function UnCheck(ide){
  if(document.getElementById(ide)){
    if(document.getElementById(ide).checked) document.getElementById(ide).checked = false;
    else document.getElementById(ide).checked = true;
  }
}
function ZavriBannerHomePageBig(ide){
  if(document.getElementById(ide)){
    document.getElementById(ide).style.visibility = 'hidden';
  }
}
function BannerHomePageBig(){
  var sirkaM = screen.availWidth;
  var sirkaB = document.getElementById('banner_home_page_big').offsetWidth;
  var zleva = Math.round((sirkaM - sirkaB) / 2);
  document.getElementById('banner_home_page_big').style.marginLeft = zleva+"px";
}