Problems swapping depths


I’m using

	_root.x +=2;

to make sure my mcs always stay on top when clicked (they are draggable items). However I have 2 other mcs which I want to stay on top of EVERYTHING else regardless of what happens. I’m sure this is possible but I cant seem to make those two mcs stay on top as when the other items are clicked, they just jump to the top. Any ideas?