高分求:/关于 网站左右两边浮动广告JS代码 的问题:

Question

下面这段代码是网友发的
谁能帮忙解释一下如何使用？
http://bbs.tydown.com/TopicOther.asp?t=5&BoardID=19&id=1684谢谢！！

Answer 1

参考这个
两边都有广告，左两个右两个var delta=0.15
var collection;
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()',10);
    }
}
function play()
{
    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 = '';
    }
}

var theFloaters = new floaters();
theFloaters.addItem('followDiv1','document.body.clientWidth-110',200,'<a href=http://www.15668.com/yp/rega.php?upuser=u_sykudown_n target=_blank><img src=http://www.syku.net/down/index/15668regyp.gif width=100 height=84 border=0></a><br><br><a href=http://union.kingsoft.com/union/download/index.html?uid=5673 target=_blank><img src=http://www.syku.net/down/index/king120120.GIF width=120 height=120 border=0></a><br>');
theFloaters.addItem('followDiv2',10,200,'<a href=# target=_blank><img src=http://www.syku.net/down/index/100_100ad.gif width=100 height=100 border=0></a><br><br><a href=http://adfarm.mediaplex.com/ad/ck/4080-22903-9499-0?aid=syku;mini20_120x120;1yuan&mpro=http://pages.ebay.com.cn/im/landing/1yuan/1yuan.html target=_blank><img src=http://www.syku.net/down/index/mini20_120x120.gif border=0></a><br>');
theFloaters.play();

Answer 2

第一步：将下面这段保存为：flr.js文件
var imgheight
document.ns = navigator.appName == "Netscape"
window.screen.width>800 ? imgheight=100:imgheight=120
function myload()
{
if (navigator.appName == "Netscape")
{document.dangdang.pageY=pageYOffset+window.innerHeight-imgheight-0;
document.dangdang.pageX=+window.innerWidth-107;
mymove();
}
else
{
dangdang.style.top=document.body.scrollTop+document.body.offsetHeight-imgheight-0;
dangdang.style.left=document.body.offsetWidth-107;
mymove();
}
}
function mymove()
{
if(document.ns)
{
document.dangdang.top=pageYOffset+window.innerHeight-imgheight-0;
document.dangdang.left=pageXOffset+window.innerWidth-107;
setTimeout("mymove();",50)
}
else
{
dangdang.style.top=document.body.scrollTop+document.body.offsetHeight-imgheight-0;
dangdang.style.left=document.body.scrollLeft+document.body.offsetWidth-107;
setTimeout("mymove();",50)
}
}function MM_reloadPage(init) { //reloads the window if Nav4 resized
if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true)if (navigator.appName == "Netscape")
{
document.write("<layer id=dangdang top=300 width=80 height=80><a target=\'_blank\' 
href=\'http://images.sohu.com/cs/minisite/shouxin07/index.htm\'><img border=\'0\' 
src=\'../guanggao/8080.GIF\' width=\'80\' height=\'80\'></a></layer>");
myload()}
else
{
document.write("<div id=dangdang style=\'position: absolute;width:80;top:300;left:5;visibility:
visible;z-index: 1\'><a target=\'_blank\' href=\'http://images.sohu.com/cs/minisite/
shouxin07/index.htm\'><img border=\'0\' src=\'../guanggao/8080.GIF\' width=\'80\' height=\'80\'></a>
</div>");
myload()
}
第二步：将下面这段保存为：fll.js文件var imgheight
var imgleft
document.ns = navigator.appName == "Netscape"
window.screen.width>800 ? imgheight=110:imgheight=110
window.screen.width>800 ? imgleft=5:imgleft=5
function myload()
{
if (navigator.appName == "Netscape")
{document.myleft.pageY=pageYOffset+window.innerHeight-imgheight;
document.myleft.pageX=imgleft;
leftmove();
}
else
{
myleft.style.top=document.body.scrollTop+document.body.offsetHeight-imgheight;
myleft.style.left=imgleft;
leftmove();
}
}
function leftmove()
{
if(document.ns)
{
document.myleft.top=pageYOffset+window.innerHeight-imgheight
document.myleft.left=imgleft;
setTimeout("leftmove();",80)
}
else
{
myleft.style.top=document.body.scrollTop+document.body.offsetHeight-imgheight;
myleft.style.left=imgleft;
setTimeout("leftmove();",80)
}
}function MM_reloadPage(init) { //reloads the window if Nav4 resized
if (init==true) with (navigator) {if ((appName=="Netscape")&&(parseInt(appVersion)==4)) {
document.MM_pgW=innerWidth; document.MM_pgH=innerHeight; onresize=MM_reloadPage; }}
else if (innerWidth!=document.MM_pgW || innerHeight!=document.MM_pgH) location.reload();
}
MM_reloadPage(true)if (navigator.appName == "Netscape")
{
document.write("<layer id=myleft top=300 width=80 height=80><a target=\'_blank\' 
href=\'http://www.polocars.com/\'><img border=\'0\' src=\'../guanggao/polosx-hp-mv.gif\' 
width=\'80\' height=\'80\'></a></layer>");
myload()}
else
{
document.write("<div id=myleft style=\'position: absolute;width:80;top:300;left:5;visibility: 
visible;z-index: 1\'><a target=\'_blank\' href=\'http://www.polocars.com/\'><img border=\'0\' 
src=\'../guanggao/polosx-hp-mv.gif\' width=\'80\' height=\'80\'></a></div>");
myload()
}第三步：在要调用的页面的html代码中加入：
<SCRIPT language="JavaScript" src="flr.js"></SCRIPT>
<SCRIPT language="JavaScript" src="fll.js"></SCRIPT>注意：三个文件需要在同一目录下