function mungeEmail() {
  // [ord(char) * 2 + 17 for char in reversed(email)]
  var codes = [237, 219, 233, 233, 227, 235, 215,
               235, 109, 237, 227, 233, 239, 215];
  var result = "";
  for (var i = codes.length - 1; i >= 0; i--) {
    result += String.fromCharCode((codes[i] - 17) / 2);
  }
  document.getElementById("my_email").innerHTML = result + "@gmail.com";
}