Responsive tables (add cell description -- data attribute)
function pridatPopisky(el) {
var popisky = el.getElementsByTagName("th");
var radky = el.getElementsByTagName("tr");
for (var i = 1; i < radky.length; i++) {
var bunky = radky[i].getElementsByTagName("td");
for (var j = 0; j < bunky.length; j++) {
bunky[j].setAttribute("popisek", $(popisky[j]).html());
}
}
}