我的图片边框怎么不显示
<doctype html>
<html>
<head>
<title>无标题文档</title>
<style type="text/css">
img{margin:10px 18px; border:1px solid #bladad;}
</style>
</head>
<body>
<img src="images/U4341P115DT20130218111855.jpg" width="80" height="80"/>
<img src="images/userid87975time20070303135301.jpg" width="80" height="80"/>
<img src="images/userid219491time20100825062814.jpg" width="80" height="80"/>
<img src="images/W020150327349306555358.jpg" width="80" height="80"/>
<img src="images/wKgDs1QMxeXRrF5aAAHOr0Gk3N0791.jpg" width="80" height="80"/>
</body>
</html>
