function show(id, parent)
{
        el = document.getElementById(id);
        if (el.style.display == 'none')
        {
                el.style.display = '';
                parent.innerHTML = '<br>Zwiń &lt;&lt;&lt;';
        } else {
                el.style.display = 'none';
                parent.innerHTML = 'Więcej &gt;&gt;&gt;';
        }
}