下图通过css3动画栈实现了鼠标移上图片，图片发亮的效果。
具体代码如下：
<!DOCTYPE html>
<html >
<head>
<style>
div
{
100px;
height:100px;
background:blue;
}
div:hover,img:hover{animation:shade 5s;
-webkit-animation:shade 5s;
-moz-animation:shade 5s;
-o-animation:shade 5s;
animation:shade 5s;
}
@keyframes shade{
from{opacity:1;}
15%{opacity:0.4;}
to{opacity:1;}
}
@-webkit-keyframes shade{
from{opacity:1;}
15%{opacity:0.4;}
to{opacity:1;}
}
@-moz-keyframes shade{
from{opacity:1;}
15%{opacity:0.4;}
to{opacity:1;}
}
@-o-keyframes shade{
from{opacity:1;}
15%{opacity:0.4;}
to{opacity:1;}
}
</style>
</head>
<body>
<div></div>
<p><img src="http://pica.nipic.com/2007-12-24/20071224112445514_2.jpg"/></p>
</body>
</html>