function loadImage(imageURL, callback) {
  var imageURL = proxify( imageURL );

  window.gif = window.img = null

  if (imageURL.substr(-3) === "gif") {
    window.gif = GIF(imageURL);
    // gif.on("error", tryToLoadNextImage);
    // gif.on("rendered", trackLoadTime);
    gif.on("rendered", callback);
    return gif.render();
  } else {
    window.img = new Image();
    // img.addEventListener("error", tryToLoadNextImage);
    img.addEventListener("load", callback);
    img.crossOrigin = "anonymous";
    return img.src = imageURL;
  }
}

function giveImage(t) {
  if (window.gif) {
    return gif.frames[gif.currentFrame(t)];
  } else {
    return img;
  }
}

function proxify (url) {
  if (url.indexOf("http") == 0)
    return "/cgi-bin/proxy?" + url // .replace(/^https?:\/\//, "");
  else
    return url
}

function filesize(n) {
  if (n < 1e3) return n + " bytes"
  if (n < 1e6) return decimalString(n/1e3) + " kb"
  if (n < 1e9) return decimalString(n/1e6) + " mb"
  return "WAY TOO BIG DUDE"
}
function decimalString(n){
  var m = Math.floor(n);
  return m + "." + Math.round((n-m)*10)
}