function start()
    {
        var tresc_diva = "";

        for(i = 0; i<=34; i++)
        {
            var element = "lit" +i;

            tresc_diva = tresc_diva + '<div class = "litera" onclick = "check('+i+')" id = "'+element+'">'+litery[i]+'</div>'
            if((i+1)%7 ==0) tresc_diva = tresc_diva + '<div style = "clear:both;"></div>'
        }

        document.getElementById("alfabet").innerHTML = tresc_diva;


        wypisz_haslo();
    }

    function check(nr)
    {
        alert(nr);
    }