CSS Menu not showing sub items - html

Question

I have this css code for a menu:
/** CUSTOMER MENU **/
#CustomerMenu {
margin-bottom:10px;
}
#CustomerMenu ul {
padding: 0;
margin:0 auto 0 auto;
list-style-type: none;
text-align: center;
display:inline;
}
#CustomerMenu ul li {
display: inline;
}
#CustomerMenu ul li a {
text-decoration: none;
padding: 10px;
color: #FFFFFF;
background-color: #666666;
}
#CustomerMenu ul li a:hover {
color: #fff;
background-color: #f36f25;
}
/** CUSTOMER MENU **/
but its not showing the sub items - fiddle below:
http://jsfiddle.net/dvborqgm/

Answer 1

Here's a quick fix: http://jsfiddle.net/0781wtqu/
Basically, add a class to the submenus ("submenu" in my example) and hide it through a CSS rule, then add another CSS rule to show the hidden class when hovering
#CustomerMenu ul li:hover > ul.submenu {
display: block;
}

Answer 2

You have to use :hover and style for :hover on outer li
The submenu must be having position absolute and li as relative.
Following link provides help to create menu using css
http://www.wikihow.com/Create-a-Dropdown-Menu-in-HTML-and-CSS
Sample menu for your reference
body {
font-family: 'Lucida Grande', 'Helvetica Neue', Helvetica, Arial, sans-serif;
padding: 20px 50px 150px;
font-size: 13px;
text-align: center;
background: #E3CAA1;
}
ul {
text-align: left;
display: inline;
margin: 0;
padding: 15px 4px 17px 0;
list-style: none;
-webkit-box-shadow: 0 0 5px rgba(0, 0, 0, 0.15);
-moz-box-shadow: 0 0 5px rgba(0, 0, 0, 0.15);
box-shadow: 0 0 5px rgba(0, 0, 0, 0.15);
}
ul li {
font: bold 12px/18px sans-serif;
display: inline-block;
margin-right: -4px;
position: relative;
padding: 15px 20px;
background: #fff;
cursor: pointer;
-webkit-transition: all 0.2s;
-moz-transition: all 0.2s;
-ms-transition: all 0.2s;
-o-transition: all 0.2s;
transition: all 0.2s;
}
ul li:hover {
background: #555;
color: #fff;
}
ul li ul {
padding: 0;
position: absolute;
top: 48px;
left: 0;
width: 150px;
-webkit-box-shadow: none;
-moz-box-shadow: none;
box-shadow: none;
display: none;
opacity: 0;
visibility: hidden;
-webkit-transiton: opacity 0.2s;
-moz-transition: opacity 0.2s;
-ms-transition: opacity 0.2s;
-o-transition: opacity 0.2s;
-transition: opacity 0.2s;
}
ul li ul li {
background: #555;
display: block;
color: #fff;
text-shadow: 0 -1px 0 #000;
}
ul li ul li:hover { background: #666; }
ul li:hover ul {
display: block;
opacity: 1;
visibility: visible;
}
<ul><li>Home</li>
<li>About</li>
<li>
Portfolio
<ul>
<li>Web Design</li>
<li>Web Development</li>
<li>Illustrations</li>
</ul>
</li>
<li>Blog</li>
<li>Contact</li>
</ul>