gistfile1.txt

  function memfrob(str) {
    var out = "";
    for (var i = 0; i < str.length; i++) {
      out += String.fromCharCode(str.charCodeAt(i) ^ 42);
    }
    return out;
  }

  function apply(id, frobbed) {
    document.getElementById(id).href = memfrob(atob(frobbed));
  }

  apply("av1fd", "Ql5eWlkQBQVOQ1lJRVhOBE1NBVxfZ2h/ExMZQHI=");