现在很多网站广告做的如火如荼，现在我就来介绍一下常见的对联浮动广告效果的代码使用方法，本文介绍的这种效果，在1024*768分辨率下正常显示，在800*600的分辨率下可以自动隐藏，以免遮住页面影响访问者浏览内容，而且与前面两个代码不同的是，广告图下方增加了一个图片按纽，允许访客点击关闭广告图片，下面文本框中就是实现效果所需代码：

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.object.style.display = \'none\';
}
return;
}
for(var i=0;i<collection.length;i++)
{
var followObj = collection.object;
var followObj_x = (typeof(collection.x)==\'string\'?eval(collection.x):collection.x);
var followObj_y = (typeof(collection.y)==\'string\'?eval(collection.y):collection.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\',0,\'<a onClick="closeBanner();" href=http://www.4ico.com target=_blank><img src=ad/doublead/right.gif width=100 height=554 border=0></a><br><br><img src=ad/doublead/close.gif onClick="closeBanner();">\');
theFloaters.addItem(\'followDiv2\',0,0,\'<a onClick="closeBanner();" href=http://www.4ico.com target=_blank><img src=ad/doublead/ad_ad.gif width=100 height=400 border=0 ></a><br><br><img src=ad/doublead/close.gif onClick="closeBanner();">\');
theFloaters.play();



把上面的代码另存为一个JS文件，然后在想实现此效果的页面用<script type="text/javascript" language="javascript1.2" src="*.js"></SCRIPT>调用即可，*代表你另存的文件名！注意修改广告图片地址和连接地址！