怎么实现点击后屏幕翻滚 _JavaScript

如何实现点击后屏幕翻滚
比如现在有a b c d ....一些字母
然后下面有
A TABLE
B TABLE
C TABLE ....
现在要实现的是我点击Z，屏幕就移动到Z这个地方。点击D屏幕就到D这个地方
就象BAIDU里根据字母查歌手一下的效果
http://list.mp3.baidu.com/singer/singers.html?id=1?top7
跪求！！！

------解决方案--------------------
<a name= "a "> </a>

...........

<a href= "#a "> Goto A </a>
------解决方案--------------------

<a href= "#a "> Goto aaaa </a> <a href= "#b "> Goto bbb </a>
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
<a name= "a "> </a> aaaa
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
 a 
<a name= "b "> </a> bbbbbbbbb
 a