js左右弹性滚动对联广告代码

<meta content="text/html; charset=gb2312" http-equiv="Content-Type" /><style type="text/css">
.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.jbxue.com/sudu.gif id=ad />');
//左面
theFloaters.addItem('followDiv2',6,80,'<img src=http://pic.jbxue.com/sudu.gif id=ad />');
theFloaters.play();
//图片格式调用方法
//<a href=http://www.jbxue.com/ target=_blank><img  src=http://pic.jbxue.com/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>