js左右弹性滚动对联广告代码分享

.shuoming {margin-top:20px; border:1px solid #ccc; padding-bottom:10px; width:600px; margin:0 auto;}
.shuoming dt {height:30px; line-height:30px; font-weight:bold; text-indent:10px;}
.shuoming dd {line-height:20px; padding:5px 20px;}</style></p>
<script language=JavaScript >
 var delta=0.08
 var collection;
 function floaters() {
  this.items = [];
  this.addItem = function(id,x,y,content)
      {
     document.write('<DIV id='+id+' style="Z-INDEX: 10; POSITION: absolute;  width:80px; height:60px;left:'+(typeof(x)=='string'?eval(x):x)+';top:'+(typeof(y)=='string'?eval(y):y)+'">'+content+'</DIV>');

     var newItem    = {};
     newItem.object   = document.getElementById(id);
     newItem.x    = x;
     newItem.y    = y;

     this.items[this.items.length]  = newItem;
      }
  this.play = function()
      {
     collection    = this.items
     setInterval('play()',10);
      }
  }
  function play()
  {

   for(var i=0;i<collection.length;i++)
   {
    var followObj  = collection[i].object;
    var followObj_x  = (typeof(collection[i].x)=='string'?eval(collection[i].x):collection[i].x);
    var followObj_y  = (typeof(collection[i].y)=='string'?eval(collection[i].y):collection[i].y);

    if(followObj.offsetLeft!=(document.documentElement.scrollLeft+followObj_x)) {
     var dx=(document.documentElement.scrollLeft+followObj_x-followObj.offsetLeft)*delta;
     dx=(dx>0?1:-1)*Math.ceil(Math.abs(dx));
     followObj.style.left=followObj.offsetLeft+dx;
     }

    if(followObj.offsetTop!=(document.documentElement.scrollTop+followObj_y)) {
     var dy=(document.documentElement.scrollTop+followObj_y-followObj.offsetTop)*delta;
     dy=(dy>0?1:-1)*Math.ceil(Math.abs(dy));
     followObj.style.top=followObj.offsetTop+dy;
     }
    followObj.style.display = '';
   }
  } 

 var theFloaters  = new floaters();
 //右面
 theFloaters.addItem('followDiv1','document.documentElement.clientWidth-106',80,'<img src=http://pic.jb51.net/sudu.gif id=ad />');
 //左面
 theFloaters.addItem('followDiv2',6,80,'<img src=http://pic.jb51.net/sudu.gif id=ad />');
 theFloaters.play();

//图片格式调用方法
//<a href=https://www.jb51.net.net/ target=_blank><img  src=http://pic.jb51.net/sudu.gif border=0></a>

</script>
<table border="0" cellspacing="0" cellpadding="0" width="778" bgcolor="#f4f4f4" align="center" height="1500">
    <tbody>
        <tr>
            <td valign="top" align="center"><br />
            <dl class="shuoming"></dl></td>
        </tr>
    </tbody>
</table>