Detect if otherNode is contained by refNode

contains.js

//Detect if otherNode is contained by refNode
function contains(refNode, otherNode) {
	var node = other.Node.parerntNode;
	do {
		if (node === refNode) {
			return true;
		} else {
			node = node.parentNode;
		}
	} while (node !== null);
	return false;
}