Sets or retrieves the string identifying the object.
HRESULT value = object.put_id( v);HRESULT value = object.get_id(* p);
any alphanumeric string that begins with a letter. The underscore (_) can also be used.
The IHTMLElement::id is an SGML identifier used as the target for hypertext links or for naming particular objects in associated style sheets.
The IHTMLElement::id should be unique throughout the scope of the current document. If a document contains more than one object with the same identifier, the objects are exposed as a collection that can be referenced only in ordinal position.