function domyslna_wartosc(myField, event)
{
  if (myField.value == "" && event == "blur") myField.value = myField.defaultValue;
  if (myField.value == myField.defaultValue && event == "focus") myField.value = "";
}

function potwierdzenie() 
{
  name = confirm("Jesteś tego pewien?");
  return name;
}