Bookmarlet que insere boleto no Santander

boleto.js

(function() {
    'use strict';
    var codigoBarras = prompt().replace(/\D/g, '');
    var inputs = document
      .querySelector('frame[name="Principal"]')
      .contentWindow.document
      .querySelector('frame[name="Corpo"]')
      .contentWindow.document
      .querySelector('iframe#iframePrinc')
      .contentWindow.document
      .querySelectorAll('table.lista td input');

    var evt = document.createEvent("HTMLEvents");
    evt.initEvent("change", false, true);

    var start = 0;
    for (var i = 0; i < inputs.length; i++) {
      var input = inputs[i];
      var end = input.maxLength;
      input.value = codigoBarras.substr(start,end);
      input.dispatchEvent(evt);
      start = start + end;
    }
})();