实现根据分辨率不同而是否显示的两侧广告（800*600下不显示）

 var delta=0.015;
 var collection;
 var closeB=false;
 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()',30);
      }
  }
  function play()
  {
   if(screen.width<=800 || closeB)
   {
    for(var i=0;i<collection.length;i++)
    {
     collection[i].object.style.display = 'none';
    }
    return;
   }
   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.body.scrollLeft+followObj_x)) {
     var dx=(document.body.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.body.scrollTop+followObj_y)) {
     var dy=(document.body.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 = '';
   }
  }
  function closeBanner()
  {
   closeB=true;
   return;
  }

 var theFloaters  = new floaters();
 //
 theFloaters.addItem('followDiv1','document.body.clientWidth-100',40,'<a onClick="closeBanner();" href=# target=_blank><img src=http://www.xxxx.com/n.jpg width=90 height=350 border=0></a><br><br><img src=http://www.xxxx.com/g.jpg onClick="closeBanner();">');
 theFloaters.addItem('followDiv2','10',40,'<a onClick="closeBanner();" href=# target=_blank><img src=http://www.xxxx.com/n.jpg width=90 height=350 border=0 ></a><br><br><img src=http://xxxx.com/g.jpg onClick="closeBanner();">');
 theFloaters.play();
将以上部分保存为js，名字你随便起。
图片路径自己修改就可以；
然后在你想要显示页面上加入<script language="javascript" src="你起的名字.js"></script>