请问有没有哪位大咖帮忙解释解释这段代码?

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>导航页面</title>
<link href="favicon.ico" rel="shortcut icon"/>
<style type="text/css">
*{margin:0; padding:0; text-decoration:none; border:0;}
body{background-image:url(http://image.tianjimedia.com/uploadImages/2012/273/SYJ43SG47PC8_NatGeo04.jpg); background-size:cover; transition:2s;}
#box{width:70%; height:200px; margin:20px auto; box-shadow:0 0 20px #000 inset; transition:0.2s;}
#box:hover{background-color:#000; opacity: 0.7;}
#box p{line-height:200px; text-align:center; font-size:72px; color:#000;}
#box a:hover p{color:#fff;}
#vice-box{width:70%; margin:20px auto; transition:0.2s;}
#limit{width:100%; overflow:hidden;}
#site{width:24%; height:150px; float:left; margin-left:0.5%; margin-right:0.5%; margin-top:5px; margin-bottom:5px; box-shadow:0 0 20px #000 inset; transition:1s;}
#site:hover{background-color:#000; opacity: 0.7;}
#site p{line-height:150px; text-align:center; font-size:36px; color:#000;}
#site a:hover p{color:#fff;}
#author{width:70%; height:50px; margin:0 auto;}
#name{display:block; width:30%; line-height:50px; margin:0 auto; text-align:center; color:#000; font:15px; transition:2s; cursor:pointer;}
#name:hover{color:#fff;}
#MrH{position:relative; top:5px; width:70%; margin:0 auto; z-index:1;}
#MrH img{position:relative; width:100%; height:0; z-index:1;}
#MrH p{position:absolute; display:inline-block; background-color:#000; opacity:0.8; width:50px; height:25px; line-height:25px; text-align:center; bottom:5px; right:5px; z-index:10; color:#fff; cursor:pointer; transition:1s;}
#MrH p:hover{opacity:1;}
#button{display:inline-block; width:100px; height:50px; position:fixed; right:50px; top:20px; opacity:0.7;color:#fff; cursor:pointer;}
#next{position:relative; float:right; width:50px; text-align:center; line-height:50px; font-size:25px; right:0; background-color:#000;}
#next:hover{opacity:0.9;}
#prev{position:relative; float:left; width:50px; text-align:center; line-height:50px; font-size:25px; left:0; background-color:#000;}
#prev:hover{opacity:0.9;}
</style>
<script type="text/javascript">
    var BGI=9;
    window.onload=function anonymous(){
        var name=document.getElementById("name");
        var hiden=document.getElementById("hiden");
        var next=document.getElementById("next");
        var prev=document.getElementById("prev");
        var page=document.getElementById("page");
        var box=document.getElementById("box");
        var Vbox=document.getElementById("vice-box");
        var button=document.getElementById("button");
        var name=document.getElementById("name");
        var maxImage=19;
        var height=0;
        
        name.onclick=function drop(){
            if(height<450){
                height+=1;
                document.getElementById("photo").style.height=height+"px";
            }
            setTimeout(drop,1);
        }
        
        hiden.onclick=function cover(){
            if(height>=0){
                height-=1;
                document.getElementById("photo").style.height=height+"px";
            }
            setTimeout(cover,1);
        }
        
        prev.onclick=function(){
            alert("抱歉,此页面暂时无法更换背景图。");
        }
        next.onclick=function(){
            BGI++;
            if(BGI>maxImage){
                BGI=1;
            }
            alert("抱歉,此页面暂时无法更换背景图。");
        }
        function width(){
            if(document.body.offsetWidth<971){
                box.style.width="970px";    
                Vbox.style.width="970px";
                button.style.right="0px";
                name.style.width="290px";
            }else{
                box.style.width="70%";    
                Vbox.style.width="70%";
                button.style.right="50px";
                name.style.width="30%";    
            }    
        }
        setInterval(width,500);
    }
</script>
</head>

<body id="page">
<div id="MrH">
    <a href="http://user.qzone.qq.com/1842452856/main" target="_blank" ><img title="点击进入我的空间" id="photo" src="http://image.3001.net/images/new/pic-hk.jpg"></a>
    <p id="hiden">hiden</p>
</div>
<div id="button">
    <p id="next" title="下一张背景图">></p>
    <p id="prev" title="上一张背景图"><</p>
</div>
<div id="box">
    <a href="http://www.baidu.com/" target="_new"><p>Baidu</p></a>
</div>
<div id="vice-box">
    <div id="limit">
        <div id="site">
            <a href="http://www.youku.com/" target="_blank"><p>Youku</p></a>
        </div>
        <div id="site">
            <a href="http://www.taobao.com/" target="_blank"><p>Taobao</p></a>
        </div>
        <div id="site">
            <a href="http://www.sina.com/" target="_blank"><p>Sina</p></a>
        </div>
        <div id="site">
            <a href="http://www.tiexue.net/" target="_blank"><p>Tiexue</p></a>
        </div>
        <div id="site">
            <a href="http://www.iqiyi.com/" target="_blank"><p>Iqiyi</p></a>
        </div>
        <div id="site">
            <a href="http://www.hunantv.com/" target="_blank"><p>HNTV</p></a>
        </div>
        <div id="site">
            <a href="http://www.gamersky.com/" target="_blank"><p>Gamersky</p></a>
        </div>
        <div id="site">
            <a href="http://www.imooc.com/" target="_blank"><p>Imooc</p></a>
        </div>
        <div id="site">
            <a href="http://www.google.com/" target="_blank"><p>Google</p></a>
        </div>
        <div id="site">
            <a href="http://www.youtube.com/" target="_blank"><p>Youtube</p></a>
        </div>
        <div id="site">
            <a href="http://www.twitter.com/" target="_blank"><p>Twitter</p></a>
        </div>
        <div id="site">
            <a href="http://www.facebook.com/" target="_blank"><p>Facebook</p></a>
        </div>
    </div>
</div>
<div id="author">
    <p id="name">Made By Mr.H<br>QQ:1842452856&nbsp;&nbsp;&nbsp;Tel:15674800401</p>
</div>
</body>
</html>

qq_黑夜起的黎明_0
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1回答

子期不遇

放了这么多代码,鬼知道你想要别人给你解释哪段代码!
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