var numImages = 5;

function imageSwitcher() {
    var elem = document.getElementById("splash");
    
    if (elem) {
        var imageNum = 0;

        while (imageNum < 1 || imageNum > numImages) {
            var currentDate = new Date();
            imageNum = currentDate.getSeconds() % (numImages + 1);
        }

        var imageName = "resources/images/splash0" + imageNum + ".jpg";

        var image = new Image();
        image.src = imageName;
        elem.src = image.src;
    }
}