Edit in JSFiddle

!function(){
	// Parameterized the widget
  $(document).ready(function () {  
    $("#Zone_Widget").MR_ParcelShopPicker({  
      Target: "#ParcelShopCode",
      Brand: "BDTEST  ",
      Country: "FR" 
    });  
  });
}();
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="fr" lang="fr" dir="ltr">
  <head>
    <title>Utilisation du Widget Mondial Relay</title>
    <!--jQuery-->  
    <script type="text/javascript" 
            src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js"></script>  
    <!-- Widget MR -->
    <script type="text/javascript"   
            src="https://widget.mondialrelay.com/parcelshop-picker/jquery.plugin.mondialrelay.parcelshoppicker.min.js"></script>    
  </head>
  <body>
    <!-- Widget -->
    <div id="Zone_Widget"></div>
    <!-- Parcelshop code -->
    <input type="hidden" id="ParcelShopCode" name="ParcelShopCode" />
  </body>
</html>