The fieldset element represents a set of form controls grouped under a common name.
an optional legend element, followed by flow content
A fieldset element must have both a start tag and an end tag.
any element that can contain flow elements
interface HTMLFieldSetElement : HTMLElement { attribute boolean disabled; readonly attribute HTMLFormElement? form; attribute DOMString name; readonly attribute DOMString type; readonly attribute HTMLFormControlsCollection elements; readonly attribute boolean willValidate; readonly attribute ValidityState validity; readonly attribute DOMString validationMessage; boolean checkValidity(); void setCustomValidity(DOMString error); };