css3 实现鼠标放到一个div上显示出另一个隐藏的div

<!DOCTYPE html>

<html >

<head>

<meta charset="utf-8"/>

<title>CSS Test Page</title>

<style type="text/css">

*{

margin: 0;

padding: 0;

}

.cent{

background:#0CF; height:200px; width:100px;

}

.cs{

width:100px;

height:200px;

background:#F09;

top:0px;

position:absolute;

opacity: 0;

display: block;

font-size: 12px;

transition: 0.3s;

-webkit-transition: .5s;

-moz-transition: .5s;

}

.cent:hover .cs{

color: #656e73;

opacity: 1;

}

</style>

</head>

<body>

<div class="cent">

This is the cent div

<div class="cs">

<p>this is a cs div</p>

</div>

</div>

</body>

</html>