We would like to know how to show/hide div.
<!DOCTYPE html>
<html>
<head>
<style type='text/css'>
ul li ul {<!-- w w w .j a v a2s .com-->
display: none;
}
ul li:hover ul {
display: block;
}
</style>
</head>
<body>
<ul>
<li><h5>About</h5>
<ul>
<li>a</li>
<li>b</li>
<li>c</li>
</ul></li>
</ul>
</body>
</html>
The code above is rendered as follows: