// Script:   Page Scroller Script - Version 2.5
// Author:  Brian Gosselin
// Site:      scriptasylum.com
// E-mail:   scriptasylum@hotmail.com

var isMinNS4 = (navigator.appName.indexOf("Netscape")>=0 && parseFloat(navigator.appVersion) >= 4 && parseFloat(navigator.appVersion) < 5)? true : false;
var isMinIE4 = (document.all)? true : false;
var isMinNS6 = (parseFloat(navigator.appVersion) >= 5 && navigator.appName.indexOf("Netscape")>=0 )? true: false;
var w_x, w_y, item, okscroll=false, godown, scrollamount=2;

function init(){
if(isMinNS4)item=document.item;
if(isMinNS6)item=document.getElementById('item');
if(isMinIE4)item=document.all.item;
moveitem();
(isMinNS4)? item.visibility="show" : item.style.visibility="visible";
setInterval('scrollpage()' , 50);
}

function setscroll(ismore){
scrollamount= (ismore)? Math.min(30 , scrollamount+2) : Math.max(1, scrollamount-2);
}

function moveitem(){
if(isMinNS4 || isMinNS6){
w_x=window.innerWidth;
w_y=window.innerHeight;
scrlx=window.pageXOffset;
scrly=window.pageYOffset;
}else{
w_x=document.body.clientWidth;
w_y=document.body.clientHeight;
scrlx=document.body.scrollLeft;
scrly=document.body.scrollTop;
}
if(isMinNS4){
item.moveTo((scrlx+w_x-70),(scrly+w_y-50))
}else{
item.style.left=scrlx+w_x-70+'px';
item.style.top=scrly+w_y-50+'px';
}}

function scrollpage(){
status='';
if(okscroll){
(godown)? window.scrollBy(0,scrollamount) : window.scrollBy(0,-scrollamount) ;
}
moveitem();
}

var txt=(isMinNS4)? '<layer name="item" visibility="hidden" top="0" left="0" width="42" height="20">' : '<div id="item" style="position:absolute; visibility:hidden; left:0px; top:0px; width: 42px; height:20px">';
txt+='<a href="javascript:setscroll(false)" onMouseover="okscroll=true; godown=true" onMouseout="okscroll=false"><img src="down.gif" border="0" alt="Click to slow down"></a><a href="javascript:setscroll(true)" onMouseover="okscroll=true; godown=false" onMouseout="okscroll=false"><img src="up.gif" border="0" alt="Click to speed up"></a>';
txt+=(isMinNS4)? '</layer>' : '</div>';
document.write(txt);

window.onload=init;