$(function() {
 $("#postcodecheck").getZip("/aspx/get.aspx?xdl=/views/internet/xdl/ajax/getzip&xsl=/views/internet/xsl/ajax/getzip&content=xml");
});

(function($){
 /*
  Retrieve zip info
  */
  $.fn.getZip = function(url) {
    var container = $(this);

    $.ajax({
      url: url,
      type: 'GET',
      dataType: 'xml',
      success: function(data) {
        // container.append(data);
        var gegevens = $(data).find("gegevens");
        var postcode = gegevens.attr("postcode");
        var huisnummer = gegevens.attr("huisnummer");
        
        if (postcode) {
          container.find("input[class=postcode]").attr("value", postcode);
          container.find("input[class=huisnummer]").attr("value", huisnummer);
        }
      },
      error: function() {
        // alert("error");
      }
    });
    return $(this);
  };
})(jQuery);