Submitting the form. How to make users submit a maximum of 2 times the form?

Question

JavaScript

There is such JS code (don't judge strictly, I don't know JS at all). It is necessary that when the form is resubmitted, a window pops up stating that it is impossible to submit the application again. And better after 2 shipments. This is necessary to prevent spam on the phone. Help please, I will be very grateful!)
JS code

// Первая форма

$(document).ready(function() {

 var form = $(".subform");

  form.submit(function() {
    var box = form.find('.message-box');
    $.ajax({
      type: "POST",
      url: "../php/mail.php",
      data: $(this).serialize()
    }).done(function() {
      box.show();
      setTimeout(function() {
        $.magnificPopup.close();
      }, 1000);
    });
    
    setTimeout(function(){
      box.show();
    },300);
    return false;
  });


});


// Вторая форма

$(document).ready(function() {

 var form = $(".subform2");


  form.submit(function() {
    var box = form.find('.message-box2');
    $.ajax({
      type: "POST",
      url: "../php/mail.php",
      data: $(this).serialize()
    }).done(function() {
      box.show();
      setTimeout(function() {
        $.magnificPopup.close();
      }, 1000);
    });
    
    setTimeout(function(){
      box.show();
    },300);
    return false;
  });

});


// Третья всплывающая форма

$(document).ready(function() {

    $(".popup").magnificPopup();

    //Цели для Яндекс.Метрики и Google Analytics
    $(".count_element").on("click", (function() {
        ga("send", "event", "goal", "goal");
        yaCounterXXXXXXXX.reachGoal("goal");
        return true;
    }));


    $("#form").submit(function() {
        $.ajax({
            type: "POST",
            url: "../php/mail.php",
            data: $(this).serialize()
        }).done(function() {
            alert("Спасибо за заявку!");
            setTimeout(function() {
                $.magnificPopup.close();
            }, 1000);
        });
        return false;
    });
    
});

Answer 1

look towards jquery.cookie