var ad_80= new Array(1);
var ad_250= new Array(1);

 ad_80[0]="<a href=http://www.webjx.com target=_blank><img src=/img2/js050121_1.gif border=0></a>";
 ad_250[0]="<a href=http://www.webjx.com target=_blank><img src=/img2/js050121_2.gif border=0></a>";

var imgheight;
var fubioleft;
window.screen.width>800 ? fubioleft=15:fubioleft=15

document.write('<DIV id=floater_left style="Z-INDEX: 25; LEFT:'+fubioleft+'px; WIDTH: 28px;POSITION: absolute; TOP: 42px; HEIGHT: 22px">');

ad_now = new Date();
ad_id= ad_now.getSeconds() %1

var adhead1="<div id=div_80 style='position:absolute; width:95px; height:62px; z-index:12' onMouseOver=bigshow();>";
var adhead2="</div><div id=div_250 style='position:absolute;  visibility: hidden; z-index:13;width: 80; height: 60'  onMouseOut=bighide();>";

document.write(adhead1+ad_80[ad_id]+adhead2+ad_250[ad_id]+"</div>");

document.write ("</div>");
 self.onError=null;
 currentX = currentY = 0; 
     whichIt = null;          
     lastScrollX = 0; lastScrollY = 0;
     NS = (document.layers) ? 1 : 0;
     IE = (document.all) ? 1: 0;    
     function heartBeat() {
      if(IE) {
  diffY = document.body.scrollTop;
  diffX = document.body.scrollLeft; }
             if(NS) {
   diffY = self.pageYOffset; diffX = self.pageXOffset; }
      if(diffY != lastScrollY) {
                     percent = .5 * (diffY - lastScrollY);
                     if(percent > 0) percent = Math.ceil(percent);
                     else percent = Math.floor(percent);
         if(IE) document.all.floater_left.style.pixelTop += percent;
         if(NS) document.floater_left.top += percent;
                     lastScrollY = lastScrollY + percent;
         }
      if(diffX != lastScrollX) {
       percent = .5 * (diffX - lastScrollX);
       if(percent > 0) percent = Math.ceil(percent);
       else percent = Math.floor(percent);
       if(IE) document.all.floater_left.style.pixelLeft += percent;
       if(NS) document.floater_left.left += percent;
       lastScrollX = lastScrollX + percent;
      }
     }
 
     if(NS || IE) action = window.setInterval("heartBeat()",1);var ad_80= new Array(1);
var ad_250= new Array(1);

 ad_80[0]="<a href=http://www.webjx.com target=_blank><img src=/img2/js050121_2.gif border=0></a>";
 ad_250[0]="<a href=http://www.webjx.com target=_blank><img src=/img2/js050121_1.gif border=0></a>";

var imgheight;
var fubioleft;
window.screen.width>800 ? fubioleft=15:fubioleft=15

document.write('<DIV id=floater_right style="Z-INDEX: 25; LEFT:'+fubioleft+'px; WIDTH: 28px;POSITION: absolute; TOP: 42px; HEIGHT: 22px">');

ad_now = new Date();
ad_id= ad_now.getSeconds() %1

 function myload()
{
if (navigator.appName == "Netscape")
{
document.div_right_80.pageX=+window.innerWidth-130;
document.div_right_250.pageX=+window.innerWidth-300;
mymove();
}
else
{
div_right_80.style.left=document.body.offsetWidth-130;
div_right_250.style.left=document.body.offsetWidth-300;
mymove();
}
}

function mymove()
 {
 if(document.ns)
 {
 document.div_right_80.left=pageXOffset+window.innerWidth-130;
 document.div_right_250.left=pageXOffset+window.innerWidth-300;
 setTimeout("mymove();",20)
 }
 else
 {
div_right_80.style.left=document.body.scrollLeft+document.body.offsetWidth-145;
div_right_250.style.left=document.body.scrollLeft+document.body.offsetWidth-300;
setTimeout("mymove();",20)
 }
 }

 

var adhead1="<div id=div_right_80 style='position:absolute; width:95px; height:60px; z-index:12' onMouseOver=bigshow_right();>";
var adhead2="</div><div id=div_right_250  style='position:absolute;  visibility: hidden; z-index:13;width: 250; height: 250' onMouseOut=bighide_right();><div align=right>";

document.write(adhead1+ad_80[ad_id]+adhead2+ad_250[ad_id]+"</div></div>");

myload()

document.write ("</div>");
 self.onError=null;
 currentX_right = currentY_right = 0; 
     whichIt_right = null;          
     lastScrollX_right = 0; lastScrollY_right = 0;
     NS = (document.layers) ? 1 : 0;
     IE = (document.all) ? 1: 0;    
     function heartBeat_right() {
      if(IE) {
  diffY_right = document.body.scrollTop;
  diffX_right = document.body.scrollLeft; }
             if(NS) {
   diffY_right = self.pageYOffset; diffX_right = self.pageXOffset; }
      if(diffY_right != lastScrollY_right) {
                     percent_right = .5 * (diffY_right - lastScrollY_right);
                     if(percent_right > 0) percent_right = Math.ceil(percent_right);
                     else percent_right = Math.floor(percent_right);
         if(IE) document.all.floater_right.style.pixelTop += percent_right;
         if(NS) document.floater_right.top += percent_right;
                     lastScrollY_right = lastScrollY_right + percent_right;
         }
      if(diffX_right != lastScrollX_right) {
       percent_right = .5 * (diffX_right - lastScrollX_right);
       if(percent_right > 0) percent_right = Math.ceil(percent_right);
       else percent_right = Math.floor(percent_right);
       if(IE) document.all.floater_right.style.pixelLeft += percent_right;
       if(NS) document.floater_right.left += percent_right;
       lastScrollX_right = lastScrollX_right + percent_right;
      }
     }
 
     if(NS || IE) action = window.setInterval("heartBeat_right()",1);
function bigshow_right(){
document.all.div_right_250.style.visibility = 'visible';
document.all.div_right_80.style.visibility = 'hidden';
}
function bighide_right(){
document.all.div_right_80.style.visibility = 'visible';
document.all.div_right_250.style.visibility = 'hidden';
}document.write('');
document.write('');
document.write('');

　　把上面的代码另存为一个JS文件，然后在想实现此效果的页面用<script type="text/javascript" language="javascript1.2" src="*.js"></SCRIPT>调用即可，*代表你另存的文件名！注意修改广告图片地址和连接地址！

原文转自：http://www.ltesting.net