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1/*
2Ancestry - jquery.ancestry.js
3As discussed in the jQuery Development Google Group.
4Released under the MIT license.
5
6Involved: Michael Geary, Diego Perini, John-David Dalton, John Resig, and Nathan Hammond
7Compiled: Nathan Hammond
8*/
9
10jQuery.comparePosition = function ( element, context) {
11	jQuery.comparePosition = 
12	document.documentElement.compareDocumentPosition ?
13			function ( element, context ) {
14				return !!( element.compareDocumentPosition(context) & 8 );
15			}
16		: document.documentElement.contains ?
17			function ( element, context ) {
18				return element  != context && context.contains(element);
19			}
20		:
21			function ( element, context ) {
22				for ( ; element != context; element = element.parentNode )
23					if ( !element ) return false;
24				return true;
25			};
26	return jQuery.comparePosition( element, context );
27}
28
29jQuery.fn.ancestorOf = function ( context ) {
30	return this.filter(function() {
31		return jQuery.comparePosition( context, this );
32	});
33};
34jQuery.fn.descendantOf = function ( context ) {
35	return this.filter(function() {
36		return jQuery.comparePosition( this, context );
37	});
38};
39
40/*
41Noted here if you wish to add parallel functionality to $()
42
43if ( selector.nodeType ) {
44	// Handle $(DOMElement,	context)
45	if ( context &&	!jQuery.comparePosition( selector, context ) ) {
46		return jQuery( [] );
47	}
48	// Handle $(DOMElement)
49	this[0]	= selector;
50	this.length = 1;
51	return this;
52}
53*/