i wish the submenu list show just right under menu,how to do this.

HTML Code:
<!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" lang="zh-CN"> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" /> 
<style type="text/css"> 
<!-- 

.dropdownall{margin:0;padding:0;border:0;} 
body { 
font-family: arial, 宋体, serif; 
font-size:12px; 
} 
#dropdown { 
line-height: 24px; list-style-type: none; background:#666; 
} 
#dropdown a { 
display: block; width: 108px; text-align:center; 
} 
#dropdown a:link { 
color:#666; text-decoration:none; 
} 
#dropdown a:visited { 
color:#666;text-decoration:none; 
} 
#dropdown a:hover { 
color:#FFF;text-decoration:none;font-weight:bold; 
} 
#dropdown li { 
float: left; width: 108px; background:#CCC; 
} 
#dropdown li a:hover{ 
background:#999; 
} 
#dropdown li ul { 
line-height: 27px; list-style-type: none;text-align:left; 
left: -800em; width: 180px; position: absolute; 
} 
#dropdown li ul li{ 
float: left; width: 108px; 
background: #F6F6F6; 
} 
#dropdown li ul a{ wedisplay: block; width: 108px;text-align:center; 
} 
#dropdown li ul a:link { 
color:#666; text-decoration:none; 
} 
#dropdown li ul a:visited { 
color:#666;text-decoration:none; 
} 
#dropdown li ul a:hover { 
color:#F3F3F3;text-decoration:none;font-weight:normal; 
background:#C00; 
} 
#dropdown li:hover ul { 
left: auto; 
} 
#dropdown li.sfhover ul { 
left: auto; 
} 
#content { 
clear: left; 
} 
--> 
</style> 
<script type=text/javascript> 
<!--//--><![CDATA[//><!-- 
function menuFix() { 
var sfEls = document.getElementById("dropdown").getElementsByTagName("li"); 
for (var i=0; i<sfEls.length; i++) { 
sfEls[i].onmouseover=function() { 
this.className+=(this.className.length>0? " ": "") + "sfhover"; 
} 
sfEls[i].onMouseDown=function() { 
this.className+=(this.className.length>0? " ": "") + "sfhover"; 
} 
sfEls[i].onMouseUp=function() { 
this.className+=(this.className.length>0? " ": "") + "sfhover"; 
} 
sfEls[i].onmouseout=function() { 
this.className=this.className.replace(new RegExp("( ?|^)sfhover\\b"), 
""); 
} 
} 
} 
window.onload=menuFix; 
//--><!]]> 
</script> 
</head> 
<body>
<div class="dropdownall">
<ul id="dropdown"> 
<li><a href="#">home</a> </li> 
<li><a href="#">menu</a> 
     <ul> 
         <li><a href="#">submenu 1</a></li> 
         <li><a href="#">submenu 1</a></li> 
     </ul> 
</li> 
<li><a href="#">menu 2</a> 
     <ul> 
         <li><a href="#">submenu 2</a></li> 
     </ul> 
</li> 
<li><a href="#">menu 3</a> 
  <ul> 
      <li><a href="#">submenu 3</a></li> 
      <li><a href="#">submenu 3</a></li>  
   </ul> 
</li> 
<li><a href="#">menu 4</a>  
</li> 
<li><a href="#">menu 5</a> 
    <ul> 
      <li><a href="#">submenu 5</a></li> 
     </ul> 
</li> 
<li><a href="#">menu 6</a>  
</li> 
<li><a href="#">menu 7</a> 
    <ul> 
      <li><a href="#">submenu 7</a></li> 
      <li><a href="#">submenu 7</a></li> 
      <li><a href="#">submenu 7</a></li> 
      <li><a href="#">submenu 7</a></li> 
      <li><a href="#">submenu 7</a></li> 
      <li><a href="#">submenu 7</a></li> 
      <li><a href="#">submenu 7</a></li> 
      <li><a href="#">submenu 7</a></li> 
      <li><a href="#">submenu 7</a></li> 
    </ul> 
</li> 
<li><a href="#">menu 8</a> 
     <ul> 
       <li><a href="#">submenu 8</a></li> 
       <li><a href="#">submenu 8</a></li> 
       <li><a href="#">submenu 8</a></li> 
       <li><a href="#">submenu 8</a></li> 
       <li><a href="#">submenu 8</a></li> 
       <li><a href="#">submenu 8</a></li> 
       <li><a href="#">submenu 8</a></li> 
       <li><a href="#">submenu 8</a></li> 
     </ul> 
</li>
</ul> 
</div>
</body> 
</html>