var timers = new Object();

function autoscroll(objid, spd) {
	var obj = document.getElementById(objid);

	if (obj != null) {
		obj.scrollTop += spd;
	}
}

function scroll(objid, spd) {
	if (!timers[objid]) {
		timers[objid] = new Object();
		timers[objid]['on'] = false;
	}

	if (timers[objid]['on'] || spd == 0) {
		timers[objid]['on'] = false;
		clearInterval(timers[objid]['timer']);
	} else {
		timers[objid]['on'] = true;

		var str = "autoscroll('" + objid + "'," + (spd * 3) + ")";
		timers[objid]['timer'] = setInterval(str, 10);
	}
}