<!-- 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;
var speed = 1; //滚动速度
var oldspeed = speed; //记录初始速度
var UpTimer;
var DownTimer; //两个Timer
function init(){
item=eval('document.'+_all+'item'+_style);
getwindowsize();
item.visibility=_visible;
scrollpage();
}
function getwindowsize() {
w_x=(isNS)? window.innerWidth-5 : document.body.clientWidth-190;
w_y=(isNS)? window.innerHeight : document.body.clientHeight-10;
(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,speed) : window.scrollBy(0,speed) ;
} else {
(isNS)? window.scrollBy(0,-speed) : window.scrollBy(0,-speed) ;
}
}
moveitem();
setTimeout('scrollpage()', 40);
}
function ScrollDown()
{
okscroll=true;
godown=true;
if (speed <20)
{
speed = speed + 2;
}
<SCRIPT language=JavaScript>
<!--
var msg = "This page requires version 4 or later of\n Netscape Navigator or Internet Explorer"
var dyn = (document.layers || document.all) ? true : alert(msg);
var nav = (document.layers) ? true : false;
var iex = (document.all) ? true : false;
var lft = 10;
var pos = 10;
var stp = 10;
var spd = 150;
var upr = -390;
var lwr = 30;
var tim;
function scroll_up() //窗口向上滚动
{
if(pos > upr) pos -= stp;
do_scroll(pos);
tim = setTimeout("scroll_up()", spd);
}
function scroll_dn() ////窗口向上滚动
{
if(pos < lwr) pos += stp;
do_scroll(pos);
tim = setTimeout("scroll_dn()", spd);
}