Updating sizzle for jsdom to github 20120907 version.

sizzle-jsdom.patch

diff --git a/lib/jsdom/selectors/sizzle.js b/lib/jsdom/selectors/sizzle.js
index f8c890c..5870d19 100755
--- a/lib/jsdom/selectors/sizzle.js
+++ b/lib/jsdom/selectors/sizzle.js
@@ -1,982 +1,900 @@
 /*!
  * Sizzle CSS Selector Engine
- *  Copyright 2011, The Dojo Foundation
- *  Released under the MIT, BSD, and GPL Licenses.
- *  More information: http://sizzlejs.com/
+ *  Copyright 2012 jQuery Foundation and other contributors
+ *  Released under the MIT license
+ *  http://sizzlejs.com/
  */
 // Patch for jsdom
-module.exports = function(document){
+module.exports = function( document ) {
+
+var dirruns,
+	cachedruns,
+	assertGetIdNotName,
+	Expr,
+	getText,
+	isXML,
+	contains,
+	compile,
+	sortOrder,
+	hasDuplicate,
 
-var chunker = /((?:\((?:\([^()]+\)|[^()]+)+\)|\[(?:\[[^\[\]]*\]|['"][^'"]*['"]|[^\[\]'"]+)+\]|\\.|[^ >+~,(\[\\]+)+|[>+~])(\s*,\s*)?((?:.|\r|\n)*)/g,
-	expando = "sizcache" + (Math.random() + '').replace('.', ''),
-	done = 0,
-	toString = Object.prototype.toString,
-	hasDuplicate = false,
 	baseHasDuplicate = true,
-	rBackslash = /\\/g,
-	rReturn = /\r\n/g,
-	rNonWord = /\W/;
-
-
-// Here we check if the JavaScript engine is using some sort of
-// optimization where it does not always call our comparision
-// function. If that is the case, discard the hasDuplicate value.
-//   Thus far that includes Google Chrome.
-[0, 0].sort(function() {
-	baseHasDuplicate = false;
-	return 0;
-});
-
-var Sizzle = function( selector, context, results, seed ) {
-	results = results || [];
-	// PATCH for jsdom
-	// context = context || document;
-	// See: https://github.com/tmpvar/jsdom/issues/375
-	context = context || seed[0].ownerDocument;
-	var origContext = context;
-
-	if ( context.nodeType !== 1 && context.nodeType !== 9 ) {
-		return [];
-	}
-
-	if ( !selector || typeof selector !== "string" ) {
-		return results;
-	}
-
-	var m, set, checkSet, extra, ret, cur, pop, i,
-		prune = true,
-		contextXML = Sizzle.isXML( context ),
-		parts = [],
-		soFar = selector;
-
-	// Reset the position of the chunker regexp (start from head)
-	do {
-		chunker.exec( "" );
-		m = chunker.exec( soFar );
-
-		if ( m ) {
-			soFar = m[3];
-
-			parts.push( m[1] );
-
-			if ( m[2] ) {
-				extra = m[3];
-				break;
-			}
-		}
-	} while ( m );
+	strundefined = "undefined",
 
-	if ( parts.length > 1 && origPOS.exec( selector ) ) {
+	expando = ( "sizcache" + Math.random() ).replace( ".", "" ),
 
-		if ( parts.length === 2 && Expr.relative[ parts[0] ] ) {
-			set = posProcess( parts[0] + parts[1], context, seed );
+	// jsdom document = window.document,
+	docElem = document.documentElement,
+	done = 0,
+	slice = [].slice,
+	push = [].push,
 
-		} else {
-			set = Expr.relative[ parts[0] ] ?
-				[ context ] :
-				Sizzle( parts.shift(), context );
+	// Augment a function for special use by Sizzle
+	markFunction = function( fn, value ) {
+		fn[ expando ] = value || true;
+		return fn;
+	},
 
-			while ( parts.length ) {
-				selector = parts.shift();
+	createCache = function() {
+		var cache = {},
+			keys = [];
 
-				if ( Expr.relative[ selector ] ) {
-					selector += parts.shift();
-				}
-
-				set = posProcess( selector, set, seed );
+		return markFunction(function( key, value ) {
+			// Only keep the most recent entries
+			if ( keys.push( key ) > Expr.cacheLength ) {
+				delete cache[ keys.shift() ];
 			}
-		}
-
-	} else {
-		// Take a shortcut and set the context if the root selector is an ID
-		// (but not if it'll be faster if the inner selector is an ID)
-		if ( !seed && parts.length > 1 && context.nodeType === 9 && !contextXML &&
-				Expr.match.ID.test(parts[0]) && !Expr.match.ID.test(parts[parts.length - 1]) ) {
-
-			ret = Sizzle.find( parts.shift(), context, contextXML );
-			context = ret.expr ?
-				Sizzle.filter( ret.expr, ret.set )[0] :
-				ret.set[0];
-		}
-
-		if ( context ) {
-			ret = seed ?
-				{ expr: parts.pop(), set: makeArray(seed) } :
-				Sizzle.find( parts.pop(), parts.length === 1 && (parts[0] === "~" || parts[0] === "+") && context.parentNode ? context.parentNode : context, contextXML );
-
-			set = ret.expr ?
-				Sizzle.filter( ret.expr, ret.set ) :
-				ret.set;
 
-			if ( parts.length > 0 ) {
-				checkSet = makeArray( set );
-
-			} else {
-				prune = false;
-			}
+			return (cache[ key ] = value);
+		}, cache );
+	},
 
-			while ( parts.length ) {
-				cur = parts.pop();
-				pop = cur;
+	classCache = createCache(),
+	tokenCache = createCache(),
+	compilerCache = createCache(),
+
+	// Regex
+
+	// Whitespace characters http://www.w3.org/TR/css3-selectors/#whitespace
+	whitespace = "[\\x20\\t\\r\\n\\f]",
+	// http://www.w3.org/TR/css3-syntax/#characters
+	characterEncoding = "(?:\\\\.|[-\\w]|[^\\x00-\\xa0])+",
+
+	// Loosely modeled on CSS identifier characters
+	// An unquoted value should be a CSS identifier (http://www.w3.org/TR/css3-selectors/#attribute-selectors)
+	// Proper syntax: http://www.w3.org/TR/CSS21/syndata.html#value-def-identifier
+	identifier = characterEncoding.replace( "w", "w#" ),
+
+	// Acceptable operators http://www.w3.org/TR/selectors/#attribute-selectors
+	operators = "([*^$|!~]?=)",
+	attributes = "\\[" + whitespace + "*(" + characterEncoding + ")" + whitespace +
+		"*(?:" + operators + whitespace + "*(?:(['\"])((?:\\\\.|[^\\\\])*?)\\3|(" + identifier + ")|)|)" + whitespace + "*\\]",
+
+	// Prefer arguments not in parens/brackets,
+	//   then attribute selectors and non-pseudos (denoted by :),
+	//   then anything else
+	// These preferences are here to reduce the number of selectors
+	//   needing tokenize in the PSEUDO preFilter
+	pseudos = ":(" + characterEncoding + ")(?:\\((?:(['\"])((?:\\\\.|[^\\\\])*?)\\2|([^()[\\]]*|(?:(?:" + attributes + ")|[^:]|\\\\.)*|.*))\\)|)",
+
+	// For matchExpr.POS and matchExpr.needsContext
+	pos = ":(nth|eq|gt|lt|first|last|even|odd)(?:\\(((?:-\\d)?\\d*)\\)|)(?=[^-]|$)",
+
+	// Leading and non-escaped trailing whitespace, capturing some non-whitespace characters preceding the latter
+	rtrim = new RegExp( "^" + whitespace + "+|((?:^|[^\\\\])(?:\\\\.)*)" + whitespace + "+$", "g" ),
+
+	rcomma = new RegExp( "^" + whitespace + "*," + whitespace + "*" ),
+	rcombinators = new RegExp( "^" + whitespace + "*([\\x20\\t\\r\\n\\f>+~])" + whitespace + "*" ),
+	rpseudo = new RegExp( pseudos ),
+
+	// Easily-parseable/retrievable ID or TAG or CLASS selectors
+	rquickExpr = /^(?:#([\w\-]+)|(\w+)|\.([\w\-]+))$/,
+
+	rnot = /^:not/,
+	rsibling = /[\x20\t\r\n\f]*[+~]/,
+	rendsWithNot = /:not\($/,
+
+	rheader = /h\d/i,
+	rinputs = /input|select|textarea|button/i,
+
+	rbackslash = /\\(?!\\)/g,
+
+	matchExpr = {
+		"ID": new RegExp( "^#(" + characterEncoding + ")" ),
+		"CLASS": new RegExp( "^\\.(" + characterEncoding + ")" ),
+		"NAME": new RegExp( "^\\[name=['\"]?(" + characterEncoding + ")['\"]?\\]" ),
+		"TAG": new RegExp( "^(" + characterEncoding.replace( "w", "w*" ) + ")" ),
+		"ATTR": new RegExp( "^" + attributes ),
+		"PSEUDO": new RegExp( "^" + pseudos ),
+		"CHILD": new RegExp( "^:(only|nth|last|first)-child(?:\\(" + whitespace +
+			"*(even|odd|(([+-]|)(\\d*)n|)" + whitespace + "*(?:([+-]|)" + whitespace +
+			"*(\\d+)|))" + whitespace + "*\\)|)", "i" ),
+		"POS": new RegExp( pos, "ig" ),
+		// For use in libraries implementing .is()
+		"needsContext": new RegExp( "^" + whitespace + "*[>+~]|" + pos, "i" )
+	},
 
-				if ( !Expr.relative[ cur ] ) {
-					cur = "";
-				} else {
-					pop = parts.pop();
-				}
+	// Support
 
-				if ( pop == null ) {
-					pop = context;
-				}
+	// Used for testing something on an element
+	assert = function( fn ) {
+		var div = document.createElement("div");
 
-				Expr.relative[ cur ]( checkSet, pop, contextXML );
-			}
-
-		} else {
-			checkSet = parts = [];
+		try {
+			return fn( div );
+		} catch (e) {
+			return false;
+		} finally {
+			// release memory in IE
+			div = null;
 		}
-	}
-
-	if ( !checkSet ) {
-		checkSet = set;
-	}
-
-	if ( !checkSet ) {
-		Sizzle.error( cur || selector );
-	}
-
-	if ( toString.call(checkSet) === "[object Array]" ) {
-		if ( !prune ) {
-			results.push.apply( results, checkSet );
-
-		} else if ( context && context.nodeType === 1 ) {
-			for ( i = 0; checkSet[i] != null; i++ ) {
-				if ( checkSet[i] && (checkSet[i] === true || checkSet[i].nodeType === 1 && Sizzle.contains(context, checkSet[i])) ) {
-					results.push( set[i] );
-				}
-			}
+	},
 
-		} else {
-			for ( i = 0; checkSet[i] != null; i++ ) {
-				if ( checkSet[i] && checkSet[i].nodeType === 1 ) {
-					results.push( set[i] );
-				}
-			}
+	// Check if getElementsByTagName("*") returns only elements
+	assertTagNameNoComments = assert(function( div ) {
+		div.appendChild( document.createComment("") );
+		return !div.getElementsByTagName("*").length;
+	}),
+
+	// Check if getAttribute returns normalized href attributes
+	assertHrefNotNormalized = assert(function( div ) {
+		div.innerHTML = "<a href='#'></a>";
+		return div.firstChild && typeof div.firstChild.getAttribute !== strundefined &&
+			div.firstChild.getAttribute("href") === "#";
+	}),
+
+	// Check if attributes should be retrieved by attribute nodes
+	assertAttributes = assert(function( div ) {
+		div.innerHTML = "<select></select>";
+		var type = typeof div.lastChild.getAttribute("multiple");
+		// IE8 returns a string for some attributes even when not present
+		return type !== "boolean" && type !== "string";
+	}),
+
+	// Check if getElementsByClassName can be trusted
+	assertUsableClassName = assert(function( div ) {
+		// Opera can't find a second classname (in 9.6)
+		div.innerHTML = "<div class='hidden e'></div><div class='hidden'></div>";
+		if ( !div.getElementsByClassName || !div.getElementsByClassName("e").length ) {
+			return false;
 		}
 
-	} else {
-		makeArray( checkSet, results );
-	}
-
-	if ( extra ) {
-		Sizzle( extra, origContext, results, seed );
-		Sizzle.uniqueSort( results );
-	}
-
-	return results;
-};
-
-Sizzle.uniqueSort = function( results ) {
-	if ( sortOrder ) {
-		hasDuplicate = baseHasDuplicate;
-		results.sort( sortOrder );
-
-		if ( hasDuplicate ) {
-			for ( var i = 1; i < results.length; i++ ) {
-				if ( results[i] === results[ i - 1 ] ) {
-					results.splice( i--, 1 );
-				}
-			}
+		// Safari 3.2 caches class attributes and doesn't catch changes
+		div.lastChild.className = "e";
+		return div.getElementsByClassName("e").length === 2;
+	}),
+
+	// Check if getElementById returns elements by name
+	// Check if getElementsByName privileges form controls or returns elements by ID
+	assertUsableName = assert(function( div ) {
+		// Inject content
+		div.id = expando + 0;
+		div.innerHTML = "<a name='" + expando + "'></a><div name='" + expando + "'></div>";
+		docElem.insertBefore( div, docElem.firstChild );
+
+		// Test
+		var pass = document.getElementsByName &&
+			// buggy browsers will return fewer than the correct 2
+			document.getElementsByName( expando ).length === 2 +
+			// buggy browsers will return more than the correct 0
+			document.getElementsByName( expando + 0 ).length;
+		assertGetIdNotName = !document.getElementById( expando );
+
+		// Cleanup
+		docElem.removeChild( div );
+
+		return pass;
+	});
+
+// If slice is not available, provide a backup
+try {
+	slice.call( docElem.childNodes, 0 )[0].nodeType;
+} catch ( e ) {
+	slice = function( i ) {
+		var elem, results = [];
+		for ( ; (elem = this[i]); i++ ) {
+			results.push( elem );
 		}
-	}
-
-	return results;
-};
-
-Sizzle.matches = function( expr, set ) {
-	return Sizzle( expr, null, null, set );
-};
-
-Sizzle.matchesSelector = function( node, expr ) {
-	return Sizzle( expr, null, null, [node] ).length > 0;
-};
+		return results;
+	};
+}
 
-Sizzle.find = function( expr, context, isXML ) {
-	var set, i, len, match, type, left;
+function Sizzle( selector, context, results, seed ) {
+	results = results || [];
+	// PATCH for jsdom
+	// context = context || document;
+	// See: https://github.com/tmpvar/jsdom/issues/375
+	context = context || seed[0].ownerDocument;
+	var match, elem, xml, m,
+		nodeType = context.nodeType;
 
-	if ( !expr ) {
+	if ( nodeType !== 1 && nodeType !== 9 ) {
 		return [];
 	}
 
-	for ( i = 0, len = Expr.order.length; i < len; i++ ) {
-		type = Expr.order[i];
-
-		if ( (match = Expr.leftMatch[ type ].exec( expr )) ) {
-			left = match[1];
-			match.splice( 1, 1 );
-
-			if ( left.substr( left.length - 1 ) !== "\\" ) {
-				match[1] = (match[1] || "").replace( rBackslash, "" );
-				set = Expr.find[ type ]( match, context, isXML );
-
-				if ( set != null ) {
-					expr = expr.replace( Expr.match[ type ], "" );
-					break;
-				}
-			}
-		}
-	}
-
-	if ( !set ) {
-		set = typeof context.getElementsByTagName !== "undefined" ?
-			context.getElementsByTagName( "*" ) :
-			[];
+	if ( !selector || typeof selector !== "string" ) {
+		return results;
 	}
 
-	return { set: set, expr: expr };
-};
-
-Sizzle.filter = function( expr, set, inplace, not ) {
-	var match, anyFound,
-		type, found, item, filter, left,
-		i, pass,
-		old = expr,
-		result = [],
-		curLoop = set,
-		isXMLFilter = set && set[0] && Sizzle.isXML( set[0] );
-
-	while ( expr && set.length ) {
-		for ( type in Expr.filter ) {
-			if ( (match = Expr.leftMatch[ type ].exec( expr )) != null && match[2] ) {
-				filter = Expr.filter[ type ];
-				left = match[1];
-
-				anyFound = false;
-
-				match.splice(1,1);
-
-				if ( left.substr( left.length - 1 ) === "\\" ) {
-					continue;
-				}
-
-				if ( curLoop === result ) {
-					result = [];
-				}
-
-				if ( Expr.preFilter[ type ] ) {
-					match = Expr.preFilter[ type ]( match, curLoop, inplace, result, not, isXMLFilter );
-
-					if ( !match ) {
-						anyFound = found = true;
-
-					} else if ( match === true ) {
-						continue;
-					}
-				}
-
-				if ( match ) {
-					for ( i = 0; (item = curLoop[i]) != null; i++ ) {
-						if ( item ) {
-							found = filter( item, match, i, curLoop );
-							pass = not ^ found;
-
-							if ( inplace && found != null ) {
-								if ( pass ) {
-									anyFound = true;
-
-								} else {
-									curLoop[i] = false;
-								}
-
-							} else if ( pass ) {
-								result.push( item );
-								anyFound = true;
-							}
+	xml = isXML( context );
+
+	if ( !xml && !seed ) {
+		if ( (match = rquickExpr.exec( selector )) ) {
+			// Speed-up: Sizzle("#ID")
+			if ( (m = match[1]) ) {
+				if ( nodeType === 9 ) {
+					elem = context.getElementById( m );
+					// Check parentNode to catch when Blackberry 4.6 returns
+					// nodes that are no longer in the document #6963
+					if ( elem && elem.parentNode ) {
+						// Handle the case where IE, Opera, and Webkit return items
+						// by name instead of ID
+						if ( elem.id === m ) {
+							results.push( elem );
+							return results;
 						}
+					} else {
+						return results;
 					}
-				}
-
-				if ( found !== undefined ) {
-					if ( !inplace ) {
-						curLoop = result;
-					}
-
-					expr = expr.replace( Expr.match[ type ], "" );
-
-					if ( !anyFound ) {
-						return [];
+				} else {
+					// Context is not a document
+					if ( context.ownerDocument && (elem = context.ownerDocument.getElementById( m )) &&
+						contains( context, elem ) && elem.id === m ) {
+						results.push( elem );
+						return results;
 					}
-
-					break;
 				}
-			}
-		}
 
-		// Improper expression
-		if ( expr === old ) {
-			if ( anyFound == null ) {
-				Sizzle.error( expr );
+			// Speed-up: Sizzle("TAG")
+			} else if ( match[2] ) {
+				push.apply( results, slice.call(context.getElementsByTagName( selector ), 0) );
+				return results;
 
-			} else {
-				break;
+			// Speed-up: Sizzle(".CLASS")
+			} else if ( (m = match[3]) && assertUsableClassName && context.getElementsByClassName ) {
+				push.apply( results, slice.call(context.getElementsByClassName( m ), 0) );
+				return results;
 			}
 		}
-
-		old = expr;
 	}
 
-	return curLoop;
+	// All others
+	return select( selector, context, results, seed, xml );
+}
+
+Sizzle.matches = function( expr, elements ) {
+	return Sizzle( expr, null, null, elements );
 };
 
-Sizzle.error = function( msg ) {
-	throw new Error( "Syntax error, unrecognized expression: " + msg );
+Sizzle.matchesSelector = function( elem, expr ) {
+	return Sizzle( expr, null, null, [ elem ] ).length > 0;
 };
 
+// Returns a function to use in pseudos for input types
+function createInputPseudo( type ) {
+	return function( elem ) {
+		var name = elem.nodeName.toLowerCase();
+		return name === "input" && elem.type === type;
+	};
+}
+
+// Returns a function to use in pseudos for buttons
+function createButtonPseudo( type ) {
+	return function( elem ) {
+		var name = elem.nodeName.toLowerCase();
+		return (name === "input" || name === "button") && elem.type === type;
+	};
+}
+
 /**
- * Utility function for retreiving the text value of an array of DOM nodes
+ * Utility function for retrieving the text value of an array of DOM nodes
  * @param {Array|Element} elem
  */
-var getText = Sizzle.getText = function( elem ) {
-    var i, node,
-		nodeType = elem.nodeType,
-		ret = "";
+getText = Sizzle.getText = function( elem ) {
+	var node,
+		ret = "",
+		i = 0,
+		nodeType = elem.nodeType;
 
 	if ( nodeType ) {
 		if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
-			// Use textContent || innerText for elements
-			if ( typeof elem.textContent === 'string' ) {
+			// Use textContent for elements
+			// innerText usage removed for consistency of new lines (see #11153)
+			if ( typeof elem.textContent === "string" ) {
 				return elem.textContent;
-			} else if ( typeof elem.innerText === 'string' ) {
-				// Replace IE's carriage returns
-				return elem.innerText.replace( rReturn, '' );
 			} else {
-				// Traverse it's children
-				for ( elem = elem.firstChild; elem; elem = elem.nextSibling) {
+				// Traverse its children
+				for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
 					ret += getText( elem );
 				}
 			}
 		} else if ( nodeType === 3 || nodeType === 4 ) {
 			return elem.nodeValue;
 		}
+		// Do not include comment or processing instruction nodes
 	} else {
 
 		// If no nodeType, this is expected to be an array
-		for ( i = 0; (node = elem[i]); i++ ) {
+		for ( ; (node = elem[i]); i++ ) {
 			// Do not traverse comment nodes
-			if ( node.nodeType !== 8 ) {
-				ret += getText( node );
-			}
+			ret += getText( node );
 		}
 	}
 	return ret;
 };
 
-var Expr = Sizzle.selectors = {
-	order: [ "ID", "NAME", "TAG" ],
-
-	match: {
-		ID: /#((?:[\w\u00c0-\uFFFF\-]|\\.)+)/,
-		CLASS: /\.((?:[\w\u00c0-\uFFFF\-]|\\.)+)/,
-		NAME: /\[name=['"]*((?:[\w\u00c0-\uFFFF\-]|\\.)+)['"]*\]/,
-		ATTR: /\[\s*((?:[\w\u00c0-\uFFFF\-]|\\.)+)\s*(?:(\S?=)\s*(?:(['"])(.*?)\3|(#?(?:[\w\u00c0-\uFFFF\-]|\\.)*)|)|)\s*\]/,
-		TAG: /^((?:[\w\u00c0-\uFFFF\*\-]|\\.)+)/,
-		CHILD: /:(only|nth|last|first)-child(?:\(\s*(even|odd|(?:[+\-]?\d+|(?:[+\-]?\d*)?n\s*(?:[+\-]\s*\d+)?))\s*\))?/,
-		POS: /:(nth|eq|gt|lt|first|last|even|odd)(?:\((\d*)\))?(?=[^\-]|$)/,
-		PSEUDO: /:((?:[\w\u00c0-\uFFFF\-]|\\.)+)(?:\((['"]?)((?:\([^\)]+\)|[^\(\)]*)+)\2\))?/
-	},
-
-	leftMatch: {},
-
-	attrMap: {
-		"class": "className",
-		"for": "htmlFor"
-	},
+isXML = Sizzle.isXML = function isXML( elem ) {
+	// documentElement is verified for cases where it doesn't yet exist
+	// (such as loading iframes in IE - #4833)
+	var documentElement = elem && (elem.ownerDocument || elem).documentElement;
+	return documentElement ? documentElement.nodeName !== "HTML" : false;
+};
 
-	attrHandle: {
-		href: function( elem ) {
-			return elem.getAttribute( "href" );
-		},
-		type: function( elem ) {
-			return elem.getAttribute( "type" );
+// Element contains another
+contains = Sizzle.contains = docElem.contains ?
+	function( a, b ) {
+		var adown = a.nodeType === 9 ? a.documentElement : a,
+			bup = b && b.parentNode;
+		return a === bup || !!( bup && bup.nodeType === 1 && adown.contains && adown.contains(bup) );
+	} :
+	docElem.compareDocumentPosition ?
+	function( a, b ) {
+		return b && !!( a.compareDocumentPosition( b ) & 16 );
+	} :
+	function( a, b ) {
+		while ( (b = b.parentNode) ) {
+			if ( b === a ) {
+				return true;
+			}
 		}
-	},
+		return false;
+	};
 
-	relative: {
-		"+": function(checkSet, part){
-			var isPartStr = typeof part === "string",
-				isTag = isPartStr && !rNonWord.test( part ),
-				isPartStrNotTag = isPartStr && !isTag;
+Sizzle.attr = function( elem, name ) {
+	var attr,
+		xml = isXML( elem );
 
-			if ( isTag ) {
-				part = part.toLowerCase();
-			}
+	if ( !xml ) {
+		name = name.toLowerCase();
+	}
+	if ( Expr.attrHandle[ name ] ) {
+		return Expr.attrHandle[ name ]( elem );
+	}
+	if ( assertAttributes || xml ) {
+		return elem.getAttribute( name );
+	}
+	attr = elem.getAttributeNode( name );
+	return attr ?
+		typeof elem[ name ] === "boolean" ?
+			elem[ name ] ? name : null :
+			attr.specified ? attr.value : null :
+		null;
+};
 
-			for ( var i = 0, l = checkSet.length, elem; i < l; i++ ) {
-				if ( (elem = checkSet[i]) ) {
-					while ( (elem = elem.previousSibling) && elem.nodeType !== 1 ) {}
+Expr = Sizzle.selectors = {
 
-					checkSet[i] = isPartStrNotTag || elem && elem.nodeName.toLowerCase() === part ?
-						elem || false :
-						elem === part;
-				}
-			}
+	// Can be adjusted by the user
+	cacheLength: 50,
 
-			if ( isPartStrNotTag ) {
-				Sizzle.filter( part, checkSet, true );
-			}
-		},
+	createPseudo: markFunction,
 
-		">": function( checkSet, part ) {
-			var elem,
-				isPartStr = typeof part === "string",
-				i = 0,
-				l = checkSet.length;
+	match: matchExpr,
 
-			if ( isPartStr && !rNonWord.test( part ) ) {
-				part = part.toLowerCase();
+	order: new RegExp( "ID|TAG" +
+		(assertUsableName ? "|NAME" : "") +
+		(assertUsableClassName ? "|CLASS" : "")
+	),
 
-				for ( ; i < l; i++ ) {
-					elem = checkSet[i];
+	// IE6/7 return a modified href
+	attrHandle: assertHrefNotNormalized ?
+		{} :
+		{
+			"href": function( elem ) {
+				return elem.getAttribute( "href", 2 );
+			},
+			"type": function( elem ) {
+				return elem.getAttribute("type");
+			}
+		},
 
-					if ( elem ) {
-						var parent = elem.parentNode;
-						checkSet[i] = parent.nodeName.toLowerCase() === part ? parent : false;
-					}
+	find: {
+		"ID": assertGetIdNotName ?
+			function( id, context, xml ) {
+				if ( typeof context.getElementById !== strundefined && !xml ) {
+					var m = context.getElementById( id );
+					// Check parentNode to catch when Blackberry 4.6 returns
+					// nodes that are no longer in the document #6963
+					return m && m.parentNode ? [m] : [];
 				}
-
-			} else {
-				for ( ; i < l; i++ ) {
-					elem = checkSet[i];
-
-					if ( elem ) {
-						checkSet[i] = isPartStr ?
-							elem.parentNode :
-							elem.parentNode === part;
-					}
+			} :
+			function( id, context, xml ) {
+				if ( typeof context.getElementById !== strundefined && !xml ) {
+					var m = context.getElementById( id );
+
+					return m ?
+						m.id === id || typeof m.getAttributeNode !== strundefined && m.getAttributeNode("id").value === id ?
+							[m] :
+							undefined :
+						[];
 				}
+			},
 
-				if ( isPartStr ) {
-					Sizzle.filter( part, checkSet, true );
+		"TAG": assertTagNameNoComments ?
+			function( tag, context ) {
+				if ( typeof context.getElementsByTagName !== strundefined ) {
+					return context.getElementsByTagName( tag );
 				}
-			}
-		},
+			} :
+			function( tag, context ) {
+				var results = context.getElementsByTagName( tag );
+
+				// Filter out possible comments
+				if ( tag === "*" ) {
+					var elem,
+						tmp = [],
+						i = 0;
+
+					for ( ; (elem = results[i]); i++ ) {
+						if ( elem.nodeType === 1 ) {
+							tmp.push( elem );
+						}
+					}
 
-		"": function(checkSet, part, isXML){
-			var nodeCheck,
-				doneName = done++,
-				checkFn = dirCheck;
+					return tmp;
+				}
+				return results;
+			},
 
-			if ( typeof part === "string" && !rNonWord.test( part ) ) {
-				part = part.toLowerCase();
-				nodeCheck = part;
-				checkFn = dirNodeCheck;
+		"NAME": function( tag, context ) {
+			if ( typeof context.getElementsByName !== strundefined ) {
+				return context.getElementsByName( name );
 			}
-
-			checkFn( "parentNode", part, doneName, checkSet, nodeCheck, isXML );
 		},
 
-		"~": function( checkSet, part, isXML ) {
-			var nodeCheck,
-				doneName = done++,
-				checkFn = dirCheck;
-
-			if ( typeof part === "string" && !rNonWord.test( part ) ) {
-				part = part.toLowerCase();
-				nodeCheck = part;
-				checkFn = dirNodeCheck;
+		"CLASS": function( className, context, xml ) {
+			if ( typeof context.getElementsByClassName !== strundefined && !xml ) {
+				return context.getElementsByClassName( className );
 			}
-
-			checkFn( "previousSibling", part, doneName, checkSet, nodeCheck, isXML );
 		}
 	},
 
-	find: {
-		ID: function( match, context, isXML ) {
-			if ( typeof context.getElementById !== "undefined" && !isXML ) {
-				var m = context.getElementById(match[1]);
-				// Check parentNode to catch when Blackberry 4.6 returns
-				// nodes that are no longer in the document #6963
-				return m && m.parentNode ? [m] : [];
-			}
-		},
-
-		NAME: function( match, context ) {
-			if ( typeof context.getElementsByName !== "undefined" ) {
-				var ret = [],
-					results = context.getElementsByName( match[1] );
-
-				for ( var i = 0, l = results.length; i < l; i++ ) {
-					if ( results[i].getAttribute("name") === match[1] ) {
-						ret.push( results[i] );
-					}
-				}
-
-				return ret.length === 0 ? null : ret;
-			}
-		},
-
-		TAG: function( match, context ) {
-			if ( typeof context.getElementsByTagName !== "undefined" ) {
-				return context.getElementsByTagName( match[1] );
-			}
-		}
+	relative: {
+		">": { dir: "parentNode", first: true },
+		" ": { dir: "parentNode" },
+		"+": { dir: "previousSibling", first: true },
+		"~": { dir: "previousSibling" }
 	},
-	preFilter: {
-		CLASS: function( match, curLoop, inplace, result, not, isXML ) {
-			match = " " + match[1].replace( rBackslash, "" ) + " ";
 
-			if ( isXML ) {
-				return match;
-			}
+	preFilter: {
+		"ATTR": function( match ) {
+			match[1] = match[1].replace( rbackslash, "" );
 
-			for ( var i = 0, elem; (elem = curLoop[i]) != null; i++ ) {
-				if ( elem ) {
-					if ( not ^ (elem.className && (" " + elem.className + " ").replace(/[\t\n\r]/g, " ").indexOf(match) >= 0) ) {
-						if ( !inplace ) {
-							result.push( elem );
-						}
+			// Move the given value to match[3] whether quoted or unquoted
+			match[3] = ( match[4] || match[5] || "" ).replace( rbackslash, "" );
 
-					} else if ( inplace ) {
-						curLoop[i] = false;
-					}
-				}
+			if ( match[2] === "~=" ) {
+				match[3] = " " + match[3] + " ";
 			}
 
-			return false;
+			return match.slice( 0, 4 );
 		},
 
-		ID: function( match ) {
-			return match[1].replace( rBackslash, "" );
-		},
+		"CHILD": function( match ) {
+			/* matches from matchExpr.CHILD
+				1 type (only|nth|...)
+				2 argument (even|odd|\d*|\d*n([+-]\d+)?|...)
+				3 xn-component of xn+y argument ([+-]?\d*n|)
+				4 sign of xn-component
+				5 x of xn-component
+				6 sign of y-component
+				7 y of y-component
+			*/
+			match[1] = match[1].toLowerCase();
 
-		TAG: function( match, curLoop ) {
-			return match[1].replace( rBackslash, "" ).toLowerCase();
-		},
-
-		CHILD: function( match ) {
 			if ( match[1] === "nth" ) {
+				// nth-child requires argument
 				if ( !match[2] ) {
 					Sizzle.error( match[0] );
 				}
 
-				match[2] = match[2].replace(/^\+|\s*/g, '');
-
-				// parse equations like 'even', 'odd', '5', '2n', '3n+2', '4n-1', '-n+6'
-				var test = /(-?)(\d*)(?:n([+\-]?\d*))?/.exec(
-					match[2] === "even" && "2n" || match[2] === "odd" && "2n+1" ||
-					!/\D/.test( match[2] ) && "0n+" + match[2] || match[2]);
+				// numeric x and y parameters for Expr.filter.CHILD
+				// remember that false/true cast respectively to 0/1
+				match[3] = +( match[3] ? match[4] + (match[5] || 1) : 2 * ( match[2] === "even" || match[2] === "odd" ) );
+				match[4] = +( ( match[6] + match[7] ) || match[2] === "odd" );
 
-				// calculate the numbers (first)n+(last) including if they are negative
-				match[2] = (test[1] + (test[2] || 1)) - 0;
-				match[3] = test[3] - 0;
-			}
-			else if ( match[2] ) {
+			// other types prohibit arguments
+			} else if ( match[2] ) {
 				Sizzle.error( match[0] );
 			}
 
-			// TODO: Move to normal caching system
-			match[0] = done++;
-
 			return match;
 		},
 
-		ATTR: function( match, curLoop, inplace, result, not, isXML ) {
-			var name = match[1] = match[1].replace( rBackslash, "" );
+		"PSEUDO": function( match, context, xml ) {
+			var unquoted, excess;
+			if ( matchExpr["CHILD"].test( match[0] ) ) {
+				return null;
+			}
 
-			if ( !isXML && Expr.attrMap[name] ) {
-				match[1] = Expr.attrMap[name];
+			if ( match[3] ) {
+				match[2] = match[3];
+			} else if ( (unquoted = match[4]) ) {
+				// Only check arguments that contain a pseudo
+				if ( rpseudo.test(unquoted) &&
+					// Get excess from tokenize (recursively)
+					(excess = tokenize( unquoted, context, xml, true )) &&
+					// advance to the next closing parenthesis
+					(excess = unquoted.indexOf( ")", unquoted.length - excess ) - unquoted.length) ) {
+
+					// excess is a negative index
+					unquoted = unquoted.slice( 0, excess );
+					match[0] = match[0].slice( 0, excess );
+				}
+				match[2] = unquoted;
 			}
 
-			// Handle if an un-quoted value was used
-			match[4] = ( match[4] || match[5] || "" ).replace( rBackslash, "" );
+			// Return only captures needed by the pseudo filter method (type and argument)
+			return match.slice( 0, 3 );
+		}
+	},
 
-			if ( match[2] === "~=" ) {
-				match[4] = " " + match[4] + " ";
+	filter: {
+		"ID": assertGetIdNotName ?
+			function( id ) {
+				id = id.replace( rbackslash, "" );
+				return function( elem ) {
+					return elem.getAttribute("id") === id;
+				};
+			} :
+			function( id ) {
+				id = id.replace( rbackslash, "" );
+				return function( elem ) {
+					var node = typeof elem.getAttributeNode !== strundefined && elem.getAttributeNode("id");
+					return node && node.value === id;
+				};
+			},
+
+		"TAG": function( nodeName ) {
+			if ( nodeName === "*" ) {
+				return function() { return true; };
 			}
+			nodeName = nodeName.replace( rbackslash, "" ).toLowerCase();
 
-			return match;
+			return function( elem ) {
+				return elem.nodeName && elem.nodeName.toLowerCase() === nodeName;
+			};
 		},
 
-		PSEUDO: function( match, curLoop, inplace, result, not ) {
-			if ( match[1] === "not" ) {
-				// If we're dealing with a complex expression, or a simple one
-				if ( ( chunker.exec(match[3]) || "" ).length > 1 || /^\w/.test(match[3]) ) {
-					match[3] = Sizzle(match[3], null, null, curLoop);
+		"CLASS": function( className ) {
+			var pattern = classCache[ expando ][ className ];
+			if ( !pattern ) {
+				pattern = classCache( className, new RegExp("(^|" + whitespace + ")" + className + "(" + whitespace + "|$)") );
+			}
+			return function( elem ) {
+				return pattern.test( elem.className || (typeof elem.getAttribute !== strundefined && elem.getAttribute("class")) || "" );
+			};
+		},
 
-				} else {
-					var ret = Sizzle.filter(match[3], curLoop, inplace, true ^ not);
+		"ATTR": function( name, operator, check ) {
+			if ( !operator ) {
+				return function( elem ) {
+					return Sizzle.attr( elem, name ) != null;
+				};
+			}
 
-					if ( !inplace ) {
-						result.push.apply( result, ret );
-					}
+			return function( elem ) {
+				var result = Sizzle.attr( elem, name ),
+					value = result + "";
 
-					return false;
+				if ( result == null ) {
+					return operator === "!=";
 				}
 
-			} else if ( Expr.match.POS.test( match[0] ) || Expr.match.CHILD.test( match[0] ) ) {
-				return true;
-			}
-
-			return match;
+				switch ( operator ) {
+					case "=":
+						return value === check;
+					case "!=":
+						return value !== check;
+					case "^=":
+						return check && value.indexOf( check ) === 0;
+					case "*=":
+						return check && value.indexOf( check ) > -1;
+					case "$=":
+						return check && value.substr( value.length - check.length ) === check;
+					case "~=":
+						return ( " " + value + " " ).indexOf( check ) > -1;
+					case "|=":
+						return value === check || value.substr( 0, check.length + 1 ) === check + "-";
+				}
+			};
 		},
 
-		POS: function( match ) {
-			match.unshift( true );
+		"CHILD": function( type, argument, first, last ) {
 
-			return match;
-		}
-	},
+			if ( type === "nth" ) {
+				var doneName = done++;
 
-	filters: {
-		enabled: function( elem ) {
-			return elem.disabled === false && elem.type !== "hidden";
-		},
+				return function( elem ) {
+					var parent, diff,
+						count = 0,
+						node = elem;
 
-		disabled: function( elem ) {
-			return elem.disabled === true;
-		},
-
-		checked: function( elem ) {
-			return elem.checked === true;
-		},
-
-		selected: function( elem ) {
-			// Accessing this property makes selected-by-default
-			// options in Safari work properly
-			if ( elem.parentNode ) {
-				elem.parentNode.selectedIndex;
-			}
+					if ( first === 1 && last === 0 ) {
+						return true;
+					}
 
-			return elem.selected === true;
-		},
+					parent = elem.parentNode;
 
-		parent: function( elem ) {
-			return !!elem.firstChild;
-		},
+					if ( parent && (parent[ expando ] !== doneName || !elem.sizset) ) {
+						for ( node = parent.firstChild; node; node = node.nextSibling ) {
+							if ( node.nodeType === 1 ) {
+								node.sizset = ++count;
+								if ( node === elem ) {
+									break;
+								}
+							}
+						}
 
-		empty: function( elem ) {
-			return !elem.firstChild;
-		},
+						parent[ expando ] = doneName;
+					}
 
-		has: function( elem, i, match ) {
-			return !!Sizzle( match[3], elem ).length;
-		},
+					diff = elem.sizset - last;
 
-		header: function( elem ) {
-			return (/h\d/i).test( elem.nodeName );
-		},
+					if ( first === 0 ) {
+						return diff === 0;
 
-		text: function( elem ) {
-			var attr = elem.getAttribute( "type" ), type = elem.type;
-			// IE6 and 7 will map elem.type to 'text' for new HTML5 types (search, etc)
-			// use getAttribute instead to test this case
-			return elem.nodeName.toLowerCase() === "input" && "text" === type && ( attr === type || attr === null );
-		},
+					} else {
+						return ( diff % first === 0 && diff / first >= 0 );
+					}
+				};
+			}
 
-		radio: function( elem ) {
-			return elem.nodeName.toLowerCase() === "input" && "radio" === elem.type;
-		},
+			return function( elem ) {
+				var node = elem;
 
-		checkbox: function( elem ) {
-			return elem.nodeName.toLowerCase() === "input" && "checkbox" === elem.type;
-		},
+				switch ( type ) {
+					case "only":
+					case "first":
+						while ( (node = node.previousSibling) ) {
+							if ( node.nodeType === 1 ) {
+								return false;
+							}
+						}
 
-		file: function( elem ) {
-			return elem.nodeName.toLowerCase() === "input" && "file" === elem.type;
-		},
+						if ( type === "first" ) {
+							return true;
+						}
 
-		password: function( elem ) {
-			return elem.nodeName.toLowerCase() === "input" && "password" === elem.type;
-		},
+						node = elem;
 
-		submit: function( elem ) {
-			var name = elem.nodeName.toLowerCase();
-			return (name === "input" || name === "button") && "submit" === elem.type;
-		},
+						/* falls through */
+					case "last":
+						while ( (node = node.nextSibling) ) {
+							if ( node.nodeType === 1 ) {
+								return false;
+							}
+						}
 
-		image: function( elem ) {
-			return elem.nodeName.toLowerCase() === "input" && "image" === elem.type;
+						return true;
+				}
+			};
 		},
 
-		reset: function( elem ) {
-			var name = elem.nodeName.toLowerCase();
-			return (name === "input" || name === "button") && "reset" === elem.type;
-		},
+		"PSEUDO": function( pseudo, argument, context, xml ) {
+			// pseudo-class names are case-insensitive
+			// http://www.w3.org/TR/selectors/#pseudo-classes
+			// Prioritize by case sensitivity in case custom pseudos are added with uppercase letters
+			var args,
+				fn = Expr.pseudos[ pseudo ] || Expr.pseudos[ pseudo.toLowerCase() ];
 
-		button: function( elem ) {
-			var name = elem.nodeName.toLowerCase();
-			return name === "input" && "button" === elem.type || name === "button";
-		},
+			if ( !fn ) {
+				Sizzle.error( "unsupported pseudo: " + pseudo );
+			}
 
-		input: function( elem ) {
-			return (/input|select|textarea|button/i).test( elem.nodeName );
-		},
+			// The user may use createPseudo to indicate that
+			// arguments are needed to create the filter function
+			// just as Sizzle does
+			if ( !fn[ expando ] ) {
+				if ( fn.length > 1 ) {
+					args = [ pseudo, pseudo, "", argument ];
+					return function( elem ) {
+						return fn( elem, 0, args );
+					};
+				}
+				return fn;
+			}
 
-		focus: function( elem ) {
-			return elem === elem.ownerDocument.activeElement;
+			return fn( argument, context, xml );
 		}
 	},
-	setFilters: {
-		first: function( elem, i ) {
-			return i === 0;
-		},
 
-		last: function( elem, i, match, array ) {
-			return i === array.length - 1;
+	pseudos: {
+		"not": markFunction(function( selector, context, xml ) {
+			// Trim the selector passed to compile
+			// to avoid treating leading and trailing
+			// spaces as combinators
+			var matcher = compile( selector.replace( rtrim, "$1" ), context, xml );
+			return function( elem ) {
+				return !matcher( elem );
+			};
+		}),
+
+		"enabled": function( elem ) {
+			return elem.disabled === false;
 		},
 
-		even: function( elem, i ) {
-			return i % 2 === 0;
+		"disabled": function( elem ) {
+			return elem.disabled === true;
 		},
 
-		odd: function( elem, i ) {
-			return i % 2 === 1;
+		"checked": function( elem ) {
+			// In CSS3, :checked should return both checked and selected elements
+			// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
+			var nodeName = elem.nodeName.toLowerCase();
+			return (nodeName === "input" && !!elem.checked) || (nodeName === "option" && !!elem.selected);
 		},
 
-		lt: function( elem, i, match ) {
-			return i < match[3] - 0;
-		},
+		"selected": function( elem ) {
+			// Accessing this property makes selected-by-default
+			// options in Safari work properly
+			if ( elem.parentNode ) {
+				elem.parentNode.selectedIndex;
+			}
 
-		gt: function( elem, i, match ) {
-			return i > match[3] - 0;
+			return elem.selected === true;
 		},
 
-		nth: function( elem, i, match ) {
-			return match[3] - 0 === i;
+		"parent": function( elem ) {
+			return !Expr.pseudos["empty"]( elem );
 		},
 
-		eq: function( elem, i, match ) {
-			return match[3] - 0 === i;
-		}
-	},
-	filter: {
-		PSEUDO: function( elem, match, i, array ) {
-			var name = match[1],
-				filter = Expr.filters[ name ];
-
-			if ( filter ) {
-				return filter( elem, i, match, array );
-
-			} else if ( name === "contains" ) {
-				return (elem.textContent || elem.innerText || getText([ elem ]) || "").indexOf(match[3]) >= 0;
-
-			} else if ( name === "not" ) {
-				var not = match[3];
-
-				for ( var j = 0, l = not.length; j < l; j++ ) {
-					if ( not[j] === elem ) {
-						return false;
-					}
+		"empty": function( elem ) {
+			// http://www.w3.org/TR/selectors/#empty-pseudo
+			// :empty is only affected by element nodes and content nodes(including text(3), cdata(4)),
+			//   not comment, processing instructions, or others
+			// Thanks to Diego Perini for the nodeName shortcut
+			//   Greater than "@" means alpha characters (specifically not starting with "#" or "?")
+			var nodeType;
+			elem = elem.firstChild;
+			while ( elem ) {
+				if ( elem.nodeName > "@" || (nodeType = elem.nodeType) === 3 || nodeType === 4 ) {
+					return false;
 				}
-
-				return true;
-
-			} else {
-				Sizzle.error( name );
+				elem = elem.nextSibling;
 			}
+			return true;
 		},
 
-		CHILD: function( elem, match ) {
-			var first, last,
-				doneName, parent, cache,
-				count, diff,
-				type = match[1],
-				node = elem;
-
-			switch ( type ) {
-				case "only":
-				case "first":
-					while ( (node = node.previousSibling) ) {
-						if ( node.nodeType === 1 ) {
-							return false;
-						}
-					}
-
-					if ( type === "first" ) {
-						return true;
-					}
-
-					node = elem;
-
-					/* falls through */
-				case "last":
-					while ( (node = node.nextSibling) ) {
-						if ( node.nodeType === 1 ) {
-							return false;
-						}
-					}
-
-					return true;
-
-				case "nth":
-					first = match[2];
-					last = match[3];
-
-					if ( first === 1 && last === 0 ) {
-						return true;
-					}
-
-					doneName = match[0];
-					parent = elem.parentNode;
-
-					if ( parent && (parent[ expando ] !== doneName || !elem.nodeIndex) ) {
-						count = 0;
-
-						for ( node = parent.firstChild; node; node = node.nextSibling ) {
-							if ( node.nodeType === 1 ) {
-								node.nodeIndex = ++count;
-							}
-						}
-
-						parent[ expando ] = doneName;
-					}
+		"contains": markFunction(function( text ) {
+			return function( elem ) {
+				return ( elem.textContent || elem.innerText || getText( elem ) ).indexOf( text ) > -1;
+			};
+		}),
 
-					diff = elem.nodeIndex - last;
+		"has": markFunction(function( selector ) {
+			return function( elem ) {
+				return Sizzle( selector, elem ).length > 0;
+			};
+		}),
 
-					if ( first === 0 ) {
-						return diff === 0;
+		"header": function( elem ) {
+			return rheader.test( elem.nodeName );
+		},
 
-					} else {
-						return ( diff % first === 0 && diff / first >= 0 );
-					}
-			}
+		"text": function( elem ) {
+			var type, attr;
+			// IE6 and 7 will map elem.type to 'text' for new HTML5 types (search, etc)
+			// use getAttribute instead to test this case
+			return elem.nodeName.toLowerCase() === "input" &&
+				(type = elem.type) === "text" &&
+				( (attr = elem.getAttribute("type")) == null || attr.toLowerCase() === type );
 		},
 
-		ID: function( elem, match ) {
-			return elem.nodeType === 1 && elem.getAttribute("id") === match;
+		// Input types
+		"radio": createInputPseudo("radio"),
+		"checkbox": createInputPseudo("checkbox"),
+		"file": createInputPseudo("file"),
+		"password": createInputPseudo("password"),
+		"image": createInputPseudo("image"),
+
+		"submit": createButtonPseudo("submit"),
+		"reset": createButtonPseudo("reset"),
+
+		"button": function( elem ) {
+			var name = elem.nodeName.toLowerCase();
+			return name === "input" && elem.type === "button" || name === "button";
 		},
 
-		TAG: function( elem, match ) {
-			return (match === "*" && elem.nodeType === 1) || !!elem.nodeName && elem.nodeName.toLowerCase() === match;
+		"input": function( elem ) {
+			return rinputs.test( elem.nodeName );
 		},
 
-		CLASS: function( elem, match ) {
-			return (" " + (elem.className || elem.getAttribute("class")) + " ")
-				.indexOf( match ) > -1;
+		"focus": function( elem ) {
+			var doc = elem.ownerDocument;
+			return elem === doc.activeElement && (!doc.hasFocus || doc.hasFocus()) && !!(elem.type || elem.href);
 		},
 
-		ATTR: function( elem, match ) {
-			var name = match[1],
-				result = Sizzle.attr ?
-					Sizzle.attr( elem, name ) :
-					Expr.attrHandle[ name ] ?
-					Expr.attrHandle[ name ]( elem ) :
-					elem[ name ] != null ?
-						elem[ name ] :
-						elem.getAttribute( name ),
-				value = result + "",
-				type = match[2],
-				check = match[4];
-
-			return result == null ?
-				type === "!=" :
-				!type && Sizzle.attr ?
-				result != null :
-				type === "=" ?
-				value === check :
-				type === "*=" ?
-				value.indexOf(check) >= 0 :
-				type === "~=" ?
-				(" " + value + " ").indexOf(check) >= 0 :
-				!check ?
-				value && result !== false :
-				type === "!=" ?
-				value !== check :
-				type === "^=" ?
-				value.indexOf(check) === 0 :
-				type === "$=" ?
-				value.substr(value.length - check.length) === check :
-				type === "|=" ?
-				value === check || value.substr(0, check.length + 1) === check + "-" :
-				false;
+		"active": function( elem ) {
+			return elem === elem.ownerDocument.activeElement;
+		}
+	},
+
+	setFilters: {
+		"first": function( elements, argument, not ) {
+			return not ? elements.slice( 1 ) : [ elements[0] ];
 		},
 
-		POS: function( elem, match, i, array ) {
-			var name = match[2],
-				filter = Expr.setFilters[ name ];
+		"last": function( elements, argument, not ) {
+			var elem = elements.pop();
+			return not ? elements : [ elem ];
+		},
 
-			if ( filter ) {
-				return filter( elem, i, match, array );
+		"even": function( elements, argument, not ) {
+			var results = [],
+				i = not ? 1 : 0,
+				len = elements.length;
+			for ( ; i < len; i = i + 2 ) {
+				results.push( elements[i] );
 			}
-		}
-	}
-};
+			return results;
+		},
 
-var origPOS = Expr.match.POS,
-	fescape = function(all, num){
-		return "\\" + (num - 0 + 1);
-	};
+		"odd": function( elements, argument, not ) {
+			var results = [],
+				i = not ? 0 : 1,
+				len = elements.length;
+			for ( ; i < len; i = i + 2 ) {
+				results.push( elements[i] );
+			}
+			return results;
+		},
 
-for ( var type in Expr.match ) {
-	Expr.match[ type ] = new RegExp( Expr.match[ type ].source + (/(?![^\[]*\])(?![^\(]*\))/.source) );
-	Expr.leftMatch[ type ] = new RegExp( /(^(?:.|\r|\n)*?)/.source + Expr.match[ type ].source.replace(/\\(\d+)/g, fescape) );
-}
-// Expose origPOS
-// "global" as in regardless of relation to brackets/parens
-Expr.match.globalPOS = origPOS;
+		"lt": function( elements, argument, not ) {
+			return not ? elements.slice( +argument ) : elements.slice( 0, +argument );
+		},
 
-var makeArray = function( array, results ) {
-	array = Array.prototype.slice.call( array, 0 );
+		"gt": function( elements, argument, not ) {
+			return not ? elements.slice( 0, +argument + 1 ) : elements.slice( +argument + 1 );
+		},
 
-	if ( results ) {
-		results.push.apply( results, array );
-		return results;
+		"eq": function( elements, argument, not ) {
+			var elem = elements.splice( +argument, 1 );
+			return not ? elements : elem;
+		}
 	}
-
-	return array;
 };
 
-// Perform a simple check to determine if the browser is capable of
-// converting a NodeList to an array using builtin methods.
-// Also verifies that the returned array holds DOM nodes
-// (which is not the case in the Blackberry browser)
-try {
-	Array.prototype.slice.call( document.documentElement.childNodes, 0 )[0].nodeType;
-
-// Provide a fallback method if it does not work
-} catch( e ) {
-	makeArray = function( array, results ) {
-		var i = 0,
-			ret = results || [];
-
-		if ( toString.call(array) === "[object Array]" ) {
-			Array.prototype.push.apply( ret, array );
+function siblingCheck( a, b, ret ) {
+	if ( a === b ) {
+		return ret;
+	}
 
-		} else {
-			if ( typeof array.length === "number" ) {
-				for ( var l = array.length; i < l; i++ ) {
-					ret.push( array[i] );
-				}
+	var cur = a.nextSibling;
 
-			} else {
-				for ( ; array[i]; i++ ) {
-					ret.push( array[i] );
-				}
-			}
+	while ( cur ) {
+		if ( cur === b ) {
+			return -1;
 		}
 
-		return ret;
-	};
-}
+		cur = cur.nextSibling;
+	}
 
-var sortOrder, siblingCheck;
+	return 1;
+}
 
-if ( document.documentElement.compareDocumentPosition ) {
-	sortOrder = function( a, b ) {
+sortOrder = docElem.compareDocumentPosition ?
+	function( a, b ) {
 		if ( a === b ) {
 			hasDuplicate = true;
 			return 0;
 		}
 
-		if ( !a.compareDocumentPosition || !b.compareDocumentPosition ) {
-			return a.compareDocumentPosition ? -1 : 1;
-		}
-
-		return a.compareDocumentPosition(b) & 4 ? -1 : 1;
-	};
-
-} else {
-	sortOrder = function( a, b ) {
+		return ( !a.compareDocumentPosition || !b.compareDocumentPosition ?
+			a.compareDocumentPosition :
+			a.compareDocumentPosition(b) & 4
+		) ? -1 : 1;
+	} :
+	function( a, b ) {
 		// The nodes are identical, we can exit early
 		if ( a === b ) {
 			hasDuplicate = true;
@@ -1036,414 +954,592 @@ if ( document.documentElement.compareDocumentPosition ) {
 			siblingCheck( ap[i], b, 1 );
 	};
 
-	siblingCheck = function( a, b, ret ) {
-		if ( a === b ) {
-			return ret;
-		}
+// Always assume the presence of duplicates if sort doesn't
+// pass them to our comparison function (as in Google Chrome).
+[0, 0].sort( sortOrder );
+baseHasDuplicate = !hasDuplicate;
 
-		var cur = a.nextSibling;
+// Document sorting and removing duplicates
+Sizzle.uniqueSort = function( results ) {
+	var elem,
+		i = 1;
 
-		while ( cur ) {
-			if ( cur === b ) {
-				return -1;
-			}
+	hasDuplicate = baseHasDuplicate;
+	results.sort( sortOrder );
 
-			cur = cur.nextSibling;
+	if ( hasDuplicate ) {
+		for ( ; (elem = results[i]); i++ ) {
+			if ( elem === results[ i - 1 ] ) {
+				results.splice( i--, 1 );
+			}
 		}
+	}
 
-		return 1;
-	};
-}
-
-// Check to see if the browser returns elements by name when
-// querying by getElementById (and provide a workaround)
-(function(){
-	// We're going to inject a fake input element with a specified name
-	var form = document.createElement("div"),
-		id = "script" + (new Date()).getTime(),
-		root = document.documentElement;
-
-	form.innerHTML = "<a name='" + id + "'/>";
-
-	// Inject it into the root element, check its status, and remove it quickly
-	root.insertBefore( form, root.firstChild );
-
-	// The workaround has to do additional checks after a getElementById
-	// Which slows things down for other browsers (hence the branching)
-	if ( document.getElementById( id ) ) {
-		Expr.find.ID = function( match, context, isXML ) {
-			if ( typeof context.getElementById !== "undefined" && !isXML ) {
-				var m = context.getElementById(match[1]);
-
-				return m ?
-					m.id === match[1] || typeof m.getAttributeNode !== "undefined" && m.getAttributeNode("id").nodeValue === match[1] ?
-						[m] :
-						undefined :
-					[];
-			}
-		};
+	return results;
+};
 
-		Expr.filter.ID = function( elem, match ) {
-			var node = typeof elem.getAttributeNode !== "undefined" && elem.getAttributeNode("id");
+Sizzle.error = function( msg ) {
+	throw new Error( "Syntax error, unrecognized expression: " + msg );
+};
 
-			return elem.nodeType === 1 && node && node.nodeValue === match;
-		};
+function tokenize( selector, context, xml, parseOnly ) {
+	var matched, match, tokens, type,
+		soFar, groups, group, i,
+		preFilters, filters,
+		checkContext = !xml && context !== document,
+		// Token cache should maintain spaces
+		key = ( checkContext ? "<s>" : "" ) + selector.replace( rtrim, "$1<s>" ),
+		cached = tokenCache[ expando ][ key ];
+
+	if ( cached ) {
+		return parseOnly ? 0 : slice.call( cached, 0 );
 	}
 
-	root.removeChild( form );
+	soFar = selector;
+	groups = [];
+	i = 0;
+	preFilters = Expr.preFilter;
+	filters = Expr.filter;
 
-	// release memory in IE
-	root = form = null;
-})();
+	while ( soFar ) {
 
-(function(){
-	// Check to see if the browser returns only elements
-	// when doing getElementsByTagName("*")
+		// Comma and first run
+		if ( !matched || (match = rcomma.exec( soFar )) ) {
+			if ( match ) {
+				soFar = soFar.slice( match[0].length );
+				tokens.selector = group;
+			}
+			groups.push( tokens = [] );
+			group = "";
 
-	// Create a fake element
-	var div = document.createElement("div");
-	div.appendChild( document.createComment("") );
+			// Need to make sure we're within a narrower context if necessary
+			// Adding a descendant combinator will generate what is needed
+			if ( checkContext ) {
+				soFar = " " + soFar;
+			}
+		}
 
-	// Make sure no comments are found
-	if ( div.getElementsByTagName("*").length > 0 ) {
-		Expr.find.TAG = function( match, context ) {
-			var results = context.getElementsByTagName( match[1] );
+		matched = false;
 
-			// Filter out possible comments
-			if ( match[1] === "*" ) {
-				var tmp = [];
+		// Combinators
+		if ( (match = rcombinators.exec( soFar )) ) {
+			group += match[0];
+			soFar = soFar.slice( match[0].length );
 
-				for ( var i = 0; results[i]; i++ ) {
-					if ( results[i].nodeType === 1 ) {
-						tmp.push( results[i] );
-					}
-				}
+			// Cast descendant combinators to space
+			matched = tokens.push({
+				part: match.pop().replace( rtrim, " " ),
+				string: match[0],
+				captures: match
+			});
+		}
 
-				results = tmp;
+		// Filters
+		for ( type in filters ) {
+			if ( (match = matchExpr[ type ].exec( soFar )) && (!preFilters[ type ] ||
+				( match = preFilters[ type ](match, context, xml) )) ) {
+
+				group += match[0];
+				soFar = soFar.slice( match[0].length );
+				matched = tokens.push({
+					part: type,
+					string: match.shift(),
+					captures: match
+				});
 			}
+		}
 
-			return results;
-		};
+		if ( !matched ) {
+			break;
+		}
 	}
 
-	// Check to see if an attribute returns normalized href attributes
-	div.innerHTML = "<a href='#'></a>";
-
-	if ( div.firstChild && typeof div.firstChild.getAttribute !== "undefined" &&
-			div.firstChild.getAttribute("href") !== "#" ) {
-
-		Expr.attrHandle.href = function( elem ) {
-			return elem.getAttribute( "href", 2 );
-		};
+	// Attach the full group as a selector
+	if ( group ) {
+		tokens.selector = group;
 	}
 
-	// release memory in IE
-	div = null;
-})();
-
-// Patch for jsdom
-if ( document.querySelectorAll && false ) {
-	(function(){
-		var oldSizzle = Sizzle,
-			div = document.createElement("div"),
-			id = "__sizzle__";
-
-		div.innerHTML = "<p class='TEST'></p>";
-
-		// Safari can't handle uppercase or unicode characters when
-		// in quirks mode.
-		if ( div.querySelectorAll && div.querySelectorAll(".TEST").length === 0 ) {
-			return;
-		}
-
-		Sizzle = function( query, context, extra, seed ) {
-			context = context || document;
-
-			// Only use querySelectorAll on non-XML documents
-			// (ID selectors don't work in non-HTML documents)
-			if ( !seed && !Sizzle.isXML(context) ) {
-				// See if we find a selector to speed up
-				var match = /^(\w+$)|^\.([\w\-]+$)|^#([\w\-]+$)/.exec( query );
+	// Return the length of the invalid excess
+	// if we're just parsing
+	// Otherwise, throw an error or return tokens
+	return parseOnly ?
+		soFar.length :
+		soFar ?
+			Sizzle.error( selector ) :
+			// Cache the tokens
+			slice.call( tokenCache(key, groups), 0 );
+}
 
-				if ( match && (context.nodeType === 1 || context.nodeType === 9) ) {
-					// Speed-up: Sizzle("TAG")
-					if ( match[1] ) {
-						return makeArray( context.getElementsByTagName( query ), extra );
+function addCombinator( matcher, combinator, context, xml ) {
+	var dir = combinator.dir,
+		doneName = done++;
 
-					// Speed-up: Sizzle(".CLASS")
-					} else if ( match[2] && Expr.find.CLASS && context.getElementsByClassName ) {
-						return makeArray( context.getElementsByClassName( match[2] ), extra );
+	if ( !matcher ) {
+		// If there is no matcher to check, check against the context
+		matcher = function( elem ) {
+			return elem === context;
+		};
+	}
+	return combinator.first ?
+		function( elem ) {
+			while ( (elem = elem[ dir ]) ) {
+				if ( elem.nodeType === 1 ) {
+					return matcher( elem ) && elem;
+				}
+			}
+		} :
+		xml ?
+			function( elem ) {
+				while ( (elem = elem[ dir ]) ) {
+					if ( elem.nodeType === 1 ) {
+						if ( matcher( elem ) ) {
+							return elem;
+						}
 					}
 				}
-
-				if ( context.nodeType === 9 ) {
-					// Speed-up: Sizzle("body")
-					// The body element only exists once, optimize finding it
-					if ( query === "body" && context.body ) {
-						return makeArray( [ context.body ], extra );
-
-					// Speed-up: Sizzle("#ID")
-					} else if ( match && match[3] ) {
-						var elem = context.getElementById( match[3] );
-
-						// Check parentNode to catch when Blackberry 4.6 returns
-						// nodes that are no longer in the document #6963
-						if ( elem && elem.parentNode ) {
-							// Handle the case where IE and Opera return items
-							// by name instead of ID
-							if ( elem.id === match[3] ) {
-								return makeArray( [ elem ], extra );
+			} :
+			function( elem ) {
+				var cache,
+					dirkey = doneName + "." + dirruns,
+					cachedkey = dirkey + "." + cachedruns;
+				while ( (elem = elem[ dir ]) ) {
+					if ( elem.nodeType === 1 ) {
+						if ( (cache = elem[ expando ]) === cachedkey ) {
+							return elem.sizset;
+						} else if ( typeof cache === "string" && cache.indexOf(dirkey) === 0 ) {
+							if ( elem.sizset ) {
+								return elem;
 							}
-
 						} else {
-							return makeArray( [], extra );
+							elem[ expando ] = cachedkey;
+							if ( matcher( elem ) ) {
+								elem.sizset = true;
+								return elem;
+							}
+							elem.sizset = false;
 						}
 					}
+				}
+			};
+}
 
-					try {
-						return makeArray( context.querySelectorAll(query), extra );
-					} catch(qsaError) {}
+function addMatcher( higher, deeper ) {
+	return higher ?
+		function( elem ) {
+			var result = deeper( elem );
+			return result && higher( result === true ? elem : result );
+		} :
+		deeper;
+}
 
-				// qSA works strangely on Element-rooted queries
-				// We can work around this by specifying an extra ID on the root
-				// and working up from there (Thanks to Andrew Dupont for the technique)
-				// IE 8 doesn't work on object elements
-				} else if ( context.nodeType === 1 && context.nodeName.toLowerCase() !== "object" ) {
-					var oldContext = context,
-						old = context.getAttribute( "id" ),
-						nid = old || id,
-						hasParent = context.parentNode,
-						relativeHierarchySelector = /^\s*[+~]/.test( query );
+// ["TAG", ">", "ID", " ", "CLASS"]
+function matcherFromTokens( tokens, context, xml ) {
+	var token, matcher,
+		i = 0;
 
-					if ( !old ) {
-						context.setAttribute( "id", nid );
-					} else {
-						nid = nid.replace( /'/g, "\\$&" );
-					}
-					if ( relativeHierarchySelector && hasParent ) {
-						context = context.parentNode;
-					}
+	for ( ; (token = tokens[i]); i++ ) {
+		if ( Expr.relative[ token.part ] ) {
+			matcher = addCombinator( matcher, Expr.relative[ token.part ], context, xml );
+		} else {
+			matcher = addMatcher( matcher, Expr.filter[ token.part ].apply(null, token.captures.concat( context, xml )) );
+		}
+	}
 
-					try {
-						if ( !relativeHierarchySelector || hasParent ) {
-							return makeArray( context.querySelectorAll( "[id='" + nid + "'] " + query ), extra );
-						}
+	return matcher;
+}
 
-					} catch(pseudoError) {
-					} finally {
-						if ( !old ) {
-							oldContext.removeAttribute( "id" );
-						}
-					}
-				}
+function matcherFromGroupMatchers( matchers ) {
+	return function( elem ) {
+		var matcher,
+			j = 0;
+		for ( ; (matcher = matchers[j]); j++ ) {
+			if ( matcher(elem) ) {
+				return true;
 			}
+		}
+		return false;
+	};
+}
 
-			return oldSizzle(query, context, extra, seed);
-		};
+compile = Sizzle.compile = function( selector, context, xml ) {
+	var group, i, len,
+		cached = compilerCache[ expando ][ selector ];
 
-		for ( var prop in oldSizzle ) {
-			Sizzle[ prop ] = oldSizzle[ prop ];
-		}
+	// Return a cached group function if already generated (context dependent)
+	if ( cached && cached.context === context ) {
+		return cached;
+	}
 
-		// release memory in IE
-		div = null;
-	})();
+	// Generate a function of recursive functions that can be used to check each element
+	group = tokenize( selector, context, xml );
+	for ( i = 0, len = group.length; i < len; i++ ) {
+		group[i] = matcherFromTokens(group[i], context, xml);
+	}
+
+	// Cache the compiled function
+	cached = compilerCache( selector, matcherFromGroupMatchers(group) );
+	cached.context = context;
+	cached.runs = cached.dirruns = 0;
+	return cached;
+};
+
+function multipleContexts( selector, contexts, results, seed ) {
+	var i = 0,
+		len = contexts.length;
+	for ( ; i < len; i++ ) {
+		Sizzle( selector, contexts[i], results, seed );
+	}
 }
 
-(function(){
-	var html = document.documentElement,
-		matches = html.matchesSelector || html.mozMatchesSelector || html.webkitMatchesSelector || html.msMatchesSelector;
+function handlePOSGroup( selector, posfilter, argument, contexts, seed, not ) {
+	var results,
+		fn = Expr.setFilters[ posfilter.toLowerCase() ];
 
-	if ( matches ) {
-		// Check to see if it's possible to do matchesSelector
-		// on a disconnected node (IE 9 fails this)
-		var disconnectedMatch = !matches.call( document.createElement( "div" ), "div" ),
-			pseudoWorks = false;
+	if ( !fn ) {
+		Sizzle.error( posfilter );
+	}
 
-		try {
-			// This should fail with an exception
-			// Gecko does not error, returns false instead
-			matches.call( document.documentElement, "[test!='']:sizzle" );
+	if ( selector || !(results = seed) ) {
+		multipleContexts( selector || "*", contexts, (results = []), seed );
+	}
 
-		} catch( pseudoError ) {
-			pseudoWorks = true;
-		}
+	return results.length > 0 ? fn( results, argument, not ) : [];
+}
 
-		Sizzle.matchesSelector = function( node, expr ) {
-			// Make sure that attribute selectors are quoted
-			expr = expr.replace(/\=\s*([^'"\]]*)\s*\]/g, "='$1']");
+function handlePOS( groups, context, results, seed ) {
+	var group, part, j, groupLen, token, selector,
+		anchor, elements, match, matched,
+		lastIndex, currentContexts, not,
+		i = 0,
+		len = groups.length,
+		rpos = matchExpr["POS"],
+		// This is generated here in case matchExpr["POS"] is extended
+		rposgroups = new RegExp( "^" + rpos.source + "(?!" + whitespace + ")", "i" ),
+		// This is for making sure non-participating
+		// matching groups are represented cross-browser (IE6-8)
+		setUndefined = function() {
+			var i = 1,
+				len = arguments.length - 2;
+			for ( ; i < len; i++ ) {
+				if ( arguments[i] === undefined ) {
+					match[i] = undefined;
+				}
+			}
+		};
 
-			if ( !Sizzle.isXML( node ) ) {
-				try {
-					if ( pseudoWorks || !Expr.match.PSEUDO.test( expr ) && !/!=/.test( expr ) ) {
-						var ret = matches.call( node, expr );
+	for ( ; i < len; i++ ) {
+		group = groups[i];
+		part = "";
+		elements = seed;
+		for ( j = 0, groupLen = group.length; j < groupLen; j++ ) {
+			token = group[j];
+			selector = token.string;
+			if ( token.part === "PSEUDO" ) {
+				// Reset regex index to 0
+				rpos.exec("");
+				anchor = 0;
+				while ( (match = rpos.exec( selector )) ) {
+					matched = true;
+					lastIndex = rpos.lastIndex = match.index + match[0].length;
+					if ( lastIndex > anchor ) {
+						part += selector.slice( anchor, match.index );
+						anchor = lastIndex;
+						currentContexts = [ context ];
+
+						if ( rcombinators.test(part) ) {
+							if ( elements ) {
+								currentContexts = elements;
+							}
+							elements = seed;
+						}
 
-						// IE 9's matchesSelector returns false on disconnected nodes
-						if ( ret || !disconnectedMatch ||
-								// As well, disconnected nodes are said to be in a document
-								// fragment in IE 9, so check for that
-								node.document && node.document.nodeType !== 11 ) {
-							return ret;
+						if ( (not = rendsWithNot.test( part )) ) {
+							part = part.slice( 0, -5 ).replace( rcombinators, "$&*" );
+							anchor++;
 						}
-					}
-				} catch(e) {}
-			}
 
-			return Sizzle(expr, null, null, [node]).length > 0;
-		};
-	}
-})();
+						if ( match.length > 1 ) {
+							match[0].replace( rposgroups, setUndefined );
+						}
+						elements = handlePOSGroup( part, match[1], match[2], currentContexts, elements, not );
+					}
+					part = "";
+				}
 
-(function(){
-	var div = document.createElement("div");
+			}
 
-	div.innerHTML = "<div class='test e'></div><div class='test'></div>";
+			if ( !matched ) {
+				part += selector;
+			}
+			matched = false;
+		}
 
-	// Opera can't find a second classname (in 9.6)
-	// Also, make sure that getElementsByClassName actually exists
-	if ( !div.getElementsByClassName || div.getElementsByClassName("e").length === 0 ) {
-		return;
+		if ( part ) {
+			if ( rcombinators.test(part) ) {
+				multipleContexts( part, elements || [ context ], results, seed );
+			} else {
+				Sizzle( part, context, results, seed ? seed.concat(elements) : elements );
+			}
+		} else {
+			push.apply( results, elements );
+		}
 	}
 
-	// Safari caches class attributes, doesn't catch changes (in 3.2)
-	div.lastChild.className = "e";
+	// Do not sort if this is a single filter
+	return len === 1 ? results : Sizzle.uniqueSort( results );
+}
 
-	if ( div.getElementsByClassName("e").length === 1 ) {
-		return;
+function select( selector, context, results, seed, xml ) {
+	// Remove excessive whitespace
+	selector = selector.replace( rtrim, "$1" );
+	var elements, matcher, cached, elem,
+		i, tokens, token, lastToken, findContext, type,
+		match = tokenize( selector, context, xml ),
+		contextNodeType = context.nodeType;
+
+	// POS handling
+	if ( matchExpr["POS"].test(selector) ) {
+		return handlePOS( match, context, results, seed );
 	}
 
-	Expr.order.splice(1, 0, "CLASS");
-	Expr.find.CLASS = function( match, context, isXML ) {
-		if ( typeof context.getElementsByClassName !== "undefined" && !isXML ) {
-			return context.getElementsByClassName(match[1]);
-		}
-	};
+	if ( seed ) {
+		elements = slice.call( seed, 0 );
 
-	// release memory in IE
-	div = null;
-})();
+	// To maintain document order, only narrow the
+	// set if there is one group
+	} else if ( match.length === 1 ) {
 
-function dirNodeCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
-	for ( var i = 0, l = checkSet.length; i < l; i++ ) {
-		var elem = checkSet[i];
+		// Take a shortcut and set the context if the root selector is an ID
+		if ( (tokens = slice.call( match[0], 0 )).length > 2 &&
+				(token = tokens[0]).part === "ID" &&
+				contextNodeType === 9 && !xml &&
+				Expr.relative[ tokens[1].part ] ) {
+
+			context = Expr.find["ID"]( token.captures[0].replace( rbackslash, "" ), context, xml )[0];
+			if ( !context ) {
+				return results;
+			}
 
-		if ( elem ) {
-			var match = false;
+			selector = selector.slice( tokens.shift().string.length );
+		}
 
-			elem = elem[dir];
+		findContext = ( (match = rsibling.exec( tokens[0].string )) && !match.index && context.parentNode ) || context;
 
-			while ( elem ) {
-				if ( elem[ expando ] === doneName ) {
-					match = checkSet[elem.sizset];
-					break;
-				}
+		// Reduce the set if possible
+		lastToken = "";
+		for ( i = tokens.length - 1; i >= 0; i-- ) {
+			token = tokens[i];
+			type = token.part;
+			lastToken = token.string + lastToken;
+			if ( Expr.relative[ type ] ) {
+				break;
+			}
+			if ( Expr.order.test(type) ) {
+				elements = Expr.find[ type ]( token.captures[0].replace( rbackslash, "" ), findContext, xml );
+				if ( elements == null ) {
+					continue;
+				} else {
+					selector = selector.slice( 0, selector.length - lastToken.length ) +
+						lastToken.replace( matchExpr[ type ], "" );
 
-				if ( elem.nodeType === 1 && !isXML ){
-					elem[ expando ] = doneName;
-					elem.sizset = i;
-				}
+					if ( !selector ) {
+						push.apply( results, slice.call(elements, 0) );
+					}
 
-				if ( elem.nodeName.toLowerCase() === cur ) {
-					match = elem;
 					break;
 				}
-
-				elem = elem[dir];
 			}
+		}
+	}
+
+	// Only loop over the given elements once
+	if ( selector ) {
+		matcher = compile( selector, context, xml );
+		dirruns = matcher.dirruns++;
+		if ( elements == null ) {
+			elements = Expr.find["TAG"]( "*", (rsibling.test( selector ) && context.parentNode) || context );
+		}
 
-			checkSet[i] = match;
+		for ( i = 0; (elem = elements[i]); i++ ) {
+			cachedruns = matcher.runs++;
+			if ( matcher(elem) ) {
+				results.push( elem );
+			}
 		}
 	}
+
+	return results;
 }
 
-function dirCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
-	for ( var i = 0, l = checkSet.length; i < l; i++ ) {
-		var elem = checkSet[i];
+// Patch for jsdom
+// we use sizzle to implement querySelectorAll, so sizzle cannot use it 
+if ( document.querySelectorAll && false ) {
+	(function() {
+		var disconnectedMatch,
+			oldSelect = select,
+			rescape = /'|\\/g,
+			rattributeQuotes = /\=[\x20\t\r\n\f]*([^'"\]]*)[\x20\t\r\n\f]*\]/g,
+			rbuggyQSA = [],
+			// matchesSelector(:active) reports false when true (IE9/Opera 11.5)
+			// A support test would require too much code (would include document ready)
+			// just skip matchesSelector for :active
+			rbuggyMatches = [":active"],
+			matches = docElem.matchesSelector ||
+				docElem.mozMatchesSelector ||
+				docElem.webkitMatchesSelector ||
+				docElem.oMatchesSelector ||
+				docElem.msMatchesSelector;
+
+		// Build QSA regex
+		// Regex strategy adopted from Diego Perini
+		assert(function( div ) {
+			// Select is set to empty string on purpose
+			// This is to test IE's treatment of not explictly
+			// setting a boolean content attribute,
+			// since its presence should be enough
+			// http://bugs.jquery.com/ticket/12359
+			div.innerHTML = "<select><option selected=''></option></select>";
+
+			// IE8 - Some boolean attributes are not treated correctly
+			if ( !div.querySelectorAll("[selected]").length ) {
+				rbuggyQSA.push( "\\[" + whitespace + "*(?:checked|disabled|ismap|multiple|readonly|selected|value)" );
+			}
+
+			// Webkit/Opera - :checked should return selected option elements
+			// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
+			// IE8 throws error here (do not put tests after this one)
+			if ( !div.querySelectorAll(":checked").length ) {
+				rbuggyQSA.push(":checked");
+			}
+		});
 
-		if ( elem ) {
-			var match = false;
+		assert(function( div ) {
 
-			elem = elem[dir];
+			// Opera 10-12/IE9 - ^= $= *= and empty values
+			// Should not select anything
+			div.innerHTML = "<p test=''></p>";
+			if ( div.querySelectorAll("[test^='']").length ) {
+				rbuggyQSA.push( "[*^$]=" + whitespace + "*(?:\"\"|'')" );
+			}
 
-			while ( elem ) {
-				if ( elem[ expando ] === doneName ) {
-					match = checkSet[elem.sizset];
-					break;
-				}
+			// FF 3.5 - :enabled/:disabled and hidden elements (hidden elements are still enabled)
+			// IE8 throws error here (do not put tests after this one)
+			div.innerHTML = "<input type='hidden'/>";
+			if ( !div.querySelectorAll(":enabled").length ) {
+				rbuggyQSA.push(":enabled", ":disabled");
+			}
+		});
 
-				if ( elem.nodeType === 1 ) {
-					if ( !isXML ) {
-						elem[ expando ] = doneName;
-						elem.sizset = i;
+		rbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join("|") );
+
+		select = function( selector, context, results, seed, xml ) {
+			// Only use querySelectorAll when not filtering,
+			// when this is not xml,
+			// and when no QSA bugs apply
+			if ( !seed && !xml && (!rbuggyQSA || !rbuggyQSA.test( selector )) ) {
+				if ( context.nodeType === 9 ) {
+					try {
+						push.apply( results, slice.call(context.querySelectorAll( selector ), 0) );
+						return results;
+					} catch(qsaError) {}
+				// qSA works strangely on Element-rooted queries
+				// We can work around this by specifying an extra ID on the root
+				// and working up from there (Thanks to Andrew Dupont for the technique)
+				// IE 8 doesn't work on object elements
+				} else if ( context.nodeType === 1 && context.nodeName.toLowerCase() !== "object" ) {
+					var groups, i, len,
+						old = context.getAttribute("id"),
+						nid = old || expando,
+						newContext = rsibling.test( selector ) && context.parentNode || context;
+
+					if ( old ) {
+						nid = nid.replace( rescape, "\\$&" );
+					} else {
+						context.setAttribute( "id", nid );
 					}
 
-					if ( typeof cur !== "string" ) {
-						if ( elem === cur ) {
-							match = true;
-							break;
+					groups = tokenize(selector, context, xml);
+					// Trailing space is unnecessary
+					// There is always a context check
+					nid = "[id='" + nid + "']";
+					for ( i = 0, len = groups.length; i < len; i++ ) {
+						groups[i] = nid + groups[i].selector;
+					}
+					try {
+						push.apply( results, slice.call( newContext.querySelectorAll(
+							groups.join(",")
+						), 0 ) );
+						return results;
+					} catch(qsaError) {
+					} finally {
+						if ( !old ) {
+							context.removeAttribute("id");
 						}
-
-					} else if ( Sizzle.filter( cur, [elem] ).length > 0 ) {
-						match = elem;
-						break;
 					}
 				}
-
-				elem = elem[dir];
 			}
 
-			checkSet[i] = match;
-		}
-	}
-}
+			return oldSelect( selector, context, results, seed, xml );
+		};
 
-if ( document.documentElement.contains ) {
-	Sizzle.contains = function( a, b ) {
-		return a !== b && (a.contains ? a.contains(b) : true);
-	};
+		if ( matches ) {
+			assert(function( div ) {
+				// Check to see if it's possible to do matchesSelector
+				// on a disconnected node (IE 9)
+				disconnectedMatch = matches.call( div, "div" );
 
-} else if ( document.documentElement.compareDocumentPosition ) {
-	Sizzle.contains = function( a, b ) {
-		return !!(a.compareDocumentPosition(b) & 16);
-	};
+				// This should fail with an exception
+				// Gecko does not error, returns false instead
+				try {
+					matches.call( div, "[test!='']:sizzle" );
+					rbuggyMatches.push( matchExpr["PSEUDO"].source, matchExpr["POS"].source, "!=" );
+				} catch ( e ) {}
+			});
 
-} else {
-	Sizzle.contains = function() {
-		return false;
-	};
-}
+			// rbuggyMatches always contains :active, so no need for a length check
+			rbuggyMatches = /* rbuggyMatches.length && */ new RegExp( rbuggyMatches.join("|") );
 
-Sizzle.isXML = function( elem ) {
-	// documentElement is verified for cases where it doesn't yet exist
-	// (such as loading iframes in IE - #4833)
-	var documentElement = (elem ? elem.ownerDocument || elem : 0).documentElement;
+			Sizzle.matchesSelector = function( elem, expr ) {
+				// Make sure that attribute selectors are quoted
+				expr = expr.replace( rattributeQuotes, "='$1']" );
 
-	return documentElement ? documentElement.nodeName !== "HTML" : false;
-};
+				// rbuggyMatches always contains :active, so no need for an existence check
+				if ( !isXML( elem ) && !rbuggyMatches.test( expr ) && (!rbuggyQSA || !rbuggyQSA.test( expr )) ) {
+					try {
+						var ret = matches.call( elem, expr );
 
-var posProcess = function( selector, context, seed ) {
-	var match,
-		tmpSet = [],
-		later = "",
-		root = context.nodeType ? [context] : context;
-
-	// Position selectors must be done after the filter
-	// And so must :not(positional) so we move all PSEUDOs to the end
-	while ( (match = Expr.match.PSEUDO.exec( selector )) ) {
-		later += match[0];
-		selector = selector.replace( Expr.match.PSEUDO, "" );
-	}
+						// IE 9's matchesSelector returns false on disconnected nodes
+						if ( ret || disconnectedMatch ||
+								// As well, disconnected nodes are said to be in a document
+								// fragment in IE 9
+								elem.document && elem.document.nodeType !== 11 ) {
+							return ret;
+						}
+					} catch(e) {}
+				}
 
-	selector = Expr.relative[selector] ? selector + "*" : selector;
+				return Sizzle( expr, null, null, [ elem ] ).length > 0;
+			};
+		}
+	})();
+}
 
-	for ( var i = 0, l = root.length; i < l; i++ ) {
-		Sizzle( selector, root[i], tmpSet, seed );
-	}
+// Deprecated
+Expr.setFilters["nth"] = Expr.setFilters["eq"];
 
-	return Sizzle.filter( later, tmpSet );
-};
+// Back-compat
+Expr.filters = Expr.pseudos;
 
 // EXPOSE
+/* patch for jsdom */
 return Sizzle;
+/*
+if ( typeof define === "function" && define.amd ) {
+	define(function() { return Sizzle; });
+} else {
+	window.Sizzle = Sizzle;
+}
+*/
+// EXPOSE
 
-};
\ No newline at end of file
+};

sizzle-mods.patch

--- sizzle.js.github-20120907	2012-09-07 11:19:33.655864433 -0400
+++ ./sizzle.js	2012-09-07 11:28:10.044305054 -0400
@@ -4,7 +4,8 @@
  *  Released under the MIT license
  *  http://sizzlejs.com/
  */
-(function( window, undefined ) {
+// Patch for jsdom
+module.exports = function( document ) {
 
 var dirruns,
 	cachedruns,
@@ -22,7 +23,7 @@
 
 	expando = ( "sizcache" + Math.random() ).replace( ".", "" ),
 
-	document = window.document,
+	// jsdom document = window.document,
 	docElem = document.documentElement,
 	done = 0,
 	slice = [].slice,
@@ -200,7 +201,10 @@
 
 function Sizzle( selector, context, results, seed ) {
 	results = results || [];
-	context = context || document;
+	// PATCH for jsdom
+	// context = context || document;
+	// See: https://github.com/tmpvar/jsdom/issues/375
+	context = context || seed[0].ownerDocument;
 	var match, elem, xml, m,
 		nodeType = context.nodeType;
 
@@ -1367,7 +1371,9 @@
 	return results;
 }
 
-if ( document.querySelectorAll ) {
+// Patch for jsdom
+// we use sizzle to implement querySelectorAll, so sizzle cannot use it 
+if ( document.querySelectorAll && false ) {
 	(function() {
 		var disconnectedMatch,
 			oldSelect = select,
@@ -1525,11 +1531,15 @@
 Expr.filters = Expr.pseudos;
 
 // EXPOSE
+/* patch for jsdom */
+return Sizzle;
+/*
 if ( typeof define === "function" && define.amd ) {
 	define(function() { return Sizzle; });
 } else {
 	window.Sizzle = Sizzle;
 }
+*/
 // EXPOSE
 
-})( window );
+};