如何让下面对联广告代码在ie和谷歌都可以用？
var delta=0.15;
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.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 = '';
  }
  }
  function closeBanner()
  {
  closeB=true;
  return;
  }

var theFloaters = new floaters();
//
theFloaters.addItem('followDiv1','document.documentElement.clientWidth-75',0,'<a href=/rfpro/stock/ target=_blank><img src="rfpro/stock/images/addl.jpg" width=75 height=295 border=0></a><br><br><img src="rfpro/stock/images/close.png" onClick="closeBanner();">');
theFloaters.addItem('followDiv2',0,0,'<a href=/rfpro/stock/ target=_blank><img src="rfpro/stock/images/addl.jpg" width=75 height=295 border=0 ></a><br><br><img src="rfpro/stock/images/close.png" onClick="closeBanner();">');
theFloaters.play();


------解决方案--------------------
想要都能使用就要去看看代码是不是在2个浏览器下都兼容。。
------解决方案--------------------
followObj.style.left = followObj.offsetLeft + dx+"px";
 followObj.style.top = followObj.offsetTop + dy+"px";
------解决方案--------------------

JScript code

followObj.style.left = followObj.offsetLeft + dx+"px";
followObj.style.top = followObj.offsetTop + dy+"px";