if (!document.getElementById && document.all) document.getElementById = document.all;
function zmenBarvu()
{
  document.getElementById('okno').style.height = '430px';
}

if (!document.getElementById && document.all) document.getElementById = document.all;
function zmenBarvu02()
{
  document.getElementById('okno').style.height = '262px';
}

if (!document.getElementById && document.all) document.getElementById = document.all;
function zmenBarvu03()
{
  document.getElementById('okno').style.height = '656px';
}

if (!document.getElementById && document.all) document.getElementById = document.all;
function zmenBarvu04()
{
  document.getElementById('okno').style.height = '816px';
}

if (!document.getElementById && document.all) document.getElementById = document.all;
function zmenBarvu05()
{
  document.getElementById('okno').style.height = '992px';
}


if (screen.height <= 600) {
zmenBarvu02();
}

if (screen.height == 768) {
zmenBarvu();
}

if (screen.height == 864) {
zmenBarvu03();
}

if (screen.height == 1024) {
zmenBarvu04();
}

if (screen.height >= 1200) {
zmenBarvu05();
}