function changeDiv()
{
    actSmer = Math.ceil(Math.random()*6)
    
    document.getElementById('uvodDiv1').style.display = 'none';
    document.getElementById('uvodDiv2').style.display = 'none';
    document.getElementById('uvodDiv3').style.display = 'none';
    document.getElementById('uvodDiv4').style.display = 'none';
    document.getElementById('uvodDiv5').style.display = 'none';
    document.getElementById('uvodDiv6').style.display = 'none';
    
    strSmer = 'uvodDiv' + actSmer;
    
    document.getElementById(strSmer).style.display = 'block';
}

function initTimerUvod()
{
    changeDiv();

    setTimeout("initTimerUvod()", 10 * 200);
}