Bookmarklet to generate a random password

random-pass-bookmarklet.js

(function() {
  var url = 'https://www.random.org/passwords/?num=1&len=$1&format=plain&rnd=new', xhr = new XMLHttpRequest(), len, req, output;
  len = window.prompt('How many characters?', 15);
  url = url.replace('$1', len);
  xhr.onload = function() { prompt('Here\'s your password', this.responseText); };
  xhr.open('get', url, true);
  xhr.send();
}());