请问如何用javascript做出这样的按钮栏效果(图)?????????

<html>
<head>
<style>#D1 {
    BACKGROUND-COLOR: blue; 
    BORDER-BOTTOM: white 2px outset; 
    BORDER-LEFT: white 2px outset; 
    BORDER-RIGHT: white 2px outset; 
    BORDER-TOP: white 2px outset; 
    LEFT: 0px; POSITION: absolute; 
    TOP: 0px; VISIBILITY: hidden; 
    WIDTH: 300px; 
    layer-background-color: lightgreen
}
a{font-size:9pt}
a:link{text-decoration:none}
a:hover{text-decoration:none;}
a:visited{text-decoration:none}
</style>
<title></title>
</head><body onload="init()">
<script language="javascript">
function menuIn() //菜单隐藏
{
        if(n4) {
                clearTimeout(out_ID)
                if( menu.top > menuH*-1+20+10 ) {  
                        menu.top -= 8
                        in_ID = setTimeout("menuIn()", 1)
                }
                else if( menu.top > menuH*-1+20 ) {
                        menu.top--
                        in_ID = setTimeout("menuIn()", 1)
                }
        }
        else { 
                clearTimeout(out_ID)
                if( menu.pixelTop > menuH*-1+20+10 ) {
                        menu.pixelTop -= 8
                        in_ID = setTimeout("menuIn()", 1) 
                }
                else if( menu.pixelTop > menuH*-1+20 ) {
                        menu.pixelTop--
                        in_ID = setTimeout("menuIn()", 1)
                }
        }
}
function menuOut() //菜单显示
{
        if(n4) {
                clearTimeout(in_ID)
                if( menu.top < -10) { 
                        menu.top += 4
                        out_ID = setTimeout("menuOut()", 1)
                }
                else if( menu.top < 0) { 
                        menu.top++
                        out_ID = setTimeout("menuOut()", 1)
                }
                
        }
        else { 
                clearTimeout(in_ID)
                if( menu.pixelTop < -10) {
                        menu.pixelTop += 2
                        out_ID = setTimeout("menuOut()", 1)
                }
                else if( menu.pixelTop < 0 ) {
                        menu.pixelTop++
                        out_ID = setTimeout("menuOut()", 1)
                }
        }
}
function fireOver() { 
        clearTimeout(F_out)           
        F_over = setTimeout("menuOut()", 10) 
}
function fireOut() { 
        clearTimeout(F_over)
         F_out = setTimeout("menuIn()", 10)
}
function init() {
        if(n4) {
                menu = document.D1
                menuH = menu.document.height
                menu.top = menu.document.height*-1+20 
                menu.onmouseover = menuOut
                menu.onmouseout = menuIn
        menu.visibility = "visible"
        }
        else if(e4) {
                menu = D1.style
                menuH = D1.offsetHeight
                D1.style.pixelTop = D1.offsetHeight*-1+20
                D1.onmouseover = fireOver
                D1.onmouseout = fireOut
                D1.style.visibility = "visible"
        }
}
F_over=F_out=in_ID=out_ID=null
n4 = (document.layers)?1:0
e4 = (document.all)?1:0;
<!-- 此特效使用《网页特效精灵》编辑制作-->
<!-- 奥天软件：http://www.aosky.net-->
</script>
<div id="D1">
<table border="0" width="100%" bgcolor="#FFFFC1">
<TBODY>
  <tr>
    <td align="middle" bgColor="ff0000" rowSpan="2"><b style="COLOR: ub39a1">M<br>
    E<br>
    N<br>
    U</b></td>
    <td>　<ul>
      <li><a href="link.htm">选&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;项 1</a> </li>
      <li><a href="link.htm">选&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;项 2</a> </li>
      <li><a href="link.htm">选&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;项 3</a> </li>
      <li><a href="link.htm">选&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;项 4</a> </li>
      <li><a href="link.htm">选&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;项 5</a> </li>
    </ul>
    </td>
    <td>　<ul>
      <li><a href="link.htm">选&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;项 6</a> </li>
      <li><a href="link.htm">选&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;项 7</a> </li>
      <li><a href="link.htm">选&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;项 8</a> </li>
      <li><a href="link.htm">选&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;项 9</a> </li>
      <li><a href="link.htm">选&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;项 10</a> </li>
    </ul>
    </td>
  </tr>
  <tr>
    <td align="right" colSpan="2"></td>
  </tr>
</TBODY>
</table>
</div>
</body>
</html>