function whatCorrector() {
  var replaces = 0;
  while (document.body.innerHTML.indexOf('#'+'KUKAC#')!=-1
         && replaces<10000) {
    document.body.innerHTML =
      document.body.innerHTML.replace(
        '#'+'KUKAC#',String.fromCharCode(64));
    replaces++;
  }
}

addEvent(window, 'load', whatCorrector);