<!DOCTYPE html>
<html lang="en">
<head>
???<meta charset="UTF-8">
???<title>span</title>
</head>
<body>
???<fieldset>
???????<legend>login</legend>
???????<label for="username">username:</label>
???????<input id="username" type="text" name="xx">
???????<br>
???????<label for="password">password:</label>
???????<input id="password" type="text" name="xx">
???</fieldset>
</body>
</html>
012_fieldset.html
原文地址：https://www.cnblogs.com/liujun5319/p/9657939.html