function swapGuide(showmedium,date,max,link) {
  $("#guidebody").fadeTo("fast", 0.1);
  $.ajax({
    type: "POST",
    url: link,
    data: {showmedium:showmedium,
           date:date,
           max:max,
           link:link},
    success: function(html){
               $("#guidebody").html(html);
               $("#guidebody").fadeTo("slow", 1.0);
             }
  });
}