remove drag insertion markers or highlighting

[DDD]

Hi,

https://developer.mozilla.org/En/DragDrop/Drag_Operations#dragend
says
-moz-drag-over pseudoclass will be removed automatically when drag
exit.

But when a new dialog opened,. a drag process will be interrupted and
the drag image and highlighting will not be removed.

So I have to remove the insertion markers or highlighting manually.

Any ideas?

Thanks in advance.