if((pw = prompt('JsHacker 1.0 - Poziom: 4\nPodaj hasło:','')) == null) location.href = 'p3_mqt041.html';

  function f(v) {
    for(i = 0, r = ''; i < v.length; i++) with(Math)
      r += String.fromCharCode(v.charCodeAt(i) + ceil(sqrt(E.toString().charCodeAt(i))));
    return r;
  }

  if(f(pw) == 'rp9tuy' || pw == 'dyfuzor') {
    location.href = 'p5_'+pw+'.html';
  }
  else {
    alert('Hasło niepoprawne !!!   ');
    location.href = 'p3_mqt041.html';
  }