<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>使用 button 定义按钮</title>
</head>
<body>
    <form action="http://www.baidu.com" method="get">
        <button type="button"><b>提交</b></button><br/>
        <button type="submit"><img sec="./img/3.jpg" alt="图片"></button><br/>
    </form>
</body>
</html>


