jquery - Send parameter to Bootstrap modal window?

Question

I have a problem, I cannot pass any parameters to a modal window (using Bootstrap 3), I tried using the solution stated in this link, but I cannot make it work:

Dynamically load information to Twitter Bootstrap modal

(Solution kexxcream user).

But pressing the button, the display does not show me anything, apparently blocks, attached a picture below:

http://i.imgur.com/uzRUyf1.png

I have attached the code (same code post above left);

HTML Code:

      <div id="myModal" class="modal hide fade">
      <div class="modal-header">
        <button class="close" data-dismiss="modal">&times;</button>
        <h3>Title</h3>
      </div>
      <div class="modal-body">            
          <div id="modalContent" style="display:none;">

          </div>
      </div>
      <div class="modal-footer">
        <a href="#" class="btn btn-info" data-dismiss="modal" >Close</a>
      </div>
  </div> 

JS Code:

    $("a[data-toggle=modal]").click(function() 
    {   
        var essay_id = $(this).attr('id');

        $.ajax({
            cache: false,
            type: 'POST',
            url: 'backend.php',
            data: 'EID='+essay_id,
            success: function(data) 
            {
                $('#myModal').show();
                $('#modalContent').show().html(data);
            }
        });
    });

Button:

<a href='#myModal' data-toggle='modal' id='2'> Edit </a>

PHP Code (backend.php):

<?php
$editId = $_POST['EID'];
?>
  <div class="jumbotron">
   <div class="container">
    <h1>The ID Selected is <?php echo $editId ?></h1>
   </div>
  </div>

Answer 1

There is a better solution than the accepted answer, specifically using data-* attributes. Setting the id to 1 will cause you issues if any other element on the page has id=1. Instead, you can do:

<button class="btn btn-primary" data-toggle="modal" data-target="#yourModalID" data-yourparameter="whateverYouWant">Load</button>

<script>
$('#yourModalID').on('show.bs.modal', function(e) {
  var yourparameter = e.relatedTarget.dataset.yourparameter;
  // Do some stuff w/ it.
});
</script>