fa-pulse"></i> Verificam informatiile..');
  var $form = $(this),
    acord  = $form.find("[type='checkbox'][name=acord]").val(),
    nume   = $form.find("[type='text'][name=nume]").val(),
    email  = $form.find("[type='email'][name='email']").val(),
    parola = $form.find("[type='password'][name='parola']").val(),
    varsta = $form.find("[type='text'][name='varsta']").val(),
    url = 'inc/sql/register-user.php';
  setTimeout(function() {
    var posting = $.post(url, {
      nume:   nume,
      email:  email,
      parola: parola,
      varsta: varsta,
      acord:  acord
    });
    posting.done(function(data) {
      if (data == 1) {
        swal({
          title: "Adresa de mail exista",
          text: "Adresa de email "+email+" este deja folosita.",
          type: "error",
          timer: 4000,
          showConfirmButton: false
        });
        $(".inreg").html('INREGISTREAZA-TE');
      } else if (data == 2) {
        swal({
          title: "Ups!",
          text: "Adresa de email nu este valida.",
          type: "error",
          timer: 4000,
          showConfirmButton: false
        });
        $(".inreg").html('INREGISTREAZA-TE');
      } else if (data == 3) {
        swal({
          title: "Ups!",
          text: "Parola prea lunga, trebuie sa contina intre 5 si 10 caractere. ",
          type: "error",
          timer: 4000,
          showConfirmButton: false
        });
        $(".inreg").html('INREGISTREAZA-TE');
      } else if (data == 4) {
        swal({
          title: "Felicitari! " + nume + "",
          text: "Contul a fost inregistrat in baza noastra de date. Nu uitati sa adaugati momentele. Va dorim mult succes!",
          type: "success",
          timer: 2100,
          showConfirmButton: false
        });
        $(".inreg").html('<i class="fa fa-spinner fa-pulse"></i> Va logam automat in cont..');
        setTimeout(function() {window.location.href = "?p=contul-meu";}, 3000);
      } else if (data == 5) {
        swal({
          title: "Termeni si conditii neacceptate!",
          text: "Ne pare rau, dar ca sa te poti inregistra pe aceasta platforma trebuie sa fi de acord cu termenii si conditiile noastre!",
          type: "warning",
          timer: 4300,
          showConfirmButton: false
        });
       }
       $(".inreg").html('INREGISTREAZA-TE');
    })
  }, 3000);

});
}).change();

Answer 1

$('#acord').on('change', function(){
   this.value = this.checked ? 1 : 0;
 $("#formreg").submit(function(event) {