function ShowPopUpByTime(){
    //setTimeout("akce", milisekundy);
    setTimeout('ShowPopUp()', 1000);
}
function ShowPopUp() {
    document.getElementById('popup').style.visibility = "visible";
//
setInterval('SwapColor()', 500);
//
}

function SwapColor() {
//    if (document.getElementById('popupContent').style.color == 'red') {
//        document.getElementById('popupContent').style.color = 'black';
//    } else {
//        document.getElementById('popupContent').style.color = 'red';
//    }
    if (document.getElementById('popupContent').style.color == 'red') {
        document.getElementById('popupContent').style.color = 'black';
    } else {
        document.getElementById('popupContent').style.color = 'red';
    }

}


function HiddenPopUp(){
    document.getElementById('popup').style.visibility = "hidden";
    return true
}
function ShowPopUp(){
    document.getElementById('popup').style.visibility = "visible";
}



//