// JavaScript Document

var accelerate = 0;
var y=0;
var isRunning;
function move_scroller_to(y) {document.getElementById('scroller').style.top=y+'px'; }


function down() {
y = y - 2;
move_scroller_to(y);
 isRunning = setTimeout('down();', 1); }

function up() {
y = y + 2;
if (y>0) y=0;
move_scroller_to(y);
 isRunning = setTimeout('up();', 1); }


 
function stopscroll() { if (isRunning) {clearTimeout(isRunning); }}