A little known fact about the LEGEND element is that it is actually required in HTML 4.01 but not in XHTML 1.0. Who'd have thought it? Luckily, I always include one to improve accessibility anyway but you may want to check before closing the FIELDSET group.
The FIELDSET element allows authors to group thematically related controls and labels. Grouping controls makes it easier for users to understand their purpose while simultaneously facilitating tabbing navigation for visual user agents and speech navigatio