gistfile1.js

$(function() {
  setInterval(function() {
    $(".reloadable").each(function(i) {
      var originalSrc = $(this).data('originalSrc');
      if (!originalSrc) {
        originalSrc = $(this).attr('src');
        $(this).data('originalSrc', originalSrc);
      }
      $(this).attr('src', originalSrc + '&hack=' + (new Date().getTime()));
    });
  }, 3000);
});