fnCheckAncestor = function (oNode, oBreaker) {
			if (oNode == oAncestor) {
				oBreaker.broken = true;
				bIsInSubtree = true;
			}
		}
Checks if the <code>oChild</code> node is inside the subtree with root oAncestor.

@param {object} oAncestor The root of the subtree
@param {object} oChild The child

@returns {boolean} Whether the child is inside the subtree

@private