menuBarHolder { width: 730px; height:45px; background-color:#000; color:#fff; font-family:Arial; font-size:14px; margin-top:20px;}
#menuBarHolder ul{ list-style-type:none; display:block;}
#container { margin-top:100px;}
#menuBar li{ float:left; padding:15px; height:16px; width:50px; border-right:1px solid #ccc; }
#menuBar li a{color:#fff; text-decoration:none; letter-spacing:-1px; font-weight:bold;}
.menuHover { background-color:#999;}
.firstchild { border-left:1px solid #ccc;}
.menuInfo { cursor:hand; background-color:#000; color:#fff;
width:74px; font-size:11px;height:100px; padding:3px; display:none;
position:absolute; margin-left:-15px; margin-top:-15px;
-moz-border-radius-bottomright: 5px;
-moz-border-radius-bottomleft: 5px;
-webkit-border-bottom-left-radius: 5px;
-webkit-border-bottom-right-radius: 5px;
-khtml-border-radius-bottomright: 5px;
-khtml-border-radius-bottomleft: 5px;
border-radius-bottomright: 5px;
border-radius-bottomleft: 5px;
}

<div id="menuBarHolder">
<ul id="menuBar">
<li class="firstchild"><a href="javascript:#">Home</a>
<div class="menuInfo">I am some text about the home section</div></li>
<li><a href="javascript:#">Services</a>
<div class="menuInfo">I am some text about the services section</div></li>
<li><a href="javascript:#">Clients</a>
<div class="menuInfo">I am some text about the clients section</div></li>
<li><a href="javascript:#">Portfolio</a>
<div class="menuInfo">I am some text about the portfolio section</div></li>
<li><a href="javascript:#">About</a>
<div class="menuInfo">I am some text about the about section</div></li>
<li><a href="javascript:#">Blog</a>
<div class="menuInfo">I am some text about the blog section</div></li>
<li><a href="javascript:#">Follow</a>
<div class="menuInfo">I am some text about the follow section</div></li>
<li><a href="javascript:#">Contact</a>
<div class="menuInfo">I am some text about the contact section</div></li>
</ul>
</div>

$(document).ready(function()
{
$('#menuBar li').click(function()
{
var url = $(this).find('a').attr('href');
document.location.href = url;
});
$('#menuBar li').hover(function()
{
$(this).find('.menuInfo').slideDown();
},
function()
{
$(this).find('.menuInfo').slideUp();
});
});