simple thinking

<script src='http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js' type='text/javascript'/>

<script type='text/javascript'>
function mainmenu(){
$(&quot; #nav ul &quot;).css({display: &quot;none&quot;}); // Opera Fix
$(&quot; #nav li&quot;).hover(function(){
$(this).find(&#39;ul:first&#39;).css({visibility: &quot;visible&quot;,display: &quot;none&quot;}).show(400);
},function(){
$(this).find(&#39;ul:first&#39;).css({visibility: &quot;hidden&quot;});
});
}
$(document).ready(function(){    
mainmenu();
});

</script>
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<ul id='nav'>
<li><a href='/'>Home</a></li>
<li><a href='http://www.rikyrizkiyana.co.cc/'>Riky Rizkiyana</a></li>
<li><a href='#'>Demo Dropdown Menu jQuery &#187;</a>
<ul>
<li><a href='#'>Tutorial &#187;</a>
<ul>
<li><a href='http://www.rikyrizkiyana.co.cc/2010/05/cara-membuat-back-to-top-menggunakan.html'>Back to Top</a></li>
<li><a href='http://www.rikyrizkiyana.co.cc/2010/05/link-hover-dengan-jquery.html'>Link Hover</a></li>
</ul>
</li>
<li><a href='http://www.rikyrizkiyana.co.cc/2010/05/cara-membuat-jquery-color-picker-di_12.html'>jQuery Color Picker</a></li>
<li><a href='http://www.rikyrizkiyana.co.cc/2010/05/cara-membuat-menu-horizontal-ala-cnncom.html'>Menu Horizontal Ala CNN.com</a></li>
<li><a href='http://www.rikyrizkiyana.co.cc/2010/05/cara-membuat-tabbed-sidebar-by-abu.html'>Tabbed Sidebar by Abu Farhan</a></li>
</ul>
</li> <div class='clear'/>
</ul>

#nav{
background-color: #fff;
border: 1px solid #ccc;
}
#nav, #nav ul{
width: 960px;
margin:0px auto;
padding:5px 0;
list-style-type:none;
list-style-position:outside;
position:relative;
line-height:1.5em;
text-align:left;
}
#nav a{
display:block;
padding:2px 10px;
border:1px solid #212421;
color:#fff;
text-decoration:none;
background-color:#212421;
}
#nav a:hover{
background-color:#333;
}
#nav li{
float:left;
position:relative;
padding:0px 5px;
}
#nav ul {
position:absolute;
display:none;
width:12em;
top:100%;
left:0;
}
#nav li ul a{
width:12em;
height:auto;
float:left;
}
#nav ul ul{
top:auto;
}
#nav li ul ul {
left:13em;
margin:0px 0 0 10px;
}
#nav li:hover ul ul, #nav li:hover ul ul ul, #nav li:hover ul ul ul ul{
display:none;
}
#nav li:hover ul, #nav li li:hover ul, #nav li li li:hover ul, #nav li li li li:hover ul{
display:block;
}