Fieldset and Legend
The fieldset groups related form elements, while the legend provides a caption for the group.
The <fieldset></fieldset> element is used to group related data in a form.
The <legend></legend> elements defines a caption for <fieldset> element.
<form>
<fieldset>
<legend>Personal Information</legend>
<label for="fname">First Name:</label>
<input type="text" name="fname" id="fname"> <br />
<label for="lname">Last Name:</label>
<input type="text" name="lname" id="lname"> <br />
<input type="submit" name="btnsave" value="Save">
</fieldset>
</form>