Note: The DOM Level 2 HTML module is not backward compatible with the DOM Level 1 HTML module.
Document supports the feature "XML"
as well as "HTML".HTMLDocumentgetElementById is now inherited from
the Document interface [DOM Level 2 Core] where it was
moved.HTMLFrameElementcontentDocument was added.HTMLIFrameElementcontentDocument was added.HTMLInputElementtype is no longer read only.HTMLObjectElementcontentDocument was added.form was removed.HTMLOptionElementdefaultSelected attribute does not
reset the state of the form control.HTMLTextAreaElementdefaultValue attribute does not reset
the contents of the form control.HTMLImageElementlowSrc attribute was removed.border,
height, hspace, width and
vspace were changed from DOMString to
long.HTMLDOMImplementationHTMLDOMImplementation
interface was added to the HTML module.