function debug(num) {
  var i = num;
  var rez = document.getElementById("debug"+i);
  if (!rez) {
    i = 0;
    rez = document.getElementById("debug"+i);
  }
  rez.style.display = "none";
  i++;
  rez = document.getElementById("debug"+i);
  if (!rez) rez = document.getElementById("debug0");
  rez.style.display = "block";
//  rez.onclick = debug(i);
}

function fun_focus(id) {
  if (id.value == id.alt) id.value = "";
}

function fun_blur(id) {
  if (id.value == "") id.value = id.alt;
}