function HideElements() {
    document.getElementById("event1").style.display = "none";
    document.getElementById("event2").style.display = "none";
}

var visibleElement = "event1";
function ShowElement(elementId) {
    document.getElementById(elementId).style.display = "block";
}

function ShowRandomEvent() {
    HideElements();

    
    var nbr = Math.round(Math.random() * 100);

    if ((nbr % 2) != 0) {
        visibleElement = "event2";
    }
    ShowElement(visibleElement);
}

function RotateEvent() {
    HideElements();
    if (visibleElement == "event1") {
        visibleElement = "event2";
    }
    else {
        visibleElement = "event1";
    }
    ShowElement(visibleElement);
}

function onLoadScript() {
    ShowRandomEvent();
    window.setInterval("RotateEvent()", 8000);
}
//window.onload = onLoadScript;