<script language="javascript">
random.m=714025; random.a=4096; random.c=150889;
random.seed = (new Date()).getTime()%random.m;
function random()
{
random.seed = (random.seed*random.a + random.c) % random.m;
return random.seed / random.m;
}

function randomizeimages()
{
randomizeimage('image1', 3, 'tops/', '.png');
randomizeimage('image2', 3, 'middles/', '.png');
randomizeimage('image3', 3, 'bottoms/', '.png');
}

function randomizeimage(img, count, base, type)
{
document.images[img].src = base + Math.floor(random() * count + 1) + type
}
</script>