HTML5 การใช้งาน fieldset Tag

<form>
  <fieldset>
    <legend>Personal Information</legend>
    <label for="name">Name:</label>
    <input type="text" id="name" name="name">

    <label for="email">Email:</label>
    <input type="email" id="email" name="email">
  </fieldset>

  <fieldset>
    <legend>Account Details</legend>
    <label for="username">Username:</label>
    <input type="text" id="username" name="username">

    <label for="password">Password:</label>
    <input type="password" id="password" name="password">
  </fieldset>

  <input type="submit" value="Submit">
</form>

<form>
  <fieldset>
    <legend>Billing Address</legend>
    
    <label for="address">Address:</label>
    <input type="text" id="address" name="address">

    <fieldset>
      <legend>Payment Method</legend>
      <label for="creditCard">Credit Card:</label>
      <input type="radio" id="creditCard" name="paymentMethod" value="creditCard">
      
      <label for="paypal">Paypal:</label>
      <input type="radio" id="paypal" name="paymentMethod" value="paypal">
    </fieldset>
    
  </fieldset>

  <input type="submit" value="Submit">
</form>

<form>
  <fieldset>
    <legend>Actions</legend>
    <input type="submit" value="Submit">
    <input type="reset" value="Reset">
  </fieldset>
</form>

<form>
  <fieldset style="border: 2px solid blue;">
    <legend style="color: red;">Contact Us</legend>
    
    <label for="phone">Phone:</label>
    <input type="tel" id="phone" name="phone">

    <label for="email">Email:</label>
    <input type="email" id="email" name="email">
  </fieldset>
</form>