function imageSwap()
{
    var nextImage = 1;
    var totalImages = 5;
    
    for (var i = 0; i < totalImages; i++)
    {
        var img = new Image();
        img.src = "/images/header-0" + i + ".jpg";
    }
    
    function doFade()
    {
        var header = document.getElementById('header');
        if (document.all)
        {
            header.style.filter = "blendTrans(duration=2)";
            header.filters.blendTrans.Apply();
        }
        header.style.background = "url(/images/header-0" + nextImage + ".jpg)";
        if (document.all)
        {
            header.filters.blendTrans.Play();
        }
        nextImage = (nextImage + 1) % totalImages;

    }
    window.setInterval(doFade, 8000);
}