var timer_id;
function startScroll(frm,inc,dir) {
	if (timer_id) clearTimeout(timer_id);
	if (window.frames[frm])	{
		if (dir == "v") window.frames[frm].scrollBy(0, inc);
		else window.frames[frm].scrollBy(inc, 0);
		timer_id = setTimeout("startScroll('" + frm + "'," + inc + ",'" + dir + "')", 20);
	}
}

function stopScroll() {
	if (timer_id) clearTimeout(timer_id);
}