var sponce = false;

function toggleSpoiler(url) {
  if (!sponce) {
    sponce = true;
    var extension = url.substring(url.length-4,url.length).toLowerCase();
    switch (extension) {
    case ".txt":
      if (!getSpoiler(url)) { return true; }
      break;
    case ".png":
    case ".gif":
    case ".jpg":
      $("#spoiler").html("<img src=\"/" + url + "\" alt=\"Answer Key\" />");
      break;
    default:
      $("#spoiler").html("<a href=\"/" + url + "\">Go to Answer Key</a>");
      break;
    }
  }
  $("#spoiler").slideToggle("slow");
  return false;
}

function getSpoiler(url) {
  if (url.substring(1) != "/") { url = "/" + url; }
  $("#spoiler").load(url);
  return true;
}