pageCount = 0;
	public void copyOf(DocumentImpl other) {	    maxDepth = other.maxDepth;	    childList = null;	    children = 0;	    docType = other.getDoctype();	    treeLevelOrder = other.treeLevelOrder;	    treeLevelStartPoints = other.treeLevelStartPoints;	    internalAddress = -1;	    lastModified = other.getLastModified();	}