private function kill(childObj:String, parentObj:String = ""):void
        //@param childObj:String - pass the variable name of the child movieclip that you want to be removed and nullified
        //@param parentObj:String = "" - pass the variable name of the parrent if need, to avoid exception errors
        {
            if (this[childObj] != null) // if the movieclip exist...
            {
                if (stage.contains(this[childObj])) // ...and is on stage...
                {
                    if (parentObj != "") this[parentObj].removeChild(this[childObj]); // ...if parent mentioned, use parent to remove child from stage.
                    else removeChild(this[childObj]); // if has no parent mentioned, just remove child from stage
                }
                this[childObj] = null; // nullify (kill) movieclip
            }
        }