var bitMap=fl.getDocumentDOM().getTimeline().layers [layLen_num-1].frames[0].elements[0];
fl.trace(bitMap.name);
fl.getDocumentDOM().library.selectItem(bitMap.libraryItem.name);
fl.getDocumentDOM().library.deleteItem();
2022-08-18 17:26:45
var bitMap=fl.getDocumentDOM().getTimeline().layers [layLen_num-1].frames[0].elements[0];
fl.trace(bitMap.name);
fl.getDocumentDOM().library.selectItem(bitMap.libraryItem.name);
fl.getDocumentDOM().library.deleteItem();