$(function () {
  var d = new Date();
  var day = d.getDate();
  var month = d.getMonth() + 1; //months are zero based
  var year = d.getFullYear();
  var hour = d.getHours();
  var dateStamp = year + "_" + month + "_" + day + "_" + hour;

  $('#footer-nav-container').load('/navigation/footer.htm?d=' + dateStamp);
});