ChangeSplash();

var content = GetRef("Content");
var contentIndex = 0;
function ChangeBannerImage() {    
    if (content) {
        //var index = Math.floor(Math.random()*3) + 1;
        content.style.backgroundImage = "url(Images/banner"+((contentIndex%4)+1)+".jpg)";
        contentIndex++;
        //background: url(Images/banner.png)
    }
}

ChangeBannerImage();

if (content) {
    setInterval(ChangeBannerImage, 5000);
}