var t;

function scrollUp(n)
{
	scrollStop();
	p = document.getElementById(n);
	p.scrollTop += 3;
	
	t = setTimeout("scrollUp('"+n+"')",10);
}

function scrollDown(n)
{
	scrollStop();
	p = document.getElementById(n);
	p.scrollTop -= 3;
	
	t = setTimeout("scrollDown('"+n+"')",10);
}

function scrollStop()
{
	clearTimeout(t);
}

document.onmouseup = scrollStop;