例子，js实现的对联广告代码。
<html>
<head>
<title>js浮动对联广告代码</title>
<meta http-equiv="content-type" content="text/html; charset=gb2312">
</head>
<body>
<p>
<script >
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();
</script>
</p>
</body>
</html>