html登录按钮怎么设置？
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<form>
<input type="text" name="username">
<input type="password" name="password">
<button type="submit">登录</button>
</form>
</body>
</html>
