function settextobj(obj, text) {
    if(document.all)
        obj.innerText = text;
    else
        obj.textContent = text;
}

function gettextobj(obj) {
    if(document.all)
        return obj.innerText;
    else
        return obj.textContent;
}

// unfold Q&A
function onFoldQA(index)
{
    var box = document.getElementById('answersBox' + index);
    var button = document.getElementById('labelFold' + index);
    if (box == undefined || button == undefined) return;
    
    if (box.style.display == 'none')
    {
        box.style.display = '';
        settextobj(button, '<< ukryj odpowiedź');
    }
    else
    {
        box.style.display = 'none';
        settextobj(button, 'zobacz odpowiedź >>');
    }
}