ScrollWidget is not working on Firefox, can someone help

[fifufifu]

var sw_interval;
var sw_x = 10;
var sw_dx = 0;
var sw_t = 10;
var sw_cursor = 1;


var sw_v;
var sw_w;
var sw_numItems;
var sw_first;
var sw_last;
var sw_clipRight;
var sw_ref;


function moveSWBlueBox(n)
{
if(sw_interval == null) {
if(n > 0) {
moveLeft(n*swItemsInSet);
}
else {
moveRight(-n*swItemsInSet);
}
var idx = getSWBlueBoxIdx();
var box;
box = document.getElementById("sw_box"+idx);
box.src = swWhiteBox;
pause(50);
idx += n;
if(idx < 1) {
idx = numSWBoxes + idx;
}
else if(idx > numSWBoxes) {
idx = idx - numSWBoxes;
}
box = document.getElementById("sw_box"+idx);
box.src = swBlueBox;
pause(50);
swBlueBoxIdx = idx;
}
}


function moveToSWBox(i)
{
if(sw_interval == null) {
var idx = getSWBlueBoxIdx();
var diff = i-idx;
if(diff != 0) {
moveSWBlueBox(diff);
}
}
}


function getSWBlueBoxIdx()
{
return swBlueBoxIdx;
}


function moveLeft(n)
{
if(sw_interval == null) {
var id = "widget_item"+sw_cursor;
sw_ref = document.getElementById(id);


// calibrate to sw_ref
var last_wi = sw_ref;
for(var i=sw_cursor+1; i<=sw_numItems; i++) {
id = "widget_item"+i;
wi = document.getElementById(id);
wi.style.left = (parseInt(last_wi.style.left) + sw_w) + "px";
last_wi = wi;
}
for(var i=1; i<sw_cursor; i++) {
id = "widget_item"+i;
wi = document.getElementById(id);
wi.style.left = (parseInt(last_wi.style.left) + sw_w) + "px";
last_wi = wi;
}


sw_cursor += n;
if(sw_cursor > sw_numItems) sw_cursor = 1;
sw_interval = setInterval("move("+(-1*n)+")",sw_t);
}
}


function moveRight(n)
{
if(sw_interval == null) {
var id = "widget_item"+sw_cursor;
sw_ref = document.getElementById(id);


// calibrate to sw_ref
var last_wi = sw_ref;
for(var i=sw_cursor-1; i>=1; i--) {
id = "widget_item"+i;
wi = document.getElementById(id);
wi.style.left = (parseInt(last_wi.style.left) - sw_w) + "px";
last_wi = wi;
}
for(var i=sw_numItems; i>=sw_cursor+swItemsInSet; i--) {
id = "widget_item"+i;
wi = document.getElementById(id);
wi.style.left = (parseInt(last_wi.style.left) - sw_w) + "px";
last_wi = wi;
}


sw_cursor -= n;
if(sw_cursor < 1) sw_cursor = sw_numItems + sw_cursor;
sw_interval = setInterval("move("+n+")",sw_t);
}
}


function move(n)
{
var id;
var wi;
var m = Math.abs(n*sw_w);
var f = 36;


sw_dx = Math.floor(f*Math.sin(sw_x*Math.PI/m));
if(sw_dx < 1) sw_dx = 1;
sw_x += sw_dx;


if(n<0) {
sw_dx *= -1;
if(parseInt(sw_ref.style.left) <= sw_w*n) {
clearInterval(sw_interval);
sw_interval = null;
sw_x = 10;
return;
}
}
else {
if(parseInt(sw_ref.style.left) >= sw_w*n) {
clearInterval(sw_interval);
sw_interval = null;
sw_x = 10;
return;
}
}


for(var i=1; i<=sw_numItems; i++) {
id = "widget_item"+i;
wi = document.getElementById(id);
wi.style.left = (parseInt(wi.style.left) + sw_dx) + "px";
display(wi);
}


}


function initScrollWidget()
{
var id;
var wi;


sw_v = document.getElementById("widget_items");
if(sw_v != null) {
sw_numItems = sw_v.childNodes.length;
sw_first = sw_v.firstChild;
sw_last = sw_v.lastChild;
sw_w = parseInt(getStyle(sw_first).width);
sw_clipRight = parseInt(getStyle(sw_first.parentNode).width);  // Assume clip at width of div.


for(var i=1; i<=sw_numItems; i++) {
id = "widget_item"+i;
wi = document.getElementById(id);
wi.style.left = (i-1)*sw_w + "px";
display(wi);
}
}


if(onloadScrollWidget) onloadScrollWidget();
}


function display(wi) {
// Display as needed to avoid window scroll bar.
if(parseInt(wi.style.left) < -sw_w || parseInt(wi.style.left) > sw_clipRight) {
wi.style.display = "none";
}
else {
wi.style.display = "block";
}
}


function getStyle(o){
var s;
if (o.currentStyle != null){
s = o.currentStyle;
} else{
s = document.defaultView.getComputedStyle(o, null);
}
return s;
}
function pause(millis){
var date = new Date();
var curDate = null;


do { curDate = new Date(); }
while(curDate-date < millis)
}


onloadScrollWidget=window.onload;
window.onload=initScrollWidget;