<!DOCTYPE HTML>
<html lang="en-US">
<head>
<title>css实现鼠标悬停时图片加边框效果</title>
<style type="text/css">
body{background:#222;color:#06c;}
em{ font-style:inherit;}
img{background:white;margin:0 5px;width:70px;height:70px;}
img:hover{border:1px red solid;}
.demo2 img{border:1px solid transparent;}
.demo2 img:hover{border:1px red solid;}
.demo3 img:hover{width:68px;height:68px;border:1px solid yellow;}
</style>
</head>
<body>
<div class="demo1">
<img src="/jscss/demoimg/wall_s6.jpg" />
<img src="/jscss/demoimg/wall_s6.jpg" />
<img src="/jscss/demoimg/wall_s6.jpg" />
<img src="/jscss/demoimg/wall_s6.jpg" />
<em>明显看到当img标签在hover的时候由于出现边框导致位移</em>
</div>
<div class="demo2">
<img src="/jscss/demoimg/wall_s6.jpg" />
<img src="/jscss/demoimg/wall_s6.jpg" />
<img src="/jscss/demoimg/wall_s6.jpg" />
<img src="/jscss/demoimg/wall_s6.jpg" />
<em>给每个img添加border:1px solid transparent;世界就和平了</em>
</div>
<div class="demo3">
<img src="/jscss/demoimg/wall_s6.jpg" />
<img src="/jscss/demoimg/wall_s6.jpg" />
<img src="/jscss/demoimg/wall_s6.jpg" />
<img src="/jscss/demoimg/wall_s6.jpg" />
<em>修改width和height,世界继续和平</em>
</div>
</body>
</html>
代码保存打开
1.修改width和height
2.给每个img添加border:1px solid transparent（如果是div或者块元素出现这种情况也可以加，谁出现谁加就对了）
转载http://www.codefans.net/jscss/code/3039.shtml