Core DOM class extensions that are in many browsers

[Maciej Stachowiak]

While cleaning up some aspects of Safari's DOM bindings for JS, I  
found the following DOM extensions which I think are very widely  
implemented (including at least Mozilla and IE and I think probably  
Opera and Safari). We should consider these strong suggestions for  
things we ought to standardize:

Node:

        Node item(in long index); // and Node is also indexable as  
array

Document (browsers vary as to whether some of these these are on  
Document or HTMLDocument):

        boolean execCommand(in DOMString command,
                            in boolean userInterface,
                            in DOMString value);
        boolean queryCommandEnabled(in DOMString command);
        boolean queryCommandIndeterm(in DOMString command);
        boolean queryCommandState(in DOMString command);
        boolean queryCommandSupported(in DOMString command);
        DOMString queryCommandValue(in DOMString command);
        attribute DOMString dir;
        attribute DOMString lastModified;
        attribute DOMString designMode;

Element (browsers vary as to whether some of these are on Element or  
HTMLElement):

        readonly attribute long offsetLeft;
        readonly attribute long offsetTop;
        readonly attribute long offsetWidth;
        readonly attribute long offsetHeight;
        readonly attribute Element offsetParent;
        readonly attribute long clientWidth;
        readonly attribute long clientHeight;
        attribute long scrollLeft;
        attribute long scrollTop;
        readonly attribute long scrollWidth;
        readonly attribute long scrollHeight;
        void focus();
        void blur();
        void scrollIntoView(in boolean alignWithTop); // optional  
argument
        attribute long tabIndex;

Regards,
Maciej