, as shown
<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
<title></title>
<style type= "Text/css" >
#menu
{
Margin-left:auto;
Margin-right:auto;
width:1000px;
}
ul {
margin:0px;
padding:0px;
height:30px;
}
ul li {
Float:left;
Display:inline;
Font:0.9em Arial, Helvetica, Sans-serif;
height:30px;
width:100px;
List-style:none;
}
ul Li a {
color: #F4F4F4;
Text-decoration:none;
Text-align:center;
line-height:29px;
width:91px;
margin:0px;
padding:0px 0px 0px 8px;
Display:block;
border-right:solid 1px #ccc;
border-bottom:solid 1px #ccc;
background: #808080;
}
ul Li ul li {height:25px;}
ul Li ul li a {
background: #666;
line-height:24px;
}
ul li a:hover {background: #666;}
ul Li ul {visibility:hidden;}
UL Li:hover ul {visibility:visible;}
ul Li ul li a:hover {background: #333;}
</style>
<body>
<div id= "menu" >
<ul>
<li><a href= "#" > Menu one </a></li>
<li><a href= "#" > Menu two </a>
<ul>
<li><a href= "#" > submenu one </a></li>
<li><a href= "#" > submenu two </a></li>
<li><a href= "#" > Sub-menu three </a></li>
</ul>
</li>
<li><a href= "#" > Menu three </a></li>
<li><a href= "#" > Menu four </a>
<ul>
<li><a href= "#" > submenu one </a></li>
<li><a href= "#" > submenu two </a></li>
<li><a href= "#" > Sub-menu three </a></li>
</ul>
</li>
<li><a href= "#" > Menu five </a></li>
</ul>
</div>
</body>
Pure CSS Write drop-down menu