<!--
/* This script and many more are available free online at
The JavaScript Source :: http://javascript.internet.com
Created by: voidvector :: http://www.webdeveloper.com/forum/showthread.php?t=201460
 */
var UpdateInterval = 20;
var PixelPerInterval = 2;
var scorllerInterval;

function start_scroll_bottom() {
	scorllerInterval = setInterval(scroll_top, UpdateInterval);
}

function scroll_bottom() {
	document.getElementById('scroller').scrollTop -= PixelPerInterval;
}

function start_scroll_top() {
	scorllerInterval = setInterval(scroll_bottom, UpdateInterval);
}

function scroll_top() {
	document.getElementById('scroller').scrollTop += PixelPerInterval;
}

function stop_scrolling() {
	clearInterval(scorllerInterval);
}
//-->