Suppress enter in jquery datepicker textbox

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.11.4/jquery-ui.min.js"></script>
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.11.4/jquery-ui.min.css">
<p>Date: <input type="text" id="datepicker"></p>

JavaScript

$(document).ready(function(){
  $('#datepicker').bind('keydown',function(e){

    if (e.which == 13) //13 is Enter/Return key.
        e.stopImmediatePropagation();
  })
  .datepicker();
});