css图片边框问题
<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<style type="text/css">
img.aaaav{
border-width:12px;
border-color:red}
</style>
<body>
<center>
<img src="QQ.jpg" class="aaaav">
</center>
</body>
</html>
为什么上面代码运行后，图片边框没有任何变化？
