2017电脑什么游戏赚钱:哪位可以把下面两段网页程序加上注释，谢谢！

哪位可以把下面两段网页程序加上注释，尽量详细，比如每个变量的用途，方法的用途，总之，只要能让我看明白就行！谢谢！
<script language="JavaScript">
function scrollit(seed)//seed为显示的正文距状态栏左端的距离
{ var m1 = "HI：你 好! " ;
var m2 = "欢 迎 访 问 我 的 站 点 " ;
var m3 = "请 多 提 意 见，谢 谢 " ;
var m4 = "E-MAIL:wdduf@sohu.com " ;
var msg=m1+m2+m3+m4;//要显示的正文
var out = " ";//该变量存放加前导空格的正文
var c = 1;
var speed = 200;//间隔的时间

if (seed > 100)
{ seed-=2;
var cmd="scrollit(" + seed + ")";
timerTwo=window.setTimeout(cmd,speed);
}
else if (seed <= 100 && seed > 0)
{ for (c=0 ; c < seed ; c++)
{ out+=" ";//生成 seed 个前导空格。
}
out+=msg;
seed--;
//var cmd="scrollit(" + seed + ")";
window.status=out;
var cmd="scrollit(" + seed + ")";
timerTwo=window.setTimeout(cmd,speed);
}
else if (seed <= 0)
{ if (-seed < msg.length)
{out+=msg.substring(-seed,msg.length);
seed--;
var cmd="scrollit(" + seed + ")";
window.status=out;
timerTwo=window.setTimeout(cmd,speed);
}
else
{//document.write(seed);
window.status=" ";
timerTwo=window.setTimeout("scrollit(100)",10);
}
}
}
scrollit(100);
</script>

<script language="JavaScript">
var msg = "常来这里看看吧 " ;
var interval = 100;
//var spacelen = 120;
//var space10=" ";
var seq=0;
function scroll() {
len = msg.length;
window.status = msg.substring(0, seq+1);
seq++;
if ( seq >= len ) {
seq = 0;
window.status = '';
window.setTimeout("scroll();", interval );
}
else
window.setTimeout("scroll();", interval );
}
scroll();
</script>