Prompt avec 2 input fields

Enfin j'ai trouvé une astuce en utilisant les modals en Bootstrap

<div class="modal fade" id="myModal" tabindex="-1" role="dialog" aria labelledby="myModalLabel" aria-hidden="true">
<div class="modal-dialog">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal"><span aria-hidden="true">X</span><span class="sr-only"></span></button>
<h4 class="modal-title" id="myModalLabel">Identifiant</h4>
</div>
<div class="modal-body">

<form action="../compte.php" method="post">
<input type="text" class="form-control" name="id_c" placeholder="ton id ici">
<span class="input-group-btn">
<hr></hr>
<input class="btn btn-default" type="submit" value="Envoyer">
</span>

</form>
..