/**
 * zobrazi div s prislusnou cenou
 */
function changePrice(produkt_id, size_id, arr_size_id, tag_id)
{

  var css_display;
  for (var i = 0; i < arr_size_id.length; i++) {
    if (arr_size_id[i] != size_id) {
      css_display = 'none';
    } else {
      css_display = '';
    }

    var price = document.getElementById(tag_id + '-bezna-cena-' + arr_size_id[i]);
    price.style.display = css_display;

    var our_nt = document.getElementById(tag_id + '-cena-bez-dph-' + arr_size_id[i]);
    our_nt.style.display = css_display;

    var our = document.getElementById(tag_id + '-cena-s-dph-' + arr_size_id[i]);
    our.style.display = css_display;
  }
}

function hideContent(tag, class_name) {
  var content = document.getElementsByTagName(tag);
  for (var i = 0; i < content.length; i++) {
    if (content[i].className == class_name) {
      content[i].style.display = 'none';
    }
  }
}