let w = 4;

function aktywuj(n){
  document.getElementById("k1").style.display="none";
  document.getElementById("k2").style.display="none";
  document.getElementById("k3").style.display="none";
  document.getElementById("k"+n).style.display="block";
}

function pasek(){
  w += 12;
  if(w>100) w=100;
  document.getElementById("pasek_in").style.width = w + "%";
}

function zatwierdz(){
  console.log(
    document.getElementById("imie").value,
    document.getElementById("naz").value,
    document.getElementById("uro").value,
    document.getElementById("ul").value,
    document.getElementById("num").value,
    document.getElementById("miasto").value,
    document.getElementById("tel").value,
    document.getElementById("rodo").checked
  );
}