Get dynamically loaded element id

My script contains three parts:

The first is the display page (ex: home.php) in it I include two other pages.

The second is a page that queries the database and displays the first 5 results (eg consult-1.php). This is displayed by default.

The third is another page that displays 5 more results from the last id listed in home.php (ex: consult-2.php) when the user requests this query, and each new request displays 5 results. / p>

The includes are made inside a div and to return results from the "consult-2.php" page I use the following:

    $(".minha-div:last").after(data); //Aonde "data" é o retorno de "consult-2.php"

The elements displayed both by the pre-load page "consult-1.php" and by the "consult-2.php" page have the return of their respective "ids" by examining with inspector I can see them clearly however in the script I need to get these ids in a "click" function with jquery.

The problem is exactly there, I can only get the "ids" of the results displayed by the "consult-1.php" page, the results of "consult-2.php" even though they are displayed and have "ids" and do not even want to be exibilos with a simple alert: (

I'm already grateful for any help!

HOME.PHP

<?php
  if(isset($_GET['last_msg_id'])){
      $last_msg_id = $_GET['last_msg_id'];
  }
  if(isset($_GET['action'])){
      $action=$_GET['action'];
  }else{ 
    $action = ''; 
  }

  if($action != "get"){
?>

   <div id="Minha-Div">

       <?php include('consult-1.php'); ?>

       <div id="last_msg_loader"></div>

       <?php 
         }else{
           include('consult-2.php');
           exit();
         }
       ?> 
   </div>

CONSULT-1.PHP

<?php
   $Busca = $pdo->query("SELECT * FROM minha-tabela ORDER By id DESC LIMIT 5");
   $Busca->execute();

   while($fetch = $Busca->fetch(PDO::FETCH_ASSOC)){

        $id =  $fetch['id'];
        $conteudo =  $fetch['conteudo'];

?>

<div id="<?php echo $id; ?>" class="message_box">

       <div><?php echo $conteudo; ?></div>

</div>

<?php 
   }// Fechamento do "while" !
?>

CONSULT-2.PHP

<?php
   $last_msg_id = $_GET['last_msg_id'];
   $Busca = $pdo->query("SELECT * FROM minha-tabela WHERE id < '$last_msg_id' ORDER By id DESC LIMIT 5");
   $Busca->execute();

   while($fetch = $Busca->fetch(PDO::FETCH_ASSOC)){

        $id =  $fetch['id'];
        $conteudo =  $fetch['conteudo'];

?>

<div id="<?php echo $id; ?>" class="message_box">

       <div><?php echo $conteudo; ?></div>

</div>

<?php 
   }// Fechamento do "while" !
?>

I use the scroll bar scroll to start the function that displays more items:

SCRIPT.JS

// Verifica scroll e chama função 
$(window).scroll(function(){
   if($(window).scrollTop() == $(document).height() - $(window).height()){
      last_msg_funtion();
   }
});
// Função que busca
function last_msg_funtion(){
    // Verifica se há conteúdo na tela...caso haja usamos "return"
    if($('#last_msg_loader img').length){
       //Isso evita duplicatas caso haja conteúdo carregado!
       return;
    }
    // salvamos o ultimo id da lista
    var ID = $(".message_box:last").attr("id");

    // Mostramos imagem de carregamento
    $('#last_msg_loader').html('<img src="load.gif">');
    // Enviamos o post (para esta mesma página)
    $.post("home.php?action=get&last_msg_id="+ID, function(data){
      // se a resposta não for vazia...
      if(data != ""){
          // Inserimos ela
          $(".message_box:last").after(data);     
      }
      // Limpamos o .gif
      $('#last_msg_loader').empty();

    });
};// Fechamos a função