How do I destroy an overlapping object

presently i have about 5 sprites in a family, i want to drag and drop any of the members into a particular position, however when i want to drop another of the members such that it overlaps the one that was ther before, i would like the old one to be removed and placed back in its inital position, while the new one dragged takes the position. Pls help with this. a simple capx file is here https://www.dropbox.com/s/uf1kz0kcfqu95zk/overlao%20help.capx

Here is one approach:

https://googledrive.com/host/0B3JLq-yXZ ... help2.capx

Here is another approach:

— and shirokuma, thanks guys, both solutions worked perfectly and i'm progressing with my work. Thanks a lot.