Hola Renton:
Te paso el código tomado de "http://javascriptsource.com"
***inicio***
<HTML>
<!-- TWO STEPS TO INSTALL PAGE SCROLLER:
1. Copy the coding into the HEAD of your HTML document
2. Add the last code into the BODY of your HTML document -->
<!-- STEP ONE: Paste this code into the HEAD of your HTML document -->
<HEAD>
<style type="text/css">
#item {position:absolute; visibility:hidden; left:0px}
</style>
<SCRIPT LANGUAGE="JavaScript">
<!-- Original: Brian Gosselin (
[email protected]) -->
<!-- Web Site:
http://www.bgaudiodr.iwarp.com -->
<!-- This script and many more are available free online at -->
<!-- The JavaScript Source!!
http://javascript.internet.com -->
<!-- Begin
var isNS=(document.layers);
var _all=(isNS)? '' : 'all.' ;
var _style=(isNS)? '' : '.style' ;
var _visible=(isNS)? 'show' : 'visible';
var w_x, w_y, item, okscroll=false, godown;
function init(){
item=eval('document.'+_all+'item'+_style);
getwindowsize();
item.visibility=_visible;
scrollpage();
}
function getwindowsize() {
w_x=(isNS)? window.innerWidth-5 : document.body.clientWidth;
w_y=(isNS)? window.innerHeight : document.body.clientHeight;
(isNS)? item.clip.width=42: item.width=42;
(isNS)? item.clip.height=20 : item.height=20;
moveitem();
}
function resizeNS() {
setTimeout('document.location.reload()',400);
}
function moveitem() {
if (isNS) {
item.moveTo((pageXOffset+w_x-70),(w_y+pageYOffset-50))
}else{
item.pixelLeft=document.body.scrollLeft+w_x-70;
item.pixelTop=w_y+document.body.scrollTop-50;
}
}
window.onload=init;
(isNS) ? window.onresize=resizeNS : window.onresize=getwindowsize ;
function scrollpage() {
status = '';
if (okscroll) {
if (godown) {
(isNS)? window.scrollBy(0,4) : window.scrollBy(0,4) ;
} else {
(isNS)? window.scrollBy(0,-4) : window.scrollBy(0,-4) ;
}
}
moveitem();
setTimeout('scrollpage()', 40);
}
// End -->
</script>
</HEAD>
<!-- STEP TWO: Copy this code into the BODY of your HTML document -->
<BODY>
<div id="item">
<a href="javascript
:void(0)" onMouseover="okscroll=true; godown=true"
onMouseout="okscroll=false"><img src="down.gif" border="0"></a><a href="javascript
:void(0)"
onMouseover="okscroll=true; godown=false" onMouseout="okscroll=false"><img src="up.gif"
border="0"></a>
</div>
<p><center>
<font face="arial, helvetica" size="-2">Free JavaScripts provided<br>
by <a href="http://javascriptsource.com">The JavaScript Source</a></font>
</center><p>
</BODY>
</HTML>
*** fin ***
Solo tenés