my oldest javascript i could find

gistfile1.html

<script>

var Vpos = document.body.clientHeight - 100;
function Video(){
Vpos = Vpos - 10;
document.all.EF.style.top = Vpos;
if (Vpos < -100){
Vpos = document.body.clientHeight -100;
document.all.EF.style.top = -100;
window.clearInterval(VEF);
window.setTimeout('StartVideo()', Math.random()*10000);
}
}

function StartVideo(){
VEF = window.setInterval('Video()',10);
}

window.setTimeout('StartVideo()', Math.random()*10000);

</script>