[Plugin: Front-end Editor] is it possible edits to go to draft again

Hi. i need this very much.
i want my published posts updated to draft status again when they edited via front end editor .

Another words when editors edit their own published posts via front end, their posts should go to draft status again. So only admins can publish their edited posts again after check.
Can this be done with a custom function or hook? May be this can be done with changing form action in post text field when they click save button. I dont know how can be this done (sorry i am not a developer or coder)

Or can this be done with changing some capabilities..??

i need your help.
Thanks