Drseče odpiranje in zapiranje okna

<script type="text/javascript">
sirina = screen.width; // Visina okna
visina = screen.height; // Sirina okna
x=100
i=visina

function dol()
{
x += 5;
self.moveTo(0,0)
self.resizeTo (sirina,x);
if(x < visina) setTimeout("dol()",10);
}

function gor()
{
i -= 5;
self.moveTo(0,0)
self.resizeTo (sirina,i);
if(i > 100) setTimeout("gor()",10);
}
</script>

<p onclick="dol()">Zarolaj dol</p>
<p onclick="gor()">Zarolaj gor</p>