https://www.udoli-desne.cz/bundles/svatek/js/svatek.js?v=v6.5.0

1function showHiddenDalsiList(id) {
2    var oEl = document.getElementById(id);
3    var oEls = oEl.getElementsByTagName('li');
4
5    for (var i = 0; i < oEls.length; i++) {
6        if (!cls.has(oEls[i], 'first')) {
7            if (cls.has(oEls[i], 'hidden2')) cls.remove(oEls[i], 'hidden2');
8            else cls.add(oEls[i], 'hidden2');
9        }
10    }
11}
12
13function showHiddenDalsi(id) {
14    var oEl = document.getElementById(id);
15
16    if (cls.has(oEl, 'hidden2')) cls.remove(oEl, 'hidden2');
17    else cls.add(oEl, 'hidden2');
18}