调试易

楼上说的对，别被工具所累了!放到环境下测试下，看看有没有效果就好了.因为各个浏览器对DOM支持的不是完全一样，有些代码还跟浏览器有关系.这就是js最不好确定写发的原因,比如用div的相对位置来定义他的位置,在ie里没问题，在firefox里面可就不行了.
我也尝试用过scrollleft什么的，但后来都没有成功.呵呵!不过有些漂浮广告用这个用的很好.我给你个代码,你看看是怎来用的!
<!--  Written by Myhyli, 2003/07/21. okajax.com  -->
<!--  Member Of okajax Web Team. -->
<!--  Welcome to www.okajax.com. --> var delta=0.8;
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-106',80,'<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="97" height="233"><param name="movie" value="images/ad-02.swf"><param name="quality" value="high"><embed src="images/ad-02.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="97" height="233"></embed></object><br><br><img src=images/close.gif onClick="closeBanner();">');
theFloaters.addItem('followDiv2',6,80,'<object classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="97" height="233"><param name="movie" value="images/ad-02.swf"><param name="quality" value="high"><embed src="images/ad-02.swf" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="application/x-shockwave-flash" width="97" height="233"></embed></object><br><br><img src=images/close.gif onClick="closeBanner();">');
theFloaters.play();
//<a href=http://www.okajax.com target=_blank><img src=/gg/blueidea/2004/digimms.gif width=100 height=100 border=0></a><a href=/news/game/2004/2363.asp><img src=/gg/computerarts/5000.gif width=100 height=150 border=0></a>
把他村成一个js文件，再直接引入到一个页面里，就能漂浮了.