private Node getSuccessor(Node delNode){
		Node sucsParent=delNode;
		Node sucssr=delNode;
		Node crnt=delNode.rightChld;		//go to right side
		while(crnt!=null){					//Until find node without leftchild
			sucsParent=sucssr;
			sucssr=crnt;
			crnt=crnt.leftChld;				//go to left
		}
		if(sucssr!=delNode.rightChld){
			sucsParent.leftChld=sucssr.rightChld;
			sucssr.rightChld=delNode.rightChld;
		}
		return sucssr;
	}