If (man.hitTest(none)){ Null

Hi is there a simple way to detect if a hit test is null?

I am trying to make something happen if the hit test is called and something else when it does not exist.

    if (man.hitTest(mostache.dude)){
            _root.mostache._x = man._x;
            Caption_Create(true, "HELLO I AM BLAH", this);
                                    }
                                if (man.hitTest(none)){            
                                Caption_Create(false);

cheers :rd: