function showLoading()
{
    var loading = document.getElementById('reakcebg');
    loading.style.visibility = 'visible';
    loading.innerHTML = 'loading';
    loading.style.backgroundColor = 'GreenYellow';
}
                      
function showMessage(message, color, visible) {
    
    if (visible)
    {
        var loading = document.getElementById('reakcebg');
        loading.style.visibility = 'visible';
        loading.style.backgroundColor = color;
        loading.innerHTML = message;
        setTimeout("document.getElementById('reakcebg').style.visibility = 'hidden';", 5000);
    }
    else { document.getElementById('reakcebg').style.visibility = 'hidden'; }                               
}