MDL-53454 libraries: upgrade jquery to 1.12.1 version
[moodle.git] / lib / jquery / jquery-1.12.1.js
1 /*!
2  * jQuery JavaScript Library v1.12.1
3  * http://jquery.com/
4  *
5  * Includes Sizzle.js
6  * http://sizzlejs.com/
7  *
8  * Copyright jQuery Foundation and other contributors
9  * Released under the MIT license
10  * http://jquery.org/license
11  *
12  * Date: 2016-02-22T19:07Z
13  */
15 (function( global, factory ) {
17         if ( typeof module === "object" && typeof module.exports === "object" ) {
18                 // For CommonJS and CommonJS-like environments where a proper `window`
19                 // is present, execute the factory and get jQuery.
20                 // For environments that do not have a `window` with a `document`
21                 // (such as Node.js), expose a factory as module.exports.
22                 // This accentuates the need for the creation of a real `window`.
23                 // e.g. var jQuery = require("jquery")(window);
24                 // See ticket #14549 for more info.
25                 module.exports = global.document ?
26                         factory( global, true ) :
27                         function( w ) {
28                                 if ( !w.document ) {
29                                         throw new Error( "jQuery requires a window with a document" );
30                                 }
31                                 return factory( w );
32                         };
33         } else {
34                 factory( global );
35         }
37 // Pass this if window is not defined yet
38 }(typeof window !== "undefined" ? window : this, function( window, noGlobal ) {
40 // Support: Firefox 18+
41 // Can't be in strict mode, several libs including ASP.NET trace
42 // the stack via arguments.caller.callee and Firefox dies if
43 // you try to trace through "use strict" call chains. (#13335)
44 //"use strict";
45 var deletedIds = [];
47 var document = window.document;
49 var slice = deletedIds.slice;
51 var concat = deletedIds.concat;
53 var push = deletedIds.push;
55 var indexOf = deletedIds.indexOf;
57 var class2type = {};
59 var toString = class2type.toString;
61 var hasOwn = class2type.hasOwnProperty;
63 var support = {};
67 var
68         version = "1.12.1",
70         // Define a local copy of jQuery
71         jQuery = function( selector, context ) {
73                 // The jQuery object is actually just the init constructor 'enhanced'
74                 // Need init if jQuery is called (just allow error to be thrown if not included)
75                 return new jQuery.fn.init( selector, context );
76         },
78         // Support: Android<4.1, IE<9
79         // Make sure we trim BOM and NBSP
80         rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g,
82         // Matches dashed string for camelizing
83         rmsPrefix = /^-ms-/,
84         rdashAlpha = /-([\da-z])/gi,
86         // Used by jQuery.camelCase as callback to replace()
87         fcamelCase = function( all, letter ) {
88                 return letter.toUpperCase();
89         };
91 jQuery.fn = jQuery.prototype = {
93         // The current version of jQuery being used
94         jquery: version,
96         constructor: jQuery,
98         // Start with an empty selector
99         selector: "",
101         // The default length of a jQuery object is 0
102         length: 0,
104         toArray: function() {
105                 return slice.call( this );
106         },
108         // Get the Nth element in the matched element set OR
109         // Get the whole matched element set as a clean array
110         get: function( num ) {
111                 return num != null ?
113                         // Return just the one element from the set
114                         ( num < 0 ? this[ num + this.length ] : this[ num ] ) :
116                         // Return all the elements in a clean array
117                         slice.call( this );
118         },
120         // Take an array of elements and push it onto the stack
121         // (returning the new matched element set)
122         pushStack: function( elems ) {
124                 // Build a new jQuery matched element set
125                 var ret = jQuery.merge( this.constructor(), elems );
127                 // Add the old object onto the stack (as a reference)
128                 ret.prevObject = this;
129                 ret.context = this.context;
131                 // Return the newly-formed element set
132                 return ret;
133         },
135         // Execute a callback for every element in the matched set.
136         each: function( callback ) {
137                 return jQuery.each( this, callback );
138         },
140         map: function( callback ) {
141                 return this.pushStack( jQuery.map( this, function( elem, i ) {
142                         return callback.call( elem, i, elem );
143                 } ) );
144         },
146         slice: function() {
147                 return this.pushStack( slice.apply( this, arguments ) );
148         },
150         first: function() {
151                 return this.eq( 0 );
152         },
154         last: function() {
155                 return this.eq( -1 );
156         },
158         eq: function( i ) {
159                 var len = this.length,
160                         j = +i + ( i < 0 ? len : 0 );
161                 return this.pushStack( j >= 0 && j < len ? [ this[ j ] ] : [] );
162         },
164         end: function() {
165                 return this.prevObject || this.constructor();
166         },
168         // For internal use only.
169         // Behaves like an Array's method, not like a jQuery method.
170         push: push,
171         sort: deletedIds.sort,
172         splice: deletedIds.splice
173 };
175 jQuery.extend = jQuery.fn.extend = function() {
176         var src, copyIsArray, copy, name, options, clone,
177                 target = arguments[ 0 ] || {},
178                 i = 1,
179                 length = arguments.length,
180                 deep = false;
182         // Handle a deep copy situation
183         if ( typeof target === "boolean" ) {
184                 deep = target;
186                 // skip the boolean and the target
187                 target = arguments[ i ] || {};
188                 i++;
189         }
191         // Handle case when target is a string or something (possible in deep copy)
192         if ( typeof target !== "object" && !jQuery.isFunction( target ) ) {
193                 target = {};
194         }
196         // extend jQuery itself if only one argument is passed
197         if ( i === length ) {
198                 target = this;
199                 i--;
200         }
202         for ( ; i < length; i++ ) {
204                 // Only deal with non-null/undefined values
205                 if ( ( options = arguments[ i ] ) != null ) {
207                         // Extend the base object
208                         for ( name in options ) {
209                                 src = target[ name ];
210                                 copy = options[ name ];
212                                 // Prevent never-ending loop
213                                 if ( target === copy ) {
214                                         continue;
215                                 }
217                                 // Recurse if we're merging plain objects or arrays
218                                 if ( deep && copy && ( jQuery.isPlainObject( copy ) ||
219                                         ( copyIsArray = jQuery.isArray( copy ) ) ) ) {
221                                         if ( copyIsArray ) {
222                                                 copyIsArray = false;
223                                                 clone = src && jQuery.isArray( src ) ? src : [];
225                                         } else {
226                                                 clone = src && jQuery.isPlainObject( src ) ? src : {};
227                                         }
229                                         // Never move original objects, clone them
230                                         target[ name ] = jQuery.extend( deep, clone, copy );
232                                 // Don't bring in undefined values
233                                 } else if ( copy !== undefined ) {
234                                         target[ name ] = copy;
235                                 }
236                         }
237                 }
238         }
240         // Return the modified object
241         return target;
242 };
244 jQuery.extend( {
246         // Unique for each copy of jQuery on the page
247         expando: "jQuery" + ( version + Math.random() ).replace( /\D/g, "" ),
249         // Assume jQuery is ready without the ready module
250         isReady: true,
252         error: function( msg ) {
253                 throw new Error( msg );
254         },
256         noop: function() {},
258         // See test/unit/core.js for details concerning isFunction.
259         // Since version 1.3, DOM methods and functions like alert
260         // aren't supported. They return false on IE (#2968).
261         isFunction: function( obj ) {
262                 return jQuery.type( obj ) === "function";
263         },
265         isArray: Array.isArray || function( obj ) {
266                 return jQuery.type( obj ) === "array";
267         },
269         isWindow: function( obj ) {
270                 /* jshint eqeqeq: false */
271                 return obj != null && obj == obj.window;
272         },
274         isNumeric: function( obj ) {
276                 // parseFloat NaNs numeric-cast false positives (null|true|false|"")
277                 // ...but misinterprets leading-number strings, particularly hex literals ("0x...")
278                 // subtraction forces infinities to NaN
279                 // adding 1 corrects loss of precision from parseFloat (#15100)
280                 var realStringObj = obj && obj.toString();
281                 return !jQuery.isArray( obj ) && ( realStringObj - parseFloat( realStringObj ) + 1 ) >= 0;
282         },
284         isEmptyObject: function( obj ) {
285                 var name;
286                 for ( name in obj ) {
287                         return false;
288                 }
289                 return true;
290         },
292         isPlainObject: function( obj ) {
293                 var key;
295                 // Must be an Object.
296                 // Because of IE, we also have to check the presence of the constructor property.
297                 // Make sure that DOM nodes and window objects don't pass through, as well
298                 if ( !obj || jQuery.type( obj ) !== "object" || obj.nodeType || jQuery.isWindow( obj ) ) {
299                         return false;
300                 }
302                 try {
304                         // Not own constructor property must be Object
305                         if ( obj.constructor &&
306                                 !hasOwn.call( obj, "constructor" ) &&
307                                 !hasOwn.call( obj.constructor.prototype, "isPrototypeOf" ) ) {
308                                 return false;
309                         }
310                 } catch ( e ) {
312                         // IE8,9 Will throw exceptions on certain host objects #9897
313                         return false;
314                 }
316                 // Support: IE<9
317                 // Handle iteration over inherited properties before own properties.
318                 if ( !support.ownFirst ) {
319                         for ( key in obj ) {
320                                 return hasOwn.call( obj, key );
321                         }
322                 }
324                 // Own properties are enumerated firstly, so to speed up,
325                 // if last one is own, then all properties are own.
326                 for ( key in obj ) {}
328                 return key === undefined || hasOwn.call( obj, key );
329         },
331         type: function( obj ) {
332                 if ( obj == null ) {
333                         return obj + "";
334                 }
335                 return typeof obj === "object" || typeof obj === "function" ?
336                         class2type[ toString.call( obj ) ] || "object" :
337                         typeof obj;
338         },
340         // Workarounds based on findings by Jim Driscoll
341         // http://weblogs.java.net/blog/driscoll/archive/2009/09/08/eval-javascript-global-context
342         globalEval: function( data ) {
343                 if ( data && jQuery.trim( data ) ) {
345                         // We use execScript on Internet Explorer
346                         // We use an anonymous function so that context is window
347                         // rather than jQuery in Firefox
348                         ( window.execScript || function( data ) {
349                                 window[ "eval" ].call( window, data ); // jscs:ignore requireDotNotation
350                         } )( data );
351                 }
352         },
354         // Convert dashed to camelCase; used by the css and data modules
355         // Microsoft forgot to hump their vendor prefix (#9572)
356         camelCase: function( string ) {
357                 return string.replace( rmsPrefix, "ms-" ).replace( rdashAlpha, fcamelCase );
358         },
360         nodeName: function( elem, name ) {
361                 return elem.nodeName && elem.nodeName.toLowerCase() === name.toLowerCase();
362         },
364         each: function( obj, callback ) {
365                 var length, i = 0;
367                 if ( isArrayLike( obj ) ) {
368                         length = obj.length;
369                         for ( ; i < length; i++ ) {
370                                 if ( callback.call( obj[ i ], i, obj[ i ] ) === false ) {
371                                         break;
372                                 }
373                         }
374                 } else {
375                         for ( i in obj ) {
376                                 if ( callback.call( obj[ i ], i, obj[ i ] ) === false ) {
377                                         break;
378                                 }
379                         }
380                 }
382                 return obj;
383         },
385         // Support: Android<4.1, IE<9
386         trim: function( text ) {
387                 return text == null ?
388                         "" :
389                         ( text + "" ).replace( rtrim, "" );
390         },
392         // results is for internal usage only
393         makeArray: function( arr, results ) {
394                 var ret = results || [];
396                 if ( arr != null ) {
397                         if ( isArrayLike( Object( arr ) ) ) {
398                                 jQuery.merge( ret,
399                                         typeof arr === "string" ?
400                                         [ arr ] : arr
401                                 );
402                         } else {
403                                 push.call( ret, arr );
404                         }
405                 }
407                 return ret;
408         },
410         inArray: function( elem, arr, i ) {
411                 var len;
413                 if ( arr ) {
414                         if ( indexOf ) {
415                                 return indexOf.call( arr, elem, i );
416                         }
418                         len = arr.length;
419                         i = i ? i < 0 ? Math.max( 0, len + i ) : i : 0;
421                         for ( ; i < len; i++ ) {
423                                 // Skip accessing in sparse arrays
424                                 if ( i in arr && arr[ i ] === elem ) {
425                                         return i;
426                                 }
427                         }
428                 }
430                 return -1;
431         },
433         merge: function( first, second ) {
434                 var len = +second.length,
435                         j = 0,
436                         i = first.length;
438                 while ( j < len ) {
439                         first[ i++ ] = second[ j++ ];
440                 }
442                 // Support: IE<9
443                 // Workaround casting of .length to NaN on otherwise arraylike objects (e.g., NodeLists)
444                 if ( len !== len ) {
445                         while ( second[ j ] !== undefined ) {
446                                 first[ i++ ] = second[ j++ ];
447                         }
448                 }
450                 first.length = i;
452                 return first;
453         },
455         grep: function( elems, callback, invert ) {
456                 var callbackInverse,
457                         matches = [],
458                         i = 0,
459                         length = elems.length,
460                         callbackExpect = !invert;
462                 // Go through the array, only saving the items
463                 // that pass the validator function
464                 for ( ; i < length; i++ ) {
465                         callbackInverse = !callback( elems[ i ], i );
466                         if ( callbackInverse !== callbackExpect ) {
467                                 matches.push( elems[ i ] );
468                         }
469                 }
471                 return matches;
472         },
474         // arg is for internal usage only
475         map: function( elems, callback, arg ) {
476                 var length, value,
477                         i = 0,
478                         ret = [];
480                 // Go through the array, translating each of the items to their new values
481                 if ( isArrayLike( elems ) ) {
482                         length = elems.length;
483                         for ( ; i < length; i++ ) {
484                                 value = callback( elems[ i ], i, arg );
486                                 if ( value != null ) {
487                                         ret.push( value );
488                                 }
489                         }
491                 // Go through every key on the object,
492                 } else {
493                         for ( i in elems ) {
494                                 value = callback( elems[ i ], i, arg );
496                                 if ( value != null ) {
497                                         ret.push( value );
498                                 }
499                         }
500                 }
502                 // Flatten any nested arrays
503                 return concat.apply( [], ret );
504         },
506         // A global GUID counter for objects
507         guid: 1,
509         // Bind a function to a context, optionally partially applying any
510         // arguments.
511         proxy: function( fn, context ) {
512                 var args, proxy, tmp;
514                 if ( typeof context === "string" ) {
515                         tmp = fn[ context ];
516                         context = fn;
517                         fn = tmp;
518                 }
520                 // Quick check to determine if target is callable, in the spec
521                 // this throws a TypeError, but we will just return undefined.
522                 if ( !jQuery.isFunction( fn ) ) {
523                         return undefined;
524                 }
526                 // Simulated bind
527                 args = slice.call( arguments, 2 );
528                 proxy = function() {
529                         return fn.apply( context || this, args.concat( slice.call( arguments ) ) );
530                 };
532                 // Set the guid of unique handler to the same of original handler, so it can be removed
533                 proxy.guid = fn.guid = fn.guid || jQuery.guid++;
535                 return proxy;
536         },
538         now: function() {
539                 return +( new Date() );
540         },
542         // jQuery.support is not used in Core but other projects attach their
543         // properties to it so it needs to exist.
544         support: support
545 } );
547 // JSHint would error on this code due to the Symbol not being defined in ES5.
548 // Defining this global in .jshintrc would create a danger of using the global
549 // unguarded in another place, it seems safer to just disable JSHint for these
550 // three lines.
551 /* jshint ignore: start */
552 if ( typeof Symbol === "function" ) {
553         jQuery.fn[ Symbol.iterator ] = deletedIds[ Symbol.iterator ];
555 /* jshint ignore: end */
557 // Populate the class2type map
558 jQuery.each( "Boolean Number String Function Array Date RegExp Object Error Symbol".split( " " ),
559 function( i, name ) {
560         class2type[ "[object " + name + "]" ] = name.toLowerCase();
561 } );
563 function isArrayLike( obj ) {
565         // Support: iOS 8.2 (not reproducible in simulator)
566         // `in` check used to prevent JIT error (gh-2145)
567         // hasOwn isn't used here due to false negatives
568         // regarding Nodelist length in IE
569         var length = !!obj && "length" in obj && obj.length,
570                 type = jQuery.type( obj );
572         if ( type === "function" || jQuery.isWindow( obj ) ) {
573                 return false;
574         }
576         return type === "array" || length === 0 ||
577                 typeof length === "number" && length > 0 && ( length - 1 ) in obj;
579 var Sizzle =
580 /*!
581  * Sizzle CSS Selector Engine v2.2.1
582  * http://sizzlejs.com/
583  *
584  * Copyright jQuery Foundation and other contributors
585  * Released under the MIT license
586  * http://jquery.org/license
587  *
588  * Date: 2015-10-17
589  */
590 (function( window ) {
592 var i,
593         support,
594         Expr,
595         getText,
596         isXML,
597         tokenize,
598         compile,
599         select,
600         outermostContext,
601         sortInput,
602         hasDuplicate,
604         // Local document vars
605         setDocument,
606         document,
607         docElem,
608         documentIsHTML,
609         rbuggyQSA,
610         rbuggyMatches,
611         matches,
612         contains,
614         // Instance-specific data
615         expando = "sizzle" + 1 * new Date(),
616         preferredDoc = window.document,
617         dirruns = 0,
618         done = 0,
619         classCache = createCache(),
620         tokenCache = createCache(),
621         compilerCache = createCache(),
622         sortOrder = function( a, b ) {
623                 if ( a === b ) {
624                         hasDuplicate = true;
625                 }
626                 return 0;
627         },
629         // General-purpose constants
630         MAX_NEGATIVE = 1 << 31,
632         // Instance methods
633         hasOwn = ({}).hasOwnProperty,
634         arr = [],
635         pop = arr.pop,
636         push_native = arr.push,
637         push = arr.push,
638         slice = arr.slice,
639         // Use a stripped-down indexOf as it's faster than native
640         // http://jsperf.com/thor-indexof-vs-for/5
641         indexOf = function( list, elem ) {
642                 var i = 0,
643                         len = list.length;
644                 for ( ; i < len; i++ ) {
645                         if ( list[i] === elem ) {
646                                 return i;
647                         }
648                 }
649                 return -1;
650         },
652         booleans = "checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped",
654         // Regular expressions
656         // http://www.w3.org/TR/css3-selectors/#whitespace
657         whitespace = "[\\x20\\t\\r\\n\\f]",
659         // http://www.w3.org/TR/CSS21/syndata.html#value-def-identifier
660         identifier = "(?:\\\\.|[\\w-]|[^\\x00-\\xa0])+",
662         // Attribute selectors: http://www.w3.org/TR/selectors/#attribute-selectors
663         attributes = "\\[" + whitespace + "*(" + identifier + ")(?:" + whitespace +
664                 // Operator (capture 2)
665                 "*([*^$|!~]?=)" + whitespace +
666                 // "Attribute values must be CSS identifiers [capture 5] or strings [capture 3 or capture 4]"
667                 "*(?:'((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\"|(" + identifier + "))|)" + whitespace +
668                 "*\\]",
670         pseudos = ":(" + identifier + ")(?:\\((" +
671                 // To reduce the number of selectors needing tokenize in the preFilter, prefer arguments:
672                 // 1. quoted (capture 3; capture 4 or capture 5)
673                 "('((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\")|" +
674                 // 2. simple (capture 6)
675                 "((?:\\\\.|[^\\\\()[\\]]|" + attributes + ")*)|" +
676                 // 3. anything else (capture 2)
677                 ".*" +
678                 ")\\)|)",
680         // Leading and non-escaped trailing whitespace, capturing some non-whitespace characters preceding the latter
681         rwhitespace = new RegExp( whitespace + "+", "g" ),
682         rtrim = new RegExp( "^" + whitespace + "+|((?:^|[^\\\\])(?:\\\\.)*)" + whitespace + "+$", "g" ),
684         rcomma = new RegExp( "^" + whitespace + "*," + whitespace + "*" ),
685         rcombinators = new RegExp( "^" + whitespace + "*([>+~]|" + whitespace + ")" + whitespace + "*" ),
687         rattributeQuotes = new RegExp( "=" + whitespace + "*([^\\]'\"]*?)" + whitespace + "*\\]", "g" ),
689         rpseudo = new RegExp( pseudos ),
690         ridentifier = new RegExp( "^" + identifier + "$" ),
692         matchExpr = {
693                 "ID": new RegExp( "^#(" + identifier + ")" ),
694                 "CLASS": new RegExp( "^\\.(" + identifier + ")" ),
695                 "TAG": new RegExp( "^(" + identifier + "|[*])" ),
696                 "ATTR": new RegExp( "^" + attributes ),
697                 "PSEUDO": new RegExp( "^" + pseudos ),
698                 "CHILD": new RegExp( "^:(only|first|last|nth|nth-last)-(child|of-type)(?:\\(" + whitespace +
699                         "*(even|odd|(([+-]|)(\\d*)n|)" + whitespace + "*(?:([+-]|)" + whitespace +
700                         "*(\\d+)|))" + whitespace + "*\\)|)", "i" ),
701                 "bool": new RegExp( "^(?:" + booleans + ")$", "i" ),
702                 // For use in libraries implementing .is()
703                 // We use this for POS matching in `select`
704                 "needsContext": new RegExp( "^" + whitespace + "*[>+~]|:(even|odd|eq|gt|lt|nth|first|last)(?:\\(" +
705                         whitespace + "*((?:-\\d)?\\d*)" + whitespace + "*\\)|)(?=[^-]|$)", "i" )
706         },
708         rinputs = /^(?:input|select|textarea|button)$/i,
709         rheader = /^h\d$/i,
711         rnative = /^[^{]+\{\s*\[native \w/,
713         // Easily-parseable/retrievable ID or TAG or CLASS selectors
714         rquickExpr = /^(?:#([\w-]+)|(\w+)|\.([\w-]+))$/,
716         rsibling = /[+~]/,
717         rescape = /'|\\/g,
719         // CSS escapes http://www.w3.org/TR/CSS21/syndata.html#escaped-characters
720         runescape = new RegExp( "\\\\([\\da-f]{1,6}" + whitespace + "?|(" + whitespace + ")|.)", "ig" ),
721         funescape = function( _, escaped, escapedWhitespace ) {
722                 var high = "0x" + escaped - 0x10000;
723                 // NaN means non-codepoint
724                 // Support: Firefox<24
725                 // Workaround erroneous numeric interpretation of +"0x"
726                 return high !== high || escapedWhitespace ?
727                         escaped :
728                         high < 0 ?
729                                 // BMP codepoint
730                                 String.fromCharCode( high + 0x10000 ) :
731                                 // Supplemental Plane codepoint (surrogate pair)
732                                 String.fromCharCode( high >> 10 | 0xD800, high & 0x3FF | 0xDC00 );
733         },
735         // Used for iframes
736         // See setDocument()
737         // Removing the function wrapper causes a "Permission Denied"
738         // error in IE
739         unloadHandler = function() {
740                 setDocument();
741         };
743 // Optimize for push.apply( _, NodeList )
744 try {
745         push.apply(
746                 (arr = slice.call( preferredDoc.childNodes )),
747                 preferredDoc.childNodes
748         );
749         // Support: Android<4.0
750         // Detect silently failing push.apply
751         arr[ preferredDoc.childNodes.length ].nodeType;
752 } catch ( e ) {
753         push = { apply: arr.length ?
755                 // Leverage slice if possible
756                 function( target, els ) {
757                         push_native.apply( target, slice.call(els) );
758                 } :
760                 // Support: IE<9
761                 // Otherwise append directly
762                 function( target, els ) {
763                         var j = target.length,
764                                 i = 0;
765                         // Can't trust NodeList.length
766                         while ( (target[j++] = els[i++]) ) {}
767                         target.length = j - 1;
768                 }
769         };
772 function Sizzle( selector, context, results, seed ) {
773         var m, i, elem, nid, nidselect, match, groups, newSelector,
774                 newContext = context && context.ownerDocument,
776                 // nodeType defaults to 9, since context defaults to document
777                 nodeType = context ? context.nodeType : 9;
779         results = results || [];
781         // Return early from calls with invalid selector or context
782         if ( typeof selector !== "string" || !selector ||
783                 nodeType !== 1 && nodeType !== 9 && nodeType !== 11 ) {
785                 return results;
786         }
788         // Try to shortcut find operations (as opposed to filters) in HTML documents
789         if ( !seed ) {
791                 if ( ( context ? context.ownerDocument || context : preferredDoc ) !== document ) {
792                         setDocument( context );
793                 }
794                 context = context || document;
796                 if ( documentIsHTML ) {
798                         // If the selector is sufficiently simple, try using a "get*By*" DOM method
799                         // (excepting DocumentFragment context, where the methods don't exist)
800                         if ( nodeType !== 11 && (match = rquickExpr.exec( selector )) ) {
802                                 // ID selector
803                                 if ( (m = match[1]) ) {
805                                         // Document context
806                                         if ( nodeType === 9 ) {
807                                                 if ( (elem = context.getElementById( m )) ) {
809                                                         // Support: IE, Opera, Webkit
810                                                         // TODO: identify versions
811                                                         // getElementById can match elements by name instead of ID
812                                                         if ( elem.id === m ) {
813                                                                 results.push( elem );
814                                                                 return results;
815                                                         }
816                                                 } else {
817                                                         return results;
818                                                 }
820                                         // Element context
821                                         } else {
823                                                 // Support: IE, Opera, Webkit
824                                                 // TODO: identify versions
825                                                 // getElementById can match elements by name instead of ID
826                                                 if ( newContext && (elem = newContext.getElementById( m )) &&
827                                                         contains( context, elem ) &&
828                                                         elem.id === m ) {
830                                                         results.push( elem );
831                                                         return results;
832                                                 }
833                                         }
835                                 // Type selector
836                                 } else if ( match[2] ) {
837                                         push.apply( results, context.getElementsByTagName( selector ) );
838                                         return results;
840                                 // Class selector
841                                 } else if ( (m = match[3]) && support.getElementsByClassName &&
842                                         context.getElementsByClassName ) {
844                                         push.apply( results, context.getElementsByClassName( m ) );
845                                         return results;
846                                 }
847                         }
849                         // Take advantage of querySelectorAll
850                         if ( support.qsa &&
851                                 !compilerCache[ selector + " " ] &&
852                                 (!rbuggyQSA || !rbuggyQSA.test( selector )) ) {
854                                 if ( nodeType !== 1 ) {
855                                         newContext = context;
856                                         newSelector = selector;
858                                 // qSA looks outside Element context, which is not what we want
859                                 // Thanks to Andrew Dupont for this workaround technique
860                                 // Support: IE <=8
861                                 // Exclude object elements
862                                 } else if ( context.nodeName.toLowerCase() !== "object" ) {
864                                         // Capture the context ID, setting it first if necessary
865                                         if ( (nid = context.getAttribute( "id" )) ) {
866                                                 nid = nid.replace( rescape, "\\$&" );
867                                         } else {
868                                                 context.setAttribute( "id", (nid = expando) );
869                                         }
871                                         // Prefix every selector in the list
872                                         groups = tokenize( selector );
873                                         i = groups.length;
874                                         nidselect = ridentifier.test( nid ) ? "#" + nid : "[id='" + nid + "']";
875                                         while ( i-- ) {
876                                                 groups[i] = nidselect + " " + toSelector( groups[i] );
877                                         }
878                                         newSelector = groups.join( "," );
880                                         // Expand context for sibling selectors
881                                         newContext = rsibling.test( selector ) && testContext( context.parentNode ) ||
882                                                 context;
883                                 }
885                                 if ( newSelector ) {
886                                         try {
887                                                 push.apply( results,
888                                                         newContext.querySelectorAll( newSelector )
889                                                 );
890                                                 return results;
891                                         } catch ( qsaError ) {
892                                         } finally {
893                                                 if ( nid === expando ) {
894                                                         context.removeAttribute( "id" );
895                                                 }
896                                         }
897                                 }
898                         }
899                 }
900         }
902         // All others
903         return select( selector.replace( rtrim, "$1" ), context, results, seed );
906 /**
907  * Create key-value caches of limited size
908  * @returns {function(string, object)} Returns the Object data after storing it on itself with
909  *      property name the (space-suffixed) string and (if the cache is larger than Expr.cacheLength)
910  *      deleting the oldest entry
911  */
912 function createCache() {
913         var keys = [];
915         function cache( key, value ) {
916                 // Use (key + " ") to avoid collision with native prototype properties (see Issue #157)
917                 if ( keys.push( key + " " ) > Expr.cacheLength ) {
918                         // Only keep the most recent entries
919                         delete cache[ keys.shift() ];
920                 }
921                 return (cache[ key + " " ] = value);
922         }
923         return cache;
926 /**
927  * Mark a function for special use by Sizzle
928  * @param {Function} fn The function to mark
929  */
930 function markFunction( fn ) {
931         fn[ expando ] = true;
932         return fn;
935 /**
936  * Support testing using an element
937  * @param {Function} fn Passed the created div and expects a boolean result
938  */
939 function assert( fn ) {
940         var div = document.createElement("div");
942         try {
943                 return !!fn( div );
944         } catch (e) {
945                 return false;
946         } finally {
947                 // Remove from its parent by default
948                 if ( div.parentNode ) {
949                         div.parentNode.removeChild( div );
950                 }
951                 // release memory in IE
952                 div = null;
953         }
956 /**
957  * Adds the same handler for all of the specified attrs
958  * @param {String} attrs Pipe-separated list of attributes
959  * @param {Function} handler The method that will be applied
960  */
961 function addHandle( attrs, handler ) {
962         var arr = attrs.split("|"),
963                 i = arr.length;
965         while ( i-- ) {
966                 Expr.attrHandle[ arr[i] ] = handler;
967         }
970 /**
971  * Checks document order of two siblings
972  * @param {Element} a
973  * @param {Element} b
974  * @returns {Number} Returns less than 0 if a precedes b, greater than 0 if a follows b
975  */
976 function siblingCheck( a, b ) {
977         var cur = b && a,
978                 diff = cur && a.nodeType === 1 && b.nodeType === 1 &&
979                         ( ~b.sourceIndex || MAX_NEGATIVE ) -
980                         ( ~a.sourceIndex || MAX_NEGATIVE );
982         // Use IE sourceIndex if available on both nodes
983         if ( diff ) {
984                 return diff;
985         }
987         // Check if b follows a
988         if ( cur ) {
989                 while ( (cur = cur.nextSibling) ) {
990                         if ( cur === b ) {
991                                 return -1;
992                         }
993                 }
994         }
996         return a ? 1 : -1;
999 /**
1000  * Returns a function to use in pseudos for input types
1001  * @param {String} type
1002  */
1003 function createInputPseudo( type ) {
1004         return function( elem ) {
1005                 var name = elem.nodeName.toLowerCase();
1006                 return name === "input" && elem.type === type;
1007         };
1010 /**
1011  * Returns a function to use in pseudos for buttons
1012  * @param {String} type
1013  */
1014 function createButtonPseudo( type ) {
1015         return function( elem ) {
1016                 var name = elem.nodeName.toLowerCase();
1017                 return (name === "input" || name === "button") && elem.type === type;
1018         };
1021 /**
1022  * Returns a function to use in pseudos for positionals
1023  * @param {Function} fn
1024  */
1025 function createPositionalPseudo( fn ) {
1026         return markFunction(function( argument ) {
1027                 argument = +argument;
1028                 return markFunction(function( seed, matches ) {
1029                         var j,
1030                                 matchIndexes = fn( [], seed.length, argument ),
1031                                 i = matchIndexes.length;
1033                         // Match elements found at the specified indexes
1034                         while ( i-- ) {
1035                                 if ( seed[ (j = matchIndexes[i]) ] ) {
1036                                         seed[j] = !(matches[j] = seed[j]);
1037                                 }
1038                         }
1039                 });
1040         });
1043 /**
1044  * Checks a node for validity as a Sizzle context
1045  * @param {Element|Object=} context
1046  * @returns {Element|Object|Boolean} The input node if acceptable, otherwise a falsy value
1047  */
1048 function testContext( context ) {
1049         return context && typeof context.getElementsByTagName !== "undefined" && context;
1052 // Expose support vars for convenience
1053 support = Sizzle.support = {};
1055 /**
1056  * Detects XML nodes
1057  * @param {Element|Object} elem An element or a document
1058  * @returns {Boolean} True iff elem is a non-HTML XML node
1059  */
1060 isXML = Sizzle.isXML = function( elem ) {
1061         // documentElement is verified for cases where it doesn't yet exist
1062         // (such as loading iframes in IE - #4833)
1063         var documentElement = elem && (elem.ownerDocument || elem).documentElement;
1064         return documentElement ? documentElement.nodeName !== "HTML" : false;
1065 };
1067 /**
1068  * Sets document-related variables once based on the current document
1069  * @param {Element|Object} [doc] An element or document object to use to set the document
1070  * @returns {Object} Returns the current document
1071  */
1072 setDocument = Sizzle.setDocument = function( node ) {
1073         var hasCompare, parent,
1074                 doc = node ? node.ownerDocument || node : preferredDoc;
1076         // Return early if doc is invalid or already selected
1077         if ( doc === document || doc.nodeType !== 9 || !doc.documentElement ) {
1078                 return document;
1079         }
1081         // Update global variables
1082         document = doc;
1083         docElem = document.documentElement;
1084         documentIsHTML = !isXML( document );
1086         // Support: IE 9-11, Edge
1087         // Accessing iframe documents after unload throws "permission denied" errors (jQuery #13936)
1088         if ( (parent = document.defaultView) && parent.top !== parent ) {
1089                 // Support: IE 11
1090                 if ( parent.addEventListener ) {
1091                         parent.addEventListener( "unload", unloadHandler, false );
1093                 // Support: IE 9 - 10 only
1094                 } else if ( parent.attachEvent ) {
1095                         parent.attachEvent( "onunload", unloadHandler );
1096                 }
1097         }
1099         /* Attributes
1100         ---------------------------------------------------------------------- */
1102         // Support: IE<8
1103         // Verify that getAttribute really returns attributes and not properties
1104         // (excepting IE8 booleans)
1105         support.attributes = assert(function( div ) {
1106                 div.className = "i";
1107                 return !div.getAttribute("className");
1108         });
1110         /* getElement(s)By*
1111         ---------------------------------------------------------------------- */
1113         // Check if getElementsByTagName("*") returns only elements
1114         support.getElementsByTagName = assert(function( div ) {
1115                 div.appendChild( document.createComment("") );
1116                 return !div.getElementsByTagName("*").length;
1117         });
1119         // Support: IE<9
1120         support.getElementsByClassName = rnative.test( document.getElementsByClassName );
1122         // Support: IE<10
1123         // Check if getElementById returns elements by name
1124         // The broken getElementById methods don't pick up programatically-set names,
1125         // so use a roundabout getElementsByName test
1126         support.getById = assert(function( div ) {
1127                 docElem.appendChild( div ).id = expando;
1128                 return !document.getElementsByName || !document.getElementsByName( expando ).length;
1129         });
1131         // ID find and filter
1132         if ( support.getById ) {
1133                 Expr.find["ID"] = function( id, context ) {
1134                         if ( typeof context.getElementById !== "undefined" && documentIsHTML ) {
1135                                 var m = context.getElementById( id );
1136                                 return m ? [ m ] : [];
1137                         }
1138                 };
1139                 Expr.filter["ID"] = function( id ) {
1140                         var attrId = id.replace( runescape, funescape );
1141                         return function( elem ) {
1142                                 return elem.getAttribute("id") === attrId;
1143                         };
1144                 };
1145         } else {
1146                 // Support: IE6/7
1147                 // getElementById is not reliable as a find shortcut
1148                 delete Expr.find["ID"];
1150                 Expr.filter["ID"] =  function( id ) {
1151                         var attrId = id.replace( runescape, funescape );
1152                         return function( elem ) {
1153                                 var node = typeof elem.getAttributeNode !== "undefined" &&
1154                                         elem.getAttributeNode("id");
1155                                 return node && node.value === attrId;
1156                         };
1157                 };
1158         }
1160         // Tag
1161         Expr.find["TAG"] = support.getElementsByTagName ?
1162                 function( tag, context ) {
1163                         if ( typeof context.getElementsByTagName !== "undefined" ) {
1164                                 return context.getElementsByTagName( tag );
1166                         // DocumentFragment nodes don't have gEBTN
1167                         } else if ( support.qsa ) {
1168                                 return context.querySelectorAll( tag );
1169                         }
1170                 } :
1172                 function( tag, context ) {
1173                         var elem,
1174                                 tmp = [],
1175                                 i = 0,
1176                                 // By happy coincidence, a (broken) gEBTN appears on DocumentFragment nodes too
1177                                 results = context.getElementsByTagName( tag );
1179                         // Filter out possible comments
1180                         if ( tag === "*" ) {
1181                                 while ( (elem = results[i++]) ) {
1182                                         if ( elem.nodeType === 1 ) {
1183                                                 tmp.push( elem );
1184                                         }
1185                                 }
1187                                 return tmp;
1188                         }
1189                         return results;
1190                 };
1192         // Class
1193         Expr.find["CLASS"] = support.getElementsByClassName && function( className, context ) {
1194                 if ( typeof context.getElementsByClassName !== "undefined" && documentIsHTML ) {
1195                         return context.getElementsByClassName( className );
1196                 }
1197         };
1199         /* QSA/matchesSelector
1200         ---------------------------------------------------------------------- */
1202         // QSA and matchesSelector support
1204         // matchesSelector(:active) reports false when true (IE9/Opera 11.5)
1205         rbuggyMatches = [];
1207         // qSa(:focus) reports false when true (Chrome 21)
1208         // We allow this because of a bug in IE8/9 that throws an error
1209         // whenever `document.activeElement` is accessed on an iframe
1210         // So, we allow :focus to pass through QSA all the time to avoid the IE error
1211         // See http://bugs.jquery.com/ticket/13378
1212         rbuggyQSA = [];
1214         if ( (support.qsa = rnative.test( document.querySelectorAll )) ) {
1215                 // Build QSA regex
1216                 // Regex strategy adopted from Diego Perini
1217                 assert(function( div ) {
1218                         // Select is set to empty string on purpose
1219                         // This is to test IE's treatment of not explicitly
1220                         // setting a boolean content attribute,
1221                         // since its presence should be enough
1222                         // http://bugs.jquery.com/ticket/12359
1223                         docElem.appendChild( div ).innerHTML = "<a id='" + expando + "'></a>" +
1224                                 "<select id='" + expando + "-\r\\' msallowcapture=''>" +
1225                                 "<option selected=''></option></select>";
1227                         // Support: IE8, Opera 11-12.16
1228                         // Nothing should be selected when empty strings follow ^= or $= or *=
1229                         // The test attribute must be unknown in Opera but "safe" for WinRT
1230                         // http://msdn.microsoft.com/en-us/library/ie/hh465388.aspx#attribute_section
1231                         if ( div.querySelectorAll("[msallowcapture^='']").length ) {
1232                                 rbuggyQSA.push( "[*^$]=" + whitespace + "*(?:''|\"\")" );
1233                         }
1235                         // Support: IE8
1236                         // Boolean attributes and "value" are not treated correctly
1237                         if ( !div.querySelectorAll("[selected]").length ) {
1238                                 rbuggyQSA.push( "\\[" + whitespace + "*(?:value|" + booleans + ")" );
1239                         }
1241                         // Support: Chrome<29, Android<4.4, Safari<7.0+, iOS<7.0+, PhantomJS<1.9.8+
1242                         if ( !div.querySelectorAll( "[id~=" + expando + "-]" ).length ) {
1243                                 rbuggyQSA.push("~=");
1244                         }
1246                         // Webkit/Opera - :checked should return selected option elements
1247                         // http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
1248                         // IE8 throws error here and will not see later tests
1249                         if ( !div.querySelectorAll(":checked").length ) {
1250                                 rbuggyQSA.push(":checked");
1251                         }
1253                         // Support: Safari 8+, iOS 8+
1254                         // https://bugs.webkit.org/show_bug.cgi?id=136851
1255                         // In-page `selector#id sibing-combinator selector` fails
1256                         if ( !div.querySelectorAll( "a#" + expando + "+*" ).length ) {
1257                                 rbuggyQSA.push(".#.+[+~]");
1258                         }
1259                 });
1261                 assert(function( div ) {
1262                         // Support: Windows 8 Native Apps
1263                         // The type and name attributes are restricted during .innerHTML assignment
1264                         var input = document.createElement("input");
1265                         input.setAttribute( "type", "hidden" );
1266                         div.appendChild( input ).setAttribute( "name", "D" );
1268                         // Support: IE8
1269                         // Enforce case-sensitivity of name attribute
1270                         if ( div.querySelectorAll("[name=d]").length ) {
1271                                 rbuggyQSA.push( "name" + whitespace + "*[*^$|!~]?=" );
1272                         }
1274                         // FF 3.5 - :enabled/:disabled and hidden elements (hidden elements are still enabled)
1275                         // IE8 throws error here and will not see later tests
1276                         if ( !div.querySelectorAll(":enabled").length ) {
1277                                 rbuggyQSA.push( ":enabled", ":disabled" );
1278                         }
1280                         // Opera 10-11 does not throw on post-comma invalid pseudos
1281                         div.querySelectorAll("*,:x");
1282                         rbuggyQSA.push(",.*:");
1283                 });
1284         }
1286         if ( (support.matchesSelector = rnative.test( (matches = docElem.matches ||
1287                 docElem.webkitMatchesSelector ||
1288                 docElem.mozMatchesSelector ||
1289                 docElem.oMatchesSelector ||
1290                 docElem.msMatchesSelector) )) ) {
1292                 assert(function( div ) {
1293                         // Check to see if it's possible to do matchesSelector
1294                         // on a disconnected node (IE 9)
1295                         support.disconnectedMatch = matches.call( div, "div" );
1297                         // This should fail with an exception
1298                         // Gecko does not error, returns false instead
1299                         matches.call( div, "[s!='']:x" );
1300                         rbuggyMatches.push( "!=", pseudos );
1301                 });
1302         }
1304         rbuggyQSA = rbuggyQSA.length && new RegExp( rbuggyQSA.join("|") );
1305         rbuggyMatches = rbuggyMatches.length && new RegExp( rbuggyMatches.join("|") );
1307         /* Contains
1308         ---------------------------------------------------------------------- */
1309         hasCompare = rnative.test( docElem.compareDocumentPosition );
1311         // Element contains another
1312         // Purposefully self-exclusive
1313         // As in, an element does not contain itself
1314         contains = hasCompare || rnative.test( docElem.contains ) ?
1315                 function( a, b ) {
1316                         var adown = a.nodeType === 9 ? a.documentElement : a,
1317                                 bup = b && b.parentNode;
1318                         return a === bup || !!( bup && bup.nodeType === 1 && (
1319                                 adown.contains ?
1320                                         adown.contains( bup ) :
1321                                         a.compareDocumentPosition && a.compareDocumentPosition( bup ) & 16
1322                         ));
1323                 } :
1324                 function( a, b ) {
1325                         if ( b ) {
1326                                 while ( (b = b.parentNode) ) {
1327                                         if ( b === a ) {
1328                                                 return true;
1329                                         }
1330                                 }
1331                         }
1332                         return false;
1333                 };
1335         /* Sorting
1336         ---------------------------------------------------------------------- */
1338         // Document order sorting
1339         sortOrder = hasCompare ?
1340         function( a, b ) {
1342                 // Flag for duplicate removal
1343                 if ( a === b ) {
1344                         hasDuplicate = true;
1345                         return 0;
1346                 }
1348                 // Sort on method existence if only one input has compareDocumentPosition
1349                 var compare = !a.compareDocumentPosition - !b.compareDocumentPosition;
1350                 if ( compare ) {
1351                         return compare;
1352                 }
1354                 // Calculate position if both inputs belong to the same document
1355                 compare = ( a.ownerDocument || a ) === ( b.ownerDocument || b ) ?
1356                         a.compareDocumentPosition( b ) :
1358                         // Otherwise we know they are disconnected
1359                         1;
1361                 // Disconnected nodes
1362                 if ( compare & 1 ||
1363                         (!support.sortDetached && b.compareDocumentPosition( a ) === compare) ) {
1365                         // Choose the first element that is related to our preferred document
1366                         if ( a === document || a.ownerDocument === preferredDoc && contains(preferredDoc, a) ) {
1367                                 return -1;
1368                         }
1369                         if ( b === document || b.ownerDocument === preferredDoc && contains(preferredDoc, b) ) {
1370                                 return 1;
1371                         }
1373                         // Maintain original order
1374                         return sortInput ?
1375                                 ( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :
1376                                 0;
1377                 }
1379                 return compare & 4 ? -1 : 1;
1380         } :
1381         function( a, b ) {
1382                 // Exit early if the nodes are identical
1383                 if ( a === b ) {
1384                         hasDuplicate = true;
1385                         return 0;
1386                 }
1388                 var cur,
1389                         i = 0,
1390                         aup = a.parentNode,
1391                         bup = b.parentNode,
1392                         ap = [ a ],
1393                         bp = [ b ];
1395                 // Parentless nodes are either documents or disconnected
1396                 if ( !aup || !bup ) {
1397                         return a === document ? -1 :
1398                                 b === document ? 1 :
1399                                 aup ? -1 :
1400                                 bup ? 1 :
1401                                 sortInput ?
1402                                 ( indexOf( sortInput, a ) - indexOf( sortInput, b ) ) :
1403                                 0;
1405                 // If the nodes are siblings, we can do a quick check
1406                 } else if ( aup === bup ) {
1407                         return siblingCheck( a, b );
1408                 }
1410                 // Otherwise we need full lists of their ancestors for comparison
1411                 cur = a;
1412                 while ( (cur = cur.parentNode) ) {
1413                         ap.unshift( cur );
1414                 }
1415                 cur = b;
1416                 while ( (cur = cur.parentNode) ) {
1417                         bp.unshift( cur );
1418                 }
1420                 // Walk down the tree looking for a discrepancy
1421                 while ( ap[i] === bp[i] ) {
1422                         i++;
1423                 }
1425                 return i ?
1426                         // Do a sibling check if the nodes have a common ancestor
1427                         siblingCheck( ap[i], bp[i] ) :
1429                         // Otherwise nodes in our document sort first
1430                         ap[i] === preferredDoc ? -1 :
1431                         bp[i] === preferredDoc ? 1 :
1432                         0;
1433         };
1435         return document;
1436 };
1438 Sizzle.matches = function( expr, elements ) {
1439         return Sizzle( expr, null, null, elements );
1440 };
1442 Sizzle.matchesSelector = function( elem, expr ) {
1443         // Set document vars if needed
1444         if ( ( elem.ownerDocument || elem ) !== document ) {
1445                 setDocument( elem );
1446         }
1448         // Make sure that attribute selectors are quoted
1449         expr = expr.replace( rattributeQuotes, "='$1']" );
1451         if ( support.matchesSelector && documentIsHTML &&
1452                 !compilerCache[ expr + " " ] &&
1453                 ( !rbuggyMatches || !rbuggyMatches.test( expr ) ) &&
1454                 ( !rbuggyQSA     || !rbuggyQSA.test( expr ) ) ) {
1456                 try {
1457                         var ret = matches.call( elem, expr );
1459                         // IE 9's matchesSelector returns false on disconnected nodes
1460                         if ( ret || support.disconnectedMatch ||
1461                                         // As well, disconnected nodes are said to be in a document
1462                                         // fragment in IE 9
1463                                         elem.document && elem.document.nodeType !== 11 ) {
1464                                 return ret;
1465                         }
1466                 } catch (e) {}
1467         }
1469         return Sizzle( expr, document, null, [ elem ] ).length > 0;
1470 };
1472 Sizzle.contains = function( context, elem ) {
1473         // Set document vars if needed
1474         if ( ( context.ownerDocument || context ) !== document ) {
1475                 setDocument( context );
1476         }
1477         return contains( context, elem );
1478 };
1480 Sizzle.attr = function( elem, name ) {
1481         // Set document vars if needed
1482         if ( ( elem.ownerDocument || elem ) !== document ) {
1483                 setDocument( elem );
1484         }
1486         var fn = Expr.attrHandle[ name.toLowerCase() ],
1487                 // Don't get fooled by Object.prototype properties (jQuery #13807)
1488                 val = fn && hasOwn.call( Expr.attrHandle, name.toLowerCase() ) ?
1489                         fn( elem, name, !documentIsHTML ) :
1490                         undefined;
1492         return val !== undefined ?
1493                 val :
1494                 support.attributes || !documentIsHTML ?
1495                         elem.getAttribute( name ) :
1496                         (val = elem.getAttributeNode(name)) && val.specified ?
1497                                 val.value :
1498                                 null;
1499 };
1501 Sizzle.error = function( msg ) {
1502         throw new Error( "Syntax error, unrecognized expression: " + msg );
1503 };
1505 /**
1506  * Document sorting and removing duplicates
1507  * @param {ArrayLike} results
1508  */
1509 Sizzle.uniqueSort = function( results ) {
1510         var elem,
1511                 duplicates = [],
1512                 j = 0,
1513                 i = 0;
1515         // Unless we *know* we can detect duplicates, assume their presence
1516         hasDuplicate = !support.detectDuplicates;
1517         sortInput = !support.sortStable && results.slice( 0 );
1518         results.sort( sortOrder );
1520         if ( hasDuplicate ) {
1521                 while ( (elem = results[i++]) ) {
1522                         if ( elem === results[ i ] ) {
1523                                 j = duplicates.push( i );
1524                         }
1525                 }
1526                 while ( j-- ) {
1527                         results.splice( duplicates[ j ], 1 );
1528                 }
1529         }
1531         // Clear input after sorting to release objects
1532         // See https://github.com/jquery/sizzle/pull/225
1533         sortInput = null;
1535         return results;
1536 };
1538 /**
1539  * Utility function for retrieving the text value of an array of DOM nodes
1540  * @param {Array|Element} elem
1541  */
1542 getText = Sizzle.getText = function( elem ) {
1543         var node,
1544                 ret = "",
1545                 i = 0,
1546                 nodeType = elem.nodeType;
1548         if ( !nodeType ) {
1549                 // If no nodeType, this is expected to be an array
1550                 while ( (node = elem[i++]) ) {
1551                         // Do not traverse comment nodes
1552                         ret += getText( node );
1553                 }
1554         } else if ( nodeType === 1 || nodeType === 9 || nodeType === 11 ) {
1555                 // Use textContent for elements
1556                 // innerText usage removed for consistency of new lines (jQuery #11153)
1557                 if ( typeof elem.textContent === "string" ) {
1558                         return elem.textContent;
1559                 } else {
1560                         // Traverse its children
1561                         for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
1562                                 ret += getText( elem );
1563                         }
1564                 }
1565         } else if ( nodeType === 3 || nodeType === 4 ) {
1566                 return elem.nodeValue;
1567         }
1568         // Do not include comment or processing instruction nodes
1570         return ret;
1571 };
1573 Expr = Sizzle.selectors = {
1575         // Can be adjusted by the user
1576         cacheLength: 50,
1578         createPseudo: markFunction,
1580         match: matchExpr,
1582         attrHandle: {},
1584         find: {},
1586         relative: {
1587                 ">": { dir: "parentNode", first: true },
1588                 " ": { dir: "parentNode" },
1589                 "+": { dir: "previousSibling", first: true },
1590                 "~": { dir: "previousSibling" }
1591         },
1593         preFilter: {
1594                 "ATTR": function( match ) {
1595                         match[1] = match[1].replace( runescape, funescape );
1597                         // Move the given value to match[3] whether quoted or unquoted
1598                         match[3] = ( match[3] || match[4] || match[5] || "" ).replace( runescape, funescape );
1600                         if ( match[2] === "~=" ) {
1601                                 match[3] = " " + match[3] + " ";
1602                         }
1604                         return match.slice( 0, 4 );
1605                 },
1607                 "CHILD": function( match ) {
1608                         /* matches from matchExpr["CHILD"]
1609                                 1 type (only|nth|...)
1610                                 2 what (child|of-type)
1611                                 3 argument (even|odd|\d*|\d*n([+-]\d+)?|...)
1612                                 4 xn-component of xn+y argument ([+-]?\d*n|)
1613                                 5 sign of xn-component
1614                                 6 x of xn-component
1615                                 7 sign of y-component
1616                                 8 y of y-component
1617                         */
1618                         match[1] = match[1].toLowerCase();
1620                         if ( match[1].slice( 0, 3 ) === "nth" ) {
1621                                 // nth-* requires argument
1622                                 if ( !match[3] ) {
1623                                         Sizzle.error( match[0] );
1624                                 }
1626                                 // numeric x and y parameters for Expr.filter.CHILD
1627                                 // remember that false/true cast respectively to 0/1
1628                                 match[4] = +( match[4] ? match[5] + (match[6] || 1) : 2 * ( match[3] === "even" || match[3] === "odd" ) );
1629                                 match[5] = +( ( match[7] + match[8] ) || match[3] === "odd" );
1631                         // other types prohibit arguments
1632                         } else if ( match[3] ) {
1633                                 Sizzle.error( match[0] );
1634                         }
1636                         return match;
1637                 },
1639                 "PSEUDO": function( match ) {
1640                         var excess,
1641                                 unquoted = !match[6] && match[2];
1643                         if ( matchExpr["CHILD"].test( match[0] ) ) {
1644                                 return null;
1645                         }
1647                         // Accept quoted arguments as-is
1648                         if ( match[3] ) {
1649                                 match[2] = match[4] || match[5] || "";
1651                         // Strip excess characters from unquoted arguments
1652                         } else if ( unquoted && rpseudo.test( unquoted ) &&
1653                                 // Get excess from tokenize (recursively)
1654                                 (excess = tokenize( unquoted, true )) &&
1655                                 // advance to the next closing parenthesis
1656                                 (excess = unquoted.indexOf( ")", unquoted.length - excess ) - unquoted.length) ) {
1658                                 // excess is a negative index
1659                                 match[0] = match[0].slice( 0, excess );
1660                                 match[2] = unquoted.slice( 0, excess );
1661                         }
1663                         // Return only captures needed by the pseudo filter method (type and argument)
1664                         return match.slice( 0, 3 );
1665                 }
1666         },
1668         filter: {
1670                 "TAG": function( nodeNameSelector ) {
1671                         var nodeName = nodeNameSelector.replace( runescape, funescape ).toLowerCase();
1672                         return nodeNameSelector === "*" ?
1673                                 function() { return true; } :
1674                                 function( elem ) {
1675                                         return elem.nodeName && elem.nodeName.toLowerCase() === nodeName;
1676                                 };
1677                 },
1679                 "CLASS": function( className ) {
1680                         var pattern = classCache[ className + " " ];
1682                         return pattern ||
1683                                 (pattern = new RegExp( "(^|" + whitespace + ")" + className + "(" + whitespace + "|$)" )) &&
1684                                 classCache( className, function( elem ) {
1685                                         return pattern.test( typeof elem.className === "string" && elem.className || typeof elem.getAttribute !== "undefined" && elem.getAttribute("class") || "" );
1686                                 });
1687                 },
1689                 "ATTR": function( name, operator, check ) {
1690                         return function( elem ) {
1691                                 var result = Sizzle.attr( elem, name );
1693                                 if ( result == null ) {
1694                                         return operator === "!=";
1695                                 }
1696                                 if ( !operator ) {
1697                                         return true;
1698                                 }
1700                                 result += "";
1702                                 return operator === "=" ? result === check :
1703                                         operator === "!=" ? result !== check :
1704                                         operator === "^=" ? check && result.indexOf( check ) === 0 :
1705                                         operator === "*=" ? check && result.indexOf( check ) > -1 :
1706                                         operator === "$=" ? check && result.slice( -check.length ) === check :
1707                                         operator === "~=" ? ( " " + result.replace( rwhitespace, " " ) + " " ).indexOf( check ) > -1 :
1708                                         operator === "|=" ? result === check || result.slice( 0, check.length + 1 ) === check + "-" :
1709                                         false;
1710                         };
1711                 },
1713                 "CHILD": function( type, what, argument, first, last ) {
1714                         var simple = type.slice( 0, 3 ) !== "nth",
1715                                 forward = type.slice( -4 ) !== "last",
1716                                 ofType = what === "of-type";
1718                         return first === 1 && last === 0 ?
1720                                 // Shortcut for :nth-*(n)
1721                                 function( elem ) {
1722                                         return !!elem.parentNode;
1723                                 } :
1725                                 function( elem, context, xml ) {
1726                                         var cache, uniqueCache, outerCache, node, nodeIndex, start,
1727                                                 dir = simple !== forward ? "nextSibling" : "previousSibling",
1728                                                 parent = elem.parentNode,
1729                                                 name = ofType && elem.nodeName.toLowerCase(),
1730                                                 useCache = !xml && !ofType,
1731                                                 diff = false;
1733                                         if ( parent ) {
1735                                                 // :(first|last|only)-(child|of-type)
1736                                                 if ( simple ) {
1737                                                         while ( dir ) {
1738                                                                 node = elem;
1739                                                                 while ( (node = node[ dir ]) ) {
1740                                                                         if ( ofType ?
1741                                                                                 node.nodeName.toLowerCase() === name :
1742                                                                                 node.nodeType === 1 ) {
1744                                                                                 return false;
1745                                                                         }
1746                                                                 }
1747                                                                 // Reverse direction for :only-* (if we haven't yet done so)
1748                                                                 start = dir = type === "only" && !start && "nextSibling";
1749                                                         }
1750                                                         return true;
1751                                                 }
1753                                                 start = [ forward ? parent.firstChild : parent.lastChild ];
1755                                                 // non-xml :nth-child(...) stores cache data on `parent`
1756                                                 if ( forward && useCache ) {
1758                                                         // Seek `elem` from a previously-cached index
1760                                                         // ...in a gzip-friendly way
1761                                                         node = parent;
1762                                                         outerCache = node[ expando ] || (node[ expando ] = {});
1764                                                         // Support: IE <9 only
1765                                                         // Defend against cloned attroperties (jQuery gh-1709)
1766                                                         uniqueCache = outerCache[ node.uniqueID ] ||
1767                                                                 (outerCache[ node.uniqueID ] = {});
1769                                                         cache = uniqueCache[ type ] || [];
1770                                                         nodeIndex = cache[ 0 ] === dirruns && cache[ 1 ];
1771                                                         diff = nodeIndex && cache[ 2 ];
1772                                                         node = nodeIndex && parent.childNodes[ nodeIndex ];
1774                                                         while ( (node = ++nodeIndex && node && node[ dir ] ||
1776                                                                 // Fallback to seeking `elem` from the start
1777                                                                 (diff = nodeIndex = 0) || start.pop()) ) {
1779                                                                 // When found, cache indexes on `parent` and break
1780                                                                 if ( node.nodeType === 1 && ++diff && node === elem ) {
1781                                                                         uniqueCache[ type ] = [ dirruns, nodeIndex, diff ];
1782                                                                         break;
1783                                                                 }
1784                                                         }
1786                                                 } else {
1787                                                         // Use previously-cached element index if available
1788                                                         if ( useCache ) {
1789                                                                 // ...in a gzip-friendly way
1790                                                                 node = elem;
1791                                                                 outerCache = node[ expando ] || (node[ expando ] = {});
1793                                                                 // Support: IE <9 only
1794                                                                 // Defend against cloned attroperties (jQuery gh-1709)
1795                                                                 uniqueCache = outerCache[ node.uniqueID ] ||
1796                                                                         (outerCache[ node.uniqueID ] = {});
1798                                                                 cache = uniqueCache[ type ] || [];
1799                                                                 nodeIndex = cache[ 0 ] === dirruns && cache[ 1 ];
1800                                                                 diff = nodeIndex;
1801                                                         }
1803                                                         // xml :nth-child(...)
1804                                                         // or :nth-last-child(...) or :nth(-last)?-of-type(...)
1805                                                         if ( diff === false ) {
1806                                                                 // Use the same loop as above to seek `elem` from the start
1807                                                                 while ( (node = ++nodeIndex && node && node[ dir ] ||
1808                                                                         (diff = nodeIndex = 0) || start.pop()) ) {
1810                                                                         if ( ( ofType ?
1811                                                                                 node.nodeName.toLowerCase() === name :
1812                                                                                 node.nodeType === 1 ) &&
1813                                                                                 ++diff ) {
1815                                                                                 // Cache the index of each encountered element
1816                                                                                 if ( useCache ) {
1817                                                                                         outerCache = node[ expando ] || (node[ expando ] = {});
1819                                                                                         // Support: IE <9 only
1820                                                                                         // Defend against cloned attroperties (jQuery gh-1709)
1821                                                                                         uniqueCache = outerCache[ node.uniqueID ] ||
1822                                                                                                 (outerCache[ node.uniqueID ] = {});
1824                                                                                         uniqueCache[ type ] = [ dirruns, diff ];
1825                                                                                 }
1827                                                                                 if ( node === elem ) {
1828                                                                                         break;
1829                                                                                 }
1830                                                                         }
1831                                                                 }
1832                                                         }
1833                                                 }
1835                                                 // Incorporate the offset, then check against cycle size
1836                                                 diff -= last;
1837                                                 return diff === first || ( diff % first === 0 && diff / first >= 0 );
1838                                         }
1839                                 };
1840                 },
1842                 "PSEUDO": function( pseudo, argument ) {
1843                         // pseudo-class names are case-insensitive
1844                         // http://www.w3.org/TR/selectors/#pseudo-classes
1845                         // Prioritize by case sensitivity in case custom pseudos are added with uppercase letters
1846                         // Remember that setFilters inherits from pseudos
1847                         var args,
1848                                 fn = Expr.pseudos[ pseudo ] || Expr.setFilters[ pseudo.toLowerCase() ] ||
1849                                         Sizzle.error( "unsupported pseudo: " + pseudo );
1851                         // The user may use createPseudo to indicate that
1852                         // arguments are needed to create the filter function
1853                         // just as Sizzle does
1854                         if ( fn[ expando ] ) {
1855                                 return fn( argument );
1856                         }
1858                         // But maintain support for old signatures
1859                         if ( fn.length > 1 ) {
1860                                 args = [ pseudo, pseudo, "", argument ];
1861                                 return Expr.setFilters.hasOwnProperty( pseudo.toLowerCase() ) ?
1862                                         markFunction(function( seed, matches ) {
1863                                                 var idx,
1864                                                         matched = fn( seed, argument ),
1865                                                         i = matched.length;
1866                                                 while ( i-- ) {
1867                                                         idx = indexOf( seed, matched[i] );
1868                                                         seed[ idx ] = !( matches[ idx ] = matched[i] );
1869                                                 }
1870                                         }) :
1871                                         function( elem ) {
1872                                                 return fn( elem, 0, args );
1873                                         };
1874                         }
1876                         return fn;
1877                 }
1878         },
1880         pseudos: {
1881                 // Potentially complex pseudos
1882                 "not": markFunction(function( selector ) {
1883                         // Trim the selector passed to compile
1884                         // to avoid treating leading and trailing
1885                         // spaces as combinators
1886                         var input = [],
1887                                 results = [],
1888                                 matcher = compile( selector.replace( rtrim, "$1" ) );
1890                         return matcher[ expando ] ?
1891                                 markFunction(function( seed, matches, context, xml ) {
1892                                         var elem,
1893                                                 unmatched = matcher( seed, null, xml, [] ),
1894                                                 i = seed.length;
1896                                         // Match elements unmatched by `matcher`
1897                                         while ( i-- ) {
1898                                                 if ( (elem = unmatched[i]) ) {
1899                                                         seed[i] = !(matches[i] = elem);
1900                                                 }
1901                                         }
1902                                 }) :
1903                                 function( elem, context, xml ) {
1904                                         input[0] = elem;
1905                                         matcher( input, null, xml, results );
1906                                         // Don't keep the element (issue #299)
1907                                         input[0] = null;
1908                                         return !results.pop();
1909                                 };
1910                 }),
1912                 "has": markFunction(function( selector ) {
1913                         return function( elem ) {
1914                                 return Sizzle( selector, elem ).length > 0;
1915                         };
1916                 }),
1918                 "contains": markFunction(function( text ) {
1919                         text = text.replace( runescape, funescape );
1920                         return function( elem ) {
1921                                 return ( elem.textContent || elem.innerText || getText( elem ) ).indexOf( text ) > -1;
1922                         };
1923                 }),
1925                 // "Whether an element is represented by a :lang() selector
1926                 // is based solely on the element's language value
1927                 // being equal to the identifier C,
1928                 // or beginning with the identifier C immediately followed by "-".
1929                 // The matching of C against the element's language value is performed case-insensitively.
1930                 // The identifier C does not have to be a valid language name."
1931                 // http://www.w3.org/TR/selectors/#lang-pseudo
1932                 "lang": markFunction( function( lang ) {
1933                         // lang value must be a valid identifier
1934                         if ( !ridentifier.test(lang || "") ) {
1935                                 Sizzle.error( "unsupported lang: " + lang );
1936                         }
1937                         lang = lang.replace( runescape, funescape ).toLowerCase();
1938                         return function( elem ) {
1939                                 var elemLang;
1940                                 do {
1941                                         if ( (elemLang = documentIsHTML ?
1942                                                 elem.lang :
1943                                                 elem.getAttribute("xml:lang") || elem.getAttribute("lang")) ) {
1945                                                 elemLang = elemLang.toLowerCase();
1946                                                 return elemLang === lang || elemLang.indexOf( lang + "-" ) === 0;
1947                                         }
1948                                 } while ( (elem = elem.parentNode) && elem.nodeType === 1 );
1949                                 return false;
1950                         };
1951                 }),
1953                 // Miscellaneous
1954                 "target": function( elem ) {
1955                         var hash = window.location && window.location.hash;
1956                         return hash && hash.slice( 1 ) === elem.id;
1957                 },
1959                 "root": function( elem ) {
1960                         return elem === docElem;
1961                 },
1963                 "focus": function( elem ) {
1964                         return elem === document.activeElement && (!document.hasFocus || document.hasFocus()) && !!(elem.type || elem.href || ~elem.tabIndex);
1965                 },
1967                 // Boolean properties
1968                 "enabled": function( elem ) {
1969                         return elem.disabled === false;
1970                 },
1972                 "disabled": function( elem ) {
1973                         return elem.disabled === true;
1974                 },
1976                 "checked": function( elem ) {
1977                         // In CSS3, :checked should return both checked and selected elements
1978                         // http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
1979                         var nodeName = elem.nodeName.toLowerCase();
1980                         return (nodeName === "input" && !!elem.checked) || (nodeName === "option" && !!elem.selected);
1981                 },
1983                 "selected": function( elem ) {
1984                         // Accessing this property makes selected-by-default
1985                         // options in Safari work properly
1986                         if ( elem.parentNode ) {
1987                                 elem.parentNode.selectedIndex;
1988                         }
1990                         return elem.selected === true;
1991                 },
1993                 // Contents
1994                 "empty": function( elem ) {
1995                         // http://www.w3.org/TR/selectors/#empty-pseudo
1996                         // :empty is negated by element (1) or content nodes (text: 3; cdata: 4; entity ref: 5),
1997                         //   but not by others (comment: 8; processing instruction: 7; etc.)
1998                         // nodeType < 6 works because attributes (2) do not appear as children
1999                         for ( elem = elem.firstChild; elem; elem = elem.nextSibling ) {
2000                                 if ( elem.nodeType < 6 ) {
2001                                         return false;
2002                                 }
2003                         }
2004                         return true;
2005                 },
2007                 "parent": function( elem ) {
2008                         return !Expr.pseudos["empty"]( elem );
2009                 },
2011                 // Element/input types
2012                 "header": function( elem ) {
2013                         return rheader.test( elem.nodeName );
2014                 },
2016                 "input": function( elem ) {
2017                         return rinputs.test( elem.nodeName );
2018                 },
2020                 "button": function( elem ) {
2021                         var name = elem.nodeName.toLowerCase();
2022                         return name === "input" && elem.type === "button" || name === "button";
2023                 },
2025                 "text": function( elem ) {
2026                         var attr;
2027                         return elem.nodeName.toLowerCase() === "input" &&
2028                                 elem.type === "text" &&
2030                                 // Support: IE<8
2031                                 // New HTML5 attribute values (e.g., "search") appear with elem.type === "text"
2032                                 ( (attr = elem.getAttribute("type")) == null || attr.toLowerCase() === "text" );
2033                 },
2035                 // Position-in-collection
2036                 "first": createPositionalPseudo(function() {
2037                         return [ 0 ];
2038                 }),
2040                 "last": createPositionalPseudo(function( matchIndexes, length ) {
2041                         return [ length - 1 ];
2042                 }),
2044                 "eq": createPositionalPseudo(function( matchIndexes, length, argument ) {
2045                         return [ argument < 0 ? argument + length : argument ];
2046                 }),
2048                 "even": createPositionalPseudo(function( matchIndexes, length ) {
2049                         var i = 0;
2050                         for ( ; i < length; i += 2 ) {
2051                                 matchIndexes.push( i );
2052                         }
2053                         return matchIndexes;
2054                 }),
2056                 "odd": createPositionalPseudo(function( matchIndexes, length ) {
2057                         var i = 1;
2058                         for ( ; i < length; i += 2 ) {
2059                                 matchIndexes.push( i );
2060                         }
2061                         return matchIndexes;
2062                 }),
2064                 "lt": createPositionalPseudo(function( matchIndexes, length, argument ) {
2065                         var i = argument < 0 ? argument + length : argument;
2066                         for ( ; --i >= 0; ) {
2067                                 matchIndexes.push( i );
2068                         }
2069                         return matchIndexes;
2070                 }),
2072                 "gt": createPositionalPseudo(function( matchIndexes, length, argument ) {
2073                         var i = argument < 0 ? argument + length : argument;
2074                         for ( ; ++i < length; ) {
2075                                 matchIndexes.push( i );
2076                         }
2077                         return matchIndexes;
2078                 })
2079         }
2080 };
2082 Expr.pseudos["nth"] = Expr.pseudos["eq"];
2084 // Add button/input type pseudos
2085 for ( i in { radio: true, checkbox: true, file: true, password: true, image: true } ) {
2086         Expr.pseudos[ i ] = createInputPseudo( i );
2088 for ( i in { submit: true, reset: true } ) {
2089         Expr.pseudos[ i ] = createButtonPseudo( i );
2092 // Easy API for creating new setFilters
2093 function setFilters() {}
2094 setFilters.prototype = Expr.filters = Expr.pseudos;
2095 Expr.setFilters = new setFilters();
2097 tokenize = Sizzle.tokenize = function( selector, parseOnly ) {
2098         var matched, match, tokens, type,
2099                 soFar, groups, preFilters,
2100                 cached = tokenCache[ selector + " " ];
2102         if ( cached ) {
2103                 return parseOnly ? 0 : cached.slice( 0 );
2104         }
2106         soFar = selector;
2107         groups = [];
2108         preFilters = Expr.preFilter;
2110         while ( soFar ) {
2112                 // Comma and first run
2113                 if ( !matched || (match = rcomma.exec( soFar )) ) {
2114                         if ( match ) {
2115                                 // Don't consume trailing commas as valid
2116                                 soFar = soFar.slice( match[0].length ) || soFar;
2117                         }
2118                         groups.push( (tokens = []) );
2119                 }
2121                 matched = false;
2123                 // Combinators
2124                 if ( (match = rcombinators.exec( soFar )) ) {
2125                         matched = match.shift();
2126                         tokens.push({
2127                                 value: matched,
2128                                 // Cast descendant combinators to space
2129                                 type: match[0].replace( rtrim, " " )
2130                         });
2131                         soFar = soFar.slice( matched.length );
2132                 }
2134                 // Filters
2135                 for ( type in Expr.filter ) {
2136                         if ( (match = matchExpr[ type ].exec( soFar )) && (!preFilters[ type ] ||
2137                                 (match = preFilters[ type ]( match ))) ) {
2138                                 matched = match.shift();
2139                                 tokens.push({
2140                                         value: matched,
2141                                         type: type,
2142                                         matches: match
2143                                 });
2144                                 soFar = soFar.slice( matched.length );
2145                         }
2146                 }
2148                 if ( !matched ) {
2149                         break;
2150                 }
2151         }
2153         // Return the length of the invalid excess
2154         // if we're just parsing
2155         // Otherwise, throw an error or return tokens
2156         return parseOnly ?
2157                 soFar.length :
2158                 soFar ?
2159                         Sizzle.error( selector ) :
2160                         // Cache the tokens
2161                         tokenCache( selector, groups ).slice( 0 );
2162 };
2164 function toSelector( tokens ) {
2165         var i = 0,
2166                 len = tokens.length,
2167                 selector = "";
2168         for ( ; i < len; i++ ) {
2169                 selector += tokens[i].value;
2170         }
2171         return selector;
2174 function addCombinator( matcher, combinator, base ) {
2175         var dir = combinator.dir,
2176                 checkNonElements = base && dir === "parentNode",
2177                 doneName = done++;
2179         return combinator.first ?
2180                 // Check against closest ancestor/preceding element
2181                 function( elem, context, xml ) {
2182                         while ( (elem = elem[ dir ]) ) {
2183                                 if ( elem.nodeType === 1 || checkNonElements ) {
2184                                         return matcher( elem, context, xml );
2185                                 }
2186                         }
2187                 } :
2189                 // Check against all ancestor/preceding elements
2190                 function( elem, context, xml ) {
2191                         var oldCache, uniqueCache, outerCache,
2192                                 newCache = [ dirruns, doneName ];
2194                         // We can't set arbitrary data on XML nodes, so they don't benefit from combinator caching
2195                         if ( xml ) {
2196                                 while ( (elem = elem[ dir ]) ) {
2197                                         if ( elem.nodeType === 1 || checkNonElements ) {
2198                                                 if ( matcher( elem, context, xml ) ) {
2199                                                         return true;
2200                                                 }
2201                                         }
2202                                 }
2203                         } else {
2204                                 while ( (elem = elem[ dir ]) ) {
2205                                         if ( elem.nodeType === 1 || checkNonElements ) {
2206                                                 outerCache = elem[ expando ] || (elem[ expando ] = {});
2208                                                 // Support: IE <9 only
2209                                                 // Defend against cloned attroperties (jQuery gh-1709)
2210                                                 uniqueCache = outerCache[ elem.uniqueID ] || (outerCache[ elem.uniqueID ] = {});
2212                                                 if ( (oldCache = uniqueCache[ dir ]) &&
2213                                                         oldCache[ 0 ] === dirruns && oldCache[ 1 ] === doneName ) {
2215                                                         // Assign to newCache so results back-propagate to previous elements
2216                                                         return (newCache[ 2 ] = oldCache[ 2 ]);
2217                                                 } else {
2218                                                         // Reuse newcache so results back-propagate to previous elements
2219                                                         uniqueCache[ dir ] = newCache;
2221                                                         // A match means we're done; a fail means we have to keep checking
2222                                                         if ( (newCache[ 2 ] = matcher( elem, context, xml )) ) {
2223                                                                 return true;
2224                                                         }
2225                                                 }
2226                                         }
2227                                 }
2228                         }
2229                 };
2232 function elementMatcher( matchers ) {
2233         return matchers.length > 1 ?
2234                 function( elem, context, xml ) {
2235                         var i = matchers.length;
2236                         while ( i-- ) {
2237                                 if ( !matchers[i]( elem, context, xml ) ) {
2238                                         return false;
2239                                 }
2240                         }
2241                         return true;
2242                 } :
2243                 matchers[0];
2246 function multipleContexts( selector, contexts, results ) {
2247         var i = 0,
2248                 len = contexts.length;
2249         for ( ; i < len; i++ ) {
2250                 Sizzle( selector, contexts[i], results );
2251         }
2252         return results;
2255 function condense( unmatched, map, filter, context, xml ) {
2256         var elem,
2257                 newUnmatched = [],
2258                 i = 0,
2259                 len = unmatched.length,
2260                 mapped = map != null;
2262         for ( ; i < len; i++ ) {
2263                 if ( (elem = unmatched[i]) ) {
2264                         if ( !filter || filter( elem, context, xml ) ) {
2265                                 newUnmatched.push( elem );
2266                                 if ( mapped ) {
2267                                         map.push( i );
2268                                 }
2269                         }
2270                 }
2271         }
2273         return newUnmatched;
2276 function setMatcher( preFilter, selector, matcher, postFilter, postFinder, postSelector ) {
2277         if ( postFilter && !postFilter[ expando ] ) {
2278                 postFilter = setMatcher( postFilter );
2279         }
2280         if ( postFinder && !postFinder[ expando ] ) {
2281                 postFinder = setMatcher( postFinder, postSelector );
2282         }
2283         return markFunction(function( seed, results, context, xml ) {
2284                 var temp, i, elem,
2285                         preMap = [],
2286                         postMap = [],
2287                         preexisting = results.length,
2289                         // Get initial elements from seed or context
2290                         elems = seed || multipleContexts( selector || "*", context.nodeType ? [ context ] : context, [] ),
2292                         // Prefilter to get matcher input, preserving a map for seed-results synchronization
2293                         matcherIn = preFilter && ( seed || !selector ) ?
2294                                 condense( elems, preMap, preFilter, context, xml ) :
2295                                 elems,
2297                         matcherOut = matcher ?
2298                                 // If we have a postFinder, or filtered seed, or non-seed postFilter or preexisting results,
2299                                 postFinder || ( seed ? preFilter : preexisting || postFilter ) ?
2301                                         // ...intermediate processing is necessary
2302                                         [] :
2304                                         // ...otherwise use results directly
2305                                         results :
2306                                 matcherIn;
2308                 // Find primary matches
2309                 if ( matcher ) {
2310                         matcher( matcherIn, matcherOut, context, xml );
2311                 }
2313                 // Apply postFilter
2314                 if ( postFilter ) {
2315                         temp = condense( matcherOut, postMap );
2316                         postFilter( temp, [], context, xml );
2318                         // Un-match failing elements by moving them back to matcherIn
2319                         i = temp.length;
2320                         while ( i-- ) {
2321                                 if ( (elem = temp[i]) ) {
2322                                         matcherOut[ postMap[i] ] = !(matcherIn[ postMap[i] ] = elem);
2323                                 }
2324                         }
2325                 }
2327                 if ( seed ) {
2328                         if ( postFinder || preFilter ) {
2329                                 if ( postFinder ) {
2330                                         // Get the final matcherOut by condensing this intermediate into postFinder contexts
2331                                         temp = [];
2332                                         i = matcherOut.length;
2333                                         while ( i-- ) {
2334                                                 if ( (elem = matcherOut[i]) ) {
2335                                                         // Restore matcherIn since elem is not yet a final match
2336                                                         temp.push( (matcherIn[i] = elem) );
2337                                                 }
2338                                         }
2339                                         postFinder( null, (matcherOut = []), temp, xml );
2340                                 }
2342                                 // Move matched elements from seed to results to keep them synchronized
2343                                 i = matcherOut.length;
2344                                 while ( i-- ) {
2345                                         if ( (elem = matcherOut[i]) &&
2346                                                 (temp = postFinder ? indexOf( seed, elem ) : preMap[i]) > -1 ) {
2348                                                 seed[temp] = !(results[temp] = elem);
2349                                         }
2350                                 }
2351                         }
2353                 // Add elements to results, through postFinder if defined
2354                 } else {
2355                         matcherOut = condense(
2356                                 matcherOut === results ?
2357                                         matcherOut.splice( preexisting, matcherOut.length ) :
2358                                         matcherOut
2359                         );
2360                         if ( postFinder ) {
2361                                 postFinder( null, results, matcherOut, xml );
2362                         } else {
2363                                 push.apply( results, matcherOut );
2364                         }
2365                 }
2366         });
2369 function matcherFromTokens( tokens ) {
2370         var checkContext, matcher, j,
2371                 len = tokens.length,
2372                 leadingRelative = Expr.relative[ tokens[0].type ],
2373                 implicitRelative = leadingRelative || Expr.relative[" "],
2374                 i = leadingRelative ? 1 : 0,
2376                 // The foundational matcher ensures that elements are reachable from top-level context(s)
2377                 matchContext = addCombinator( function( elem ) {
2378                         return elem === checkContext;
2379                 }, implicitRelative, true ),
2380                 matchAnyContext = addCombinator( function( elem ) {
2381                         return indexOf( checkContext, elem ) > -1;
2382                 }, implicitRelative, true ),
2383                 matchers = [ function( elem, context, xml ) {
2384                         var ret = ( !leadingRelative && ( xml || context !== outermostContext ) ) || (
2385                                 (checkContext = context).nodeType ?
2386                                         matchContext( elem, context, xml ) :
2387                                         matchAnyContext( elem, context, xml ) );
2388                         // Avoid hanging onto element (issue #299)
2389                         checkContext = null;
2390                         return ret;
2391                 } ];
2393         for ( ; i < len; i++ ) {
2394                 if ( (matcher = Expr.relative[ tokens[i].type ]) ) {
2395                         matchers = [ addCombinator(elementMatcher( matchers ), matcher) ];
2396                 } else {
2397                         matcher = Expr.filter[ tokens[i].type ].apply( null, tokens[i].matches );
2399                         // Return special upon seeing a positional matcher
2400                         if ( matcher[ expando ] ) {
2401                                 // Find the next relative operator (if any) for proper handling
2402                                 j = ++i;
2403                                 for ( ; j < len; j++ ) {
2404                                         if ( Expr.relative[ tokens[j].type ] ) {
2405                                                 break;
2406                                         }
2407                                 }
2408                                 return setMatcher(
2409                                         i > 1 && elementMatcher( matchers ),
2410                                         i > 1 && toSelector(
2411                                                 // If the preceding token was a descendant combinator, insert an implicit any-element `*`
2412                                                 tokens.slice( 0, i - 1 ).concat({ value: tokens[ i - 2 ].type === " " ? "*" : "" })
2413                                         ).replace( rtrim, "$1" ),
2414                                         matcher,
2415                                         i < j && matcherFromTokens( tokens.slice( i, j ) ),
2416                                         j < len && matcherFromTokens( (tokens = tokens.slice( j )) ),
2417                                         j < len && toSelector( tokens )
2418                                 );
2419                         }
2420                         matchers.push( matcher );
2421                 }
2422         }
2424         return elementMatcher( matchers );
2427 function matcherFromGroupMatchers( elementMatchers, setMatchers ) {
2428         var bySet = setMatchers.length > 0,
2429                 byElement = elementMatchers.length > 0,
2430                 superMatcher = function( seed, context, xml, results, outermost ) {
2431                         var elem, j, matcher,
2432                                 matchedCount = 0,
2433                                 i = "0",
2434                                 unmatched = seed && [],
2435                                 setMatched = [],
2436                                 contextBackup = outermostContext,
2437                                 // We must always have either seed elements or outermost context
2438                                 elems = seed || byElement && Expr.find["TAG"]( "*", outermost ),
2439                                 // Use integer dirruns iff this is the outermost matcher
2440                                 dirrunsUnique = (dirruns += contextBackup == null ? 1 : Math.random() || 0.1),
2441                                 len = elems.length;
2443                         if ( outermost ) {
2444                                 outermostContext = context === document || context || outermost;
2445                         }
2447                         // Add elements passing elementMatchers directly to results
2448                         // Support: IE<9, Safari
2449                         // Tolerate NodeList properties (IE: "length"; Safari: <number>) matching elements by id
2450                         for ( ; i !== len && (elem = elems[i]) != null; i++ ) {
2451                                 if ( byElement && elem ) {
2452                                         j = 0;
2453                                         if ( !context && elem.ownerDocument !== document ) {
2454                                                 setDocument( elem );
2455                                                 xml = !documentIsHTML;
2456                                         }
2457                                         while ( (matcher = elementMatchers[j++]) ) {
2458                                                 if ( matcher( elem, context || document, xml) ) {
2459                                                         results.push( elem );
2460                                                         break;
2461                                                 }
2462                                         }
2463                                         if ( outermost ) {
2464                                                 dirruns = dirrunsUnique;
2465                                         }
2466                                 }
2468                                 // Track unmatched elements for set filters
2469                                 if ( bySet ) {
2470                                         // They will have gone through all possible matchers
2471                                         if ( (elem = !matcher && elem) ) {
2472                                                 matchedCount--;
2473                                         }
2475                                         // Lengthen the array for every element, matched or not
2476                                         if ( seed ) {
2477                                                 unmatched.push( elem );
2478                                         }
2479                                 }
2480                         }
2482                         // `i` is now the count of elements visited above, and adding it to `matchedCount`
2483                         // makes the latter nonnegative.
2484                         matchedCount += i;
2486                         // Apply set filters to unmatched elements
2487                         // NOTE: This can be skipped if there are no unmatched elements (i.e., `matchedCount`
2488                         // equals `i`), unless we didn't visit _any_ elements in the above loop because we have
2489                         // no element matchers and no seed.
2490                         // Incrementing an initially-string "0" `i` allows `i` to remain a string only in that
2491                         // case, which will result in a "00" `matchedCount` that differs from `i` but is also
2492                         // numerically zero.
2493                         if ( bySet && i !== matchedCount ) {
2494                                 j = 0;
2495                                 while ( (matcher = setMatchers[j++]) ) {
2496                                         matcher( unmatched, setMatched, context, xml );
2497                                 }
2499                                 if ( seed ) {
2500                                         // Reintegrate element matches to eliminate the need for sorting
2501                                         if ( matchedCount > 0 ) {
2502                                                 while ( i-- ) {
2503                                                         if ( !(unmatched[i] || setMatched[i]) ) {
2504                                                                 setMatched[i] = pop.call( results );
2505                                                         }
2506                                                 }
2507                                         }
2509                                         // Discard index placeholder values to get only actual matches
2510                                         setMatched = condense( setMatched );
2511                                 }
2513                                 // Add matches to results
2514                                 push.apply( results, setMatched );
2516                                 // Seedless set matches succeeding multiple successful matchers stipulate sorting
2517                                 if ( outermost && !seed && setMatched.length > 0 &&
2518                                         ( matchedCount + setMatchers.length ) > 1 ) {
2520                                         Sizzle.uniqueSort( results );
2521                                 }
2522                         }
2524                         // Override manipulation of globals by nested matchers
2525                         if ( outermost ) {
2526                                 dirruns = dirrunsUnique;
2527                                 outermostContext = contextBackup;
2528                         }
2530                         return unmatched;
2531                 };
2533         return bySet ?
2534                 markFunction( superMatcher ) :
2535                 superMatcher;
2538 compile = Sizzle.compile = function( selector, match /* Internal Use Only */ ) {
2539         var i,
2540                 setMatchers = [],
2541                 elementMatchers = [],
2542                 cached = compilerCache[ selector + " " ];
2544         if ( !cached ) {
2545                 // Generate a function of recursive functions that can be used to check each element
2546                 if ( !match ) {
2547                         match = tokenize( selector );
2548                 }
2549                 i = match.length;
2550                 while ( i-- ) {
2551                         cached = matcherFromTokens( match[i] );
2552                         if ( cached[ expando ] ) {
2553                                 setMatchers.push( cached );
2554                         } else {
2555                                 elementMatchers.push( cached );
2556                         }
2557                 }
2559                 // Cache the compiled function
2560                 cached = compilerCache( selector, matcherFromGroupMatchers( elementMatchers, setMatchers ) );
2562                 // Save selector and tokenization
2563                 cached.selector = selector;
2564         }
2565         return cached;
2566 };
2568 /**
2569  * A low-level selection function that works with Sizzle's compiled
2570  *  selector functions
2571  * @param {String|Function} selector A selector or a pre-compiled
2572  *  selector function built with Sizzle.compile
2573  * @param {Element} context
2574  * @param {Array} [results]
2575  * @param {Array} [seed] A set of elements to match against
2576  */
2577 select = Sizzle.select = function( selector, context, results, seed ) {
2578         var i, tokens, token, type, find,
2579                 compiled = typeof selector === "function" && selector,
2580                 match = !seed && tokenize( (selector = compiled.selector || selector) );
2582         results = results || [];
2584         // Try to minimize operations if there is only one selector in the list and no seed
2585         // (the latter of which guarantees us context)
2586         if ( match.length === 1 ) {
2588                 // Reduce context if the leading compound selector is an ID
2589                 tokens = match[0] = match[0].slice( 0 );
2590                 if ( tokens.length > 2 && (token = tokens[0]).type === "ID" &&
2591                                 support.getById && context.nodeType === 9 && documentIsHTML &&
2592                                 Expr.relative[ tokens[1].type ] ) {
2594                         context = ( Expr.find["ID"]( token.matches[0].replace(runescape, funescape), context ) || [] )[0];
2595                         if ( !context ) {
2596                                 return results;
2598                         // Precompiled matchers will still verify ancestry, so step up a level
2599                         } else if ( compiled ) {
2600                                 context = context.parentNode;
2601                         }
2603                         selector = selector.slice( tokens.shift().value.length );
2604                 }
2606                 // Fetch a seed set for right-to-left matching
2607                 i = matchExpr["needsContext"].test( selector ) ? 0 : tokens.length;
2608                 while ( i-- ) {
2609                         token = tokens[i];
2611                         // Abort if we hit a combinator
2612                         if ( Expr.relative[ (type = token.type) ] ) {
2613                                 break;
2614                         }
2615                         if ( (find = Expr.find[ type ]) ) {
2616                                 // Search, expanding context for leading sibling combinators
2617                                 if ( (seed = find(
2618                                         token.matches[0].replace( runescape, funescape ),
2619                                         rsibling.test( tokens[0].type ) && testContext( context.parentNode ) || context
2620                                 )) ) {
2622                                         // If seed is empty or no tokens remain, we can return early
2623                                         tokens.splice( i, 1 );
2624                                         selector = seed.length && toSelector( tokens );
2625                                         if ( !selector ) {
2626                                                 push.apply( results, seed );
2627                                                 return results;
2628                                         }
2630                                         break;
2631                                 }
2632                         }
2633                 }
2634         }
2636         // Compile and execute a filtering function if one is not provided
2637         // Provide `match` to avoid retokenization if we modified the selector above
2638         ( compiled || compile( selector, match ) )(
2639                 seed,
2640                 context,
2641                 !documentIsHTML,
2642                 results,
2643                 !context || rsibling.test( selector ) && testContext( context.parentNode ) || context
2644         );
2645         return results;
2646 };
2648 // One-time assignments
2650 // Sort stability
2651 support.sortStable = expando.split("").sort( sortOrder ).join("") === expando;
2653 // Support: Chrome 14-35+
2654 // Always assume duplicates if they aren't passed to the comparison function
2655 support.detectDuplicates = !!hasDuplicate;
2657 // Initialize against the default document
2658 setDocument();
2660 // Support: Webkit<537.32 - Safari 6.0.3/Chrome 25 (fixed in Chrome 27)
2661 // Detached nodes confoundingly follow *each other*
2662 support.sortDetached = assert(function( div1 ) {
2663         // Should return 1, but returns 4 (following)
2664         return div1.compareDocumentPosition( document.createElement("div") ) & 1;
2665 });
2667 // Support: IE<8
2668 // Prevent attribute/property "interpolation"
2669 // http://msdn.microsoft.com/en-us/library/ms536429%28VS.85%29.aspx
2670 if ( !assert(function( div ) {
2671         div.innerHTML = "<a href='#'></a>";
2672         return div.firstChild.getAttribute("href") === "#" ;
2673 }) ) {
2674         addHandle( "type|href|height|width", function( elem, name, isXML ) {
2675                 if ( !isXML ) {
2676                         return elem.getAttribute( name, name.toLowerCase() === "type" ? 1 : 2 );
2677                 }
2678         });
2681 // Support: IE<9
2682 // Use defaultValue in place of getAttribute("value")
2683 if ( !support.attributes || !assert(function( div ) {
2684         div.innerHTML = "<input/>";
2685         div.firstChild.setAttribute( "value", "" );
2686         return div.firstChild.getAttribute( "value" ) === "";
2687 }) ) {
2688         addHandle( "value", function( elem, name, isXML ) {
2689                 if ( !isXML && elem.nodeName.toLowerCase() === "input" ) {
2690                         return elem.defaultValue;
2691                 }
2692         });
2695 // Support: IE<9
2696 // Use getAttributeNode to fetch booleans when getAttribute lies
2697 if ( !assert(function( div ) {
2698         return div.getAttribute("disabled") == null;
2699 }) ) {
2700         addHandle( booleans, function( elem, name, isXML ) {
2701                 var val;
2702                 if ( !isXML ) {
2703                         return elem[ name ] === true ? name.toLowerCase() :
2704                                         (val = elem.getAttributeNode( name )) && val.specified ?
2705                                         val.value :
2706                                 null;
2707                 }
2708         });
2711 return Sizzle;
2713 })( window );
2717 jQuery.find = Sizzle;
2718 jQuery.expr = Sizzle.selectors;
2719 jQuery.expr[ ":" ] = jQuery.expr.pseudos;
2720 jQuery.uniqueSort = jQuery.unique = Sizzle.uniqueSort;
2721 jQuery.text = Sizzle.getText;
2722 jQuery.isXMLDoc = Sizzle.isXML;
2723 jQuery.contains = Sizzle.contains;
2727 var dir = function( elem, dir, until ) {
2728         var matched = [],
2729                 truncate = until !== undefined;
2731         while ( ( elem = elem[ dir ] ) && elem.nodeType !== 9 ) {
2732                 if ( elem.nodeType === 1 ) {
2733                         if ( truncate && jQuery( elem ).is( until ) ) {
2734                                 break;
2735                         }
2736                         matched.push( elem );
2737                 }
2738         }
2739         return matched;
2740 };
2743 var siblings = function( n, elem ) {
2744         var matched = [];
2746         for ( ; n; n = n.nextSibling ) {
2747                 if ( n.nodeType === 1 && n !== elem ) {
2748                         matched.push( n );
2749                 }
2750         }
2752         return matched;
2753 };
2756 var rneedsContext = jQuery.expr.match.needsContext;
2758 var rsingleTag = ( /^<([\w-]+)\s*\/?>(?:<\/\1>|)$/ );
2762 var risSimple = /^.[^:#\[\.,]*$/;
2764 // Implement the identical functionality for filter and not
2765 function winnow( elements, qualifier, not ) {
2766         if ( jQuery.isFunction( qualifier ) ) {
2767                 return jQuery.grep( elements, function( elem, i ) {
2768                         /* jshint -W018 */
2769                         return !!qualifier.call( elem, i, elem ) !== not;
2770                 } );
2772         }
2774         if ( qualifier.nodeType ) {
2775                 return jQuery.grep( elements, function( elem ) {
2776                         return ( elem === qualifier ) !== not;
2777                 } );
2779         }
2781         if ( typeof qualifier === "string" ) {
2782                 if ( risSimple.test( qualifier ) ) {
2783                         return jQuery.filter( qualifier, elements, not );
2784                 }
2786                 qualifier = jQuery.filter( qualifier, elements );
2787         }
2789         return jQuery.grep( elements, function( elem ) {
2790                 return ( jQuery.inArray( elem, qualifier ) > -1 ) !== not;
2791         } );
2794 jQuery.filter = function( expr, elems, not ) {
2795         var elem = elems[ 0 ];
2797         if ( not ) {
2798                 expr = ":not(" + expr + ")";
2799         }
2801         return elems.length === 1 && elem.nodeType === 1 ?
2802                 jQuery.find.matchesSelector( elem, expr ) ? [ elem ] : [] :
2803                 jQuery.find.matches( expr, jQuery.grep( elems, function( elem ) {
2804                         return elem.nodeType === 1;
2805                 } ) );
2806 };
2808 jQuery.fn.extend( {
2809         find: function( selector ) {
2810                 var i,
2811                         ret = [],
2812                         self = this,
2813                         len = self.length;
2815                 if ( typeof selector !== "string" ) {
2816                         return this.pushStack( jQuery( selector ).filter( function() {
2817                                 for ( i = 0; i < len; i++ ) {
2818                                         if ( jQuery.contains( self[ i ], this ) ) {
2819                                                 return true;
2820                                         }
2821                                 }
2822                         } ) );
2823                 }
2825                 for ( i = 0; i < len; i++ ) {
2826                         jQuery.find( selector, self[ i ], ret );
2827                 }
2829                 // Needed because $( selector, context ) becomes $( context ).find( selector )
2830                 ret = this.pushStack( len > 1 ? jQuery.unique( ret ) : ret );
2831                 ret.selector = this.selector ? this.selector + " " + selector : selector;
2832                 return ret;
2833         },
2834         filter: function( selector ) {
2835                 return this.pushStack( winnow( this, selector || [], false ) );
2836         },
2837         not: function( selector ) {
2838                 return this.pushStack( winnow( this, selector || [], true ) );
2839         },
2840         is: function( selector ) {
2841                 return !!winnow(
2842                         this,
2844                         // If this is a positional/relative selector, check membership in the returned set
2845                         // so $("p:first").is("p:last") won't return true for a doc with two "p".
2846                         typeof selector === "string" && rneedsContext.test( selector ) ?
2847                                 jQuery( selector ) :
2848                                 selector || [],
2849                         false
2850                 ).length;
2851         }
2852 } );
2855 // Initialize a jQuery object
2858 // A central reference to the root jQuery(document)
2859 var rootjQuery,
2861         // A simple way to check for HTML strings
2862         // Prioritize #id over <tag> to avoid XSS via location.hash (#9521)
2863         // Strict HTML recognition (#11290: must start with <)
2864         rquickExpr = /^(?:\s*(<[\w\W]+>)[^>]*|#([\w-]*))$/,
2866         init = jQuery.fn.init = function( selector, context, root ) {
2867                 var match, elem;
2869                 // HANDLE: $(""), $(null), $(undefined), $(false)
2870                 if ( !selector ) {
2871                         return this;
2872                 }
2874                 // init accepts an alternate rootjQuery
2875                 // so migrate can support jQuery.sub (gh-2101)
2876                 root = root || rootjQuery;
2878                 // Handle HTML strings
2879                 if ( typeof selector === "string" ) {
2880                         if ( selector.charAt( 0 ) === "<" &&
2881                     &n