function init()
{
haslo = document.getElementById('haslo_div').innerHTML;
document.getElementById('haslo_div').innerHTML = '';
document.getElementById('buttek0').innerHTML = '<button id="buttek" onclick="haslo_open()" style="width: 100%; height: 70px; font-size: 50px;"><img src="http://dl.dropbox.com/u/31162667/lock.png"></button>';
}
var haslo;
window.onload = init();

function haslo_open()
{
if (document.getElementById('buttek').innerHTML != '<img src="http://dl.dropbox.com/u/31162667/lock.png">')
{
document.getElementById('haslo_tresc').style.display = 'none';
document.getElementById('buttek').innerHTML = '<img src="http://dl.dropbox.com/u/31162667/lock.png">';
}
else
{
var password;
password=prompt(document.getElementById('haslo_pytanie').innerHTML ,' ');
if (password==haslo)
{
  if (document.getElementById('haslo_dobre')) alert(document.getElementById('haslo_dobre').innerHTML);
  document.getElementById('haslo_tresc').style.display = 'block';
  document.getElementById('buttek').innerHTML = '&#x21eb;';
}
else if (document.getElementById('haslo_zle')) alert(document.getElementById('haslo_zle').innerHTML);
}
}