src/selector.js

   1 /*!
   2  * Sizzle CSS Selector Engine - v0.9.1
   3  *  Copyright 2009, The Dojo Foundation
   4  *  Released under the MIT, BSD, and GPL Licenses.
   5  *  More information: http://sizzlejs.com/
   6  */
   7 (function(){
   8
   9 var chunker = /((?:\((?:\([^()]+\)|[^()]+)+\)|\[(?:\[[^[\]]*\]|[^[\]]+)+\]|\\.|[^ >+~,(\[]+)+|[>+~])(\s*,\s*)?/g,
  10         done = 0,
  11         toString = Object.prototype.toString;
  12
  13 var Sizzle = function(selector, context, results, seed) {
  14         results = results || [];
  15         context = context || document;
  16
  17         if ( context.nodeType !== 1 && context.nodeType !== 9 )
  18                 return [];
  19
  20         if ( !selector || typeof selector !== "string" ) {
  21                 return results;
  22         }
  23
  24         var parts = [], m, set, checkSet, check, mode, extra, prune = true;
  25
  26         // Reset the position of the chunker regexp (start from head)
  27         chunker.lastIndex = 0;
  28
  29         while ( (m = chunker.exec(selector)) !== null ) {
  30                 parts.push( m[1] );
  31
  32                 if ( m[2] ) {
  33                         extra = RegExp.rightContext;
  34                         break;
  35                 }
  36         }
  37
  38         if ( parts.length > 1 && origPOS.exec( selector ) ) {
  39                 if ( parts.length === 2 && Expr.relative[ parts[0] ] ) {
  40                         set = posProcess( parts[0] + parts[1], context );
  41                 } else {
  42                         set = Expr.relative[ parts[0] ] ?
  43                                 [ context ] :
  44                                 Sizzle( parts.shift(), context );
  45
  46                         while ( parts.length ) {
  47                                 selector = parts.shift();
  48
  49                                 if ( Expr.relative[ selector ] )
  50                                         selector += parts.shift();
  51
  52                                 set = posProcess( selector, set );
  53                         }
  54                 }
  55         } else {
  56                 var ret = seed ?
  57                         { expr: parts.pop(), set: makeArray(seed) } :
  58                         Sizzle.find( parts.pop(), parts.length === 1 && context.parentNode ? context.parentNode : context );
  59                 set = Sizzle.filter( ret.expr, ret.set );
  60
  61                 if ( parts.length > 0 ) {
  62                         checkSet = makeArray(set);
  63                 } else {
  64                         prune = false;
  65                 }
  66
  67                 while ( parts.length ) {
  68                         var cur = parts.pop(), pop = cur;
  69
  70                         if ( !Expr.relative[ cur ] ) {
  71                                 cur = "";
  72                         } else {
  73                                 pop = parts.pop();
  74                         }
  75
  76                         if ( pop == null ) {
  77                                 pop = context;
  78                         }
  79
  80                         Expr.relative[ cur ]( checkSet, pop, isXML(context) );
  81                 }
  82         }
  83
  84         if ( !checkSet ) {
  85                 checkSet = set;
  86         }
  87
  88         if ( !checkSet ) {
  89                 throw "Syntax error, unrecognized expression: " + (cur || selector);
  90         }
  91
  92         if ( toString.call(checkSet) === "[object Array]" ) {
  93                 if ( !prune ) {
  94                         results.push.apply( results, checkSet );
  95                 } else if ( context.nodeType === 1 ) {
  96                         for ( var i = 0; checkSet[i] != null; i++ ) {
  97                                 if ( checkSet[i] && (checkSet[i] === true || checkSet[i].nodeType === 1 && contains(context, checkSet[i])) ) {
  98                                         results.push( set[i] );
  99                                 }
 100                         }
 101                 } else {
 102                         for ( var i = 0; checkSet[i] != null; i++ ) {
 103                                 if ( checkSet[i] && checkSet[i].nodeType === 1 ) {
 104                                         results.push( set[i] );
 105                                 }
 106                         }
 107                 }
 108         } else {
 109                 makeArray( checkSet, results );
 110         }
 111
 112         if ( extra ) {
 113                 Sizzle( extra, context, results, seed );
 114         }
 115
 116         return results;
 117 };
 118
 119 Sizzle.matches = function(expr, set){
 120         return Sizzle(expr, null, null, set);
 121 };
 122
 123 Sizzle.find = function(expr, context){
 124         var set, match;
 125
 126         if ( !expr ) {
 127                 return [];
 128         }
 129
 130         for ( var i = 0, l = Expr.order.length; i < l; i++ ) {
 131                 var type = Expr.order[i], match;
 132
 133                 if ( (match = Expr.match[ type ].exec( expr )) ) {
 134                         var left = RegExp.leftContext;
 135
 136                         if ( left.substr( left.length - 1 ) !== "\\" ) {
 137                                 match[1] = (match[1] || "").replace(/\\/g, "");
 138                                 set = Expr.find[ type ]( match, context );
 139                                 if ( set != null ) {
 140                                         expr = expr.replace( Expr.match[ type ], "" );
 141                                         break;
 142                                 }
 143                         }
 144                 }
 145         }
 146
 147         if ( !set ) {
 148                 set = context.getElementsByTagName("*");
 149         }
 150
 151         return {set: set, expr: expr};
 152 };
 153
 154 Sizzle.filter = function(expr, set, inplace, not){
 155         var old = expr, result = [], curLoop = set, match, anyFound;
 156
 157         while ( expr && set.length ) {
 158                 for ( var type in Expr.filter ) {
 159                         if ( (match = Expr.match[ type ].exec( expr )) != null ) {
 160                                 var filter = Expr.filter[ type ], found, item;
 161                                 anyFound = false;
 162
 163                                 if ( curLoop == result ) {
 164                                         result = [];
 165                                 }
 166
 167                                 if ( Expr.preFilter[ type ] ) {
 168                                         match = Expr.preFilter[ type ]( match, curLoop, inplace, result, not );
 169
 170                                         if ( !match ) {
 171                                                 anyFound = found = true;
 172                                         } else if ( match === true ) {
 173                                                 continue;
 174                                         }
 175                                 }
 176
 177                                 if ( match ) {
 178                                         for ( var i = 0; (item = curLoop[i]) != null; i++ ) {
 179                                                 if ( item ) {
 180                                                         found = filter( item, match, i, curLoop );
 181                                                         var pass = not ^ !!found;
 182
 183                                                         if ( inplace && found != null ) {
 184                                                                 if ( pass ) {
 185                                                                         anyFound = true;
 186                                                                 } else {
 187                                                                         curLoop[i] = false;
 188                                                                 }
 189                                                         } else if ( pass ) {
 190                                                                 result.push( item );
 191                                                                 anyFound = true;
 192                                                         }
 193                                                 }
 194                                         }
 195                                 }
 196
 197                                 if ( found !== undefined ) {
 198                                         if ( !inplace ) {
 199                                                 curLoop = result;
 200                                         }
 201
 202                                         expr = expr.replace( Expr.match[ type ], "" );
 203
 204                                         if ( !anyFound ) {
 205                                                 return [];
 206                                         }
 207
 208                                         break;
 209                                 }
 210                         }
 211                 }
 212
 213                 expr = expr.replace(/\s*,\s*/, "");
 214
 215                 // Improper expression
 216                 if ( expr == old ) {
 217                         if ( anyFound == null ) {
 218                                 throw "Syntax error, unrecognized expression: " + expr;
 219                         } else {
 220                                 break;
 221                         }
 222                 }
 223
 224                 old = expr;
 225         }
 226
 227         return curLoop;
 228 };
 229
 230 var Expr = Sizzle.selectors = {
 231         order: [ "ID", "NAME", "TAG" ],
 232         match: {
 233                 ID: /#((?:[\w\u00c0-\uFFFF_-]|\\.)+)/,
 234                 CLASS: /\.((?:[\w\u00c0-\uFFFF_-]|\\.)+)/,
 235                 NAME: /\[name=['"]*((?:[\w\u00c0-\uFFFF_-]|\\.)+)['"]*\]/,
 236                 ATTR: /\[\s*((?:[\w\u00c0-\uFFFF_-]|\\.)+)\s*(?:(\S?=)\s*(['"]*)(.*?)\3|)\s*\]/,
 237                 TAG: /^((?:[\w\u00c0-\uFFFF\*_-]|\\.)+)/,
 238                 CHILD: /:(only|nth|last|first)-child(?:\((even|odd|[\dn+-]*)\))?/,
 239                 POS: /:(nth|eq|gt|lt|first|last|even|odd)(?:\((\d*)\))?(?=[^-]|$)/,
 240                 PSEUDO: /:((?:[\w\u00c0-\uFFFF_-]|\\.)+)(?:\((['"]*)((?:\([^\)]+\)|[^\2\(\)]*)+)\2\))?/
 241         },
 242         attrMap: {
 243                 "class": "className",
 244                 "for": "htmlFor"
 245         },
 246         attrHandle: {
 247                 href: function(elem){
 248                         return elem.getAttribute("href");
 249                 }
 250         },
 251         relative: {
 252                 "+": function(checkSet, part){
 253                         for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 254                                 var elem = checkSet[i];
 255                                 if ( elem ) {
 256                                         var cur = elem.previousSibling;
 257                                         while ( cur && cur.nodeType !== 1 ) {
 258                                                 cur = cur.previousSibling;
 259                                         }
 260                                         checkSet[i] = typeof part === "string" ?
 261                                                 cur || false :
 262                                                 cur === part;
 263                                 }
 264                         }
 265
 266                         if ( typeof part === "string" ) {
 267                                 Sizzle.filter( part, checkSet, true );
 268                         }
 269                 },
 270                 ">": function(checkSet, part, isXML){
 271                         if ( typeof part === "string" && !/\W/.test(part) ) {
 272                                 part = isXML ? part : part.toUpperCase();
 273
 274                                 for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 275                                         var elem = checkSet[i];
 276                                         if ( elem ) {
 277                                                 var parent = elem.parentNode;
 278                                                 checkSet[i] = parent.nodeName === part ? parent : false;
 279                                         }
 280                                 }
 281                         } else {
 282                                 for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 283                                         var elem = checkSet[i];
 284                                         if ( elem ) {
 285                                                 checkSet[i] = typeof part === "string" ?
 286                                                         elem.parentNode :
 287                                                         elem.parentNode === part;
 288                                         }
 289                                 }
 290
 291                                 if ( typeof part === "string" ) {
 292                                         Sizzle.filter( part, checkSet, true );
 293                                 }
 294                         }
 295                 },
 296                 "": function(checkSet, part, isXML){
 297                         var doneName = "done" + (done++), checkFn = dirCheck;
 298
 299                         if ( !part.match(/\W/) ) {
 300                                 var nodeCheck = part = isXML ? part : part.toUpperCase();
 301                                 checkFn = dirNodeCheck;
 302                         }
 303
 304                         checkFn("parentNode", part, doneName, checkSet, nodeCheck, isXML);
 305                 },
 306                 "~": function(checkSet, part, isXML){
 307                         var doneName = "done" + (done++), checkFn = dirCheck;
 308
 309                         if ( typeof part === "string" && !part.match(/\W/) ) {
 310                                 var nodeCheck = part = isXML ? part : part.toUpperCase();
 311                                 checkFn = dirNodeCheck;
 312                         }
 313
 314                         checkFn("previousSibling", part, doneName, checkSet, nodeCheck, isXML);
 315                 }
 316         },
 317         find: {
 318                 ID: function(match, context){
 319                         if ( context.getElementById ) {
 320                                 var m = context.getElementById(match[1]);
 321                                 return m ? [m] : [];
 322                         }
 323                 },
 324                 NAME: function(match, context){
 325                         return context.getElementsByName ? context.getElementsByName(match[1]) : null;
 326                 },
 327                 TAG: function(match, context){
 328                         return context.getElementsByTagName(match[1]);
 329                 }
 330         },
 331         preFilter: {
 332                 CLASS: function(match, curLoop, inplace, result, not){
 333                         match = " " + match[1].replace(/\\/g, "") + " ";
 334
 335                         for ( var i = 0; curLoop[i] != null; i++ ) {
 336                                 if ( curLoop[i] ) {
 337                                         if ( not ^ (" " + curLoop[i].className + " ").indexOf(match) >= 0 ) {
 338                                                 if ( !inplace )
 339                                                         result.push( curLoop[i] );
 340                                         } else if ( inplace ) {
 341                                                 curLoop[i] = false;
 342                                         }
 343                                 }
 344                         }
 345
 346                         return false;
 347                 },
 348                 ID: function(match){
 349                         return match[1].replace(/\\/g, "");
 350                 },
 351                 TAG: function(match, curLoop){
 352                         for ( var i = 0; curLoop[i] === false; i++ ){}
 353                         return curLoop[i] && isXML(curLoop[i]) ? match[1] : match[1].toUpperCase();
 354                 },
 355                 CHILD: function(match){
 356                         if ( match[1] == "nth" ) {
 357                                 // parse equations like 'even', 'odd', '5', '2n', '3n+2', '4n-1', '-n+6'
 358                                 var test = /(-?)(\d*)n((?:\+|-)?\d*)/.exec(
 359                                         match[2] == "even" && "2n" || match[2] == "odd" && "2n+1" ||
 360                                         !/\D/.test( match[2] ) && "0n+" + match[2] || match[2]);
 361
 362                                 // calculate the numbers (first)n+(last) including if they are negative
 363                                 match[2] = (test[1] + (test[2] || 1)) - 0;
 364                                 match[3] = test[3] - 0;
 365                         }
 366
 367                         // TODO: Move to normal caching system
 368                         match[0] = "done" + (done++);
 369
 370                         return match;
 371                 },
 372                 ATTR: function(match){
 373                         var name = match[1].replace(/\\/g, "");
 374
 375                         if ( Expr.attrMap[name] ) {
 376                                 match[1] = Expr.attrMap[name];
 377                         }
 378
 379                         if ( match[2] === "~=" ) {
 380                                 match[4] = " " + match[4] + " ";
 381                         }
 382
 383                         return match;
 384                 },
 385                 PSEUDO: function(match, curLoop, inplace, result, not){
 386                         if ( match[1] === "not" ) {
 387                                 // If we're dealing with a complex expression, or a simple one
 388                                 if ( match[3].match(chunker).length > 1 ) {
 389                                         match[3] = Sizzle(match[3], null, null, curLoop);
 390                                 } else {
 391                                         var ret = Sizzle.filter(match[3], curLoop, inplace, true ^ not);
 392                                         if ( !inplace ) {
 393                                                 result.push.apply( result, ret );
 394                                         }
 395                                         return false;
 396                                 }
 397                         } else if ( Expr.match.POS.test( match[0] ) ) {
 398                                 return true;
 399                         }
 400
 401                         return match;
 402                 },
 403                 POS: function(match){
 404                         match.unshift( true );
 405                         return match;
 406                 }
 407         },
 408         filters: {
 409                 enabled: function(elem){
 410                         return elem.disabled === false && elem.type !== "hidden";
 411                 },
 412                 disabled: function(elem){
 413                         return elem.disabled === true;
 414                 },
 415                 checked: function(elem){
 416                         return elem.checked === true;
 417                 },
 418                 selected: function(elem){
 419                         // Accessing this property makes selected-by-default
 420                         // options in Safari work properly
 421                         elem.parentNode.selectedIndex;
 422                         return elem.selected === true;
 423                 },
 424                 parent: function(elem){
 425                         return !!elem.firstChild;
 426                 },
 427                 empty: function(elem){
 428                         return !elem.firstChild;
 429                 },
 430                 has: function(elem, i, match){
 431                         return !!Sizzle( match[3], elem ).length;
 432                 },
 433                 header: function(elem){
 434                         return /h\d/i.test( elem.nodeName );
 435                 },
 436                 text: function(elem){
 437                         return "text" === elem.type;
 438                 },
 439                 radio: function(elem){
 440                         return "radio" === elem.type;
 441                 },
 442                 checkbox: function(elem){
 443                         return "checkbox" === elem.type;
 444                 },
 445                 file: function(elem){
 446                         return "file" === elem.type;
 447                 },
 448                 password: function(elem){
 449                         return "password" === elem.type;
 450                 },
 451                 submit: function(elem){
 452                         return "submit" === elem.type;
 453                 },
 454                 image: function(elem){
 455                         return "image" === elem.type;
 456                 },
 457                 reset: function(elem){
 458                         return "reset" === elem.type;
 459                 },
 460                 button: function(elem){
 461                         return "button" === elem.type || elem.nodeName.toUpperCase() === "BUTTON";
 462                 },
 463                 input: function(elem){
 464                         return /input|select|textarea|button/i.test(elem.nodeName);
 465                 }
 466         },
 467         setFilters: {
 468                 first: function(elem, i){
 469                         return i === 0;
 470                 },
 471                 last: function(elem, i, match, array){
 472                         return i === array.length - 1;
 473                 },
 474                 even: function(elem, i){
 475                         return i % 2 === 0;
 476                 },
 477                 odd: function(elem, i){
 478                         return i % 2 === 1;
 479                 },
 480                 lt: function(elem, i, match){
 481                         return i < match[3] - 0;
 482                 },
 483                 gt: function(elem, i, match){
 484                         return i > match[3] - 0;
 485                 },
 486                 nth: function(elem, i, match){
 487                         return match[3] - 0 == i;
 488                 },
 489                 eq: function(elem, i, match){
 490                         return match[3] - 0 == i;
 491                 }
 492         },
 493         filter: {
 494                 CHILD: function(elem, match){
 495                         var type = match[1], parent = elem.parentNode;
 496
 497                         var doneName = "child" + parent.childNodes.length;
 498
 499                         if ( parent && (!parent[ doneName ] || !elem.nodeIndex) ) {
 500                                 var count = 1;
 501
 502                                 for ( var node = parent.firstChild; node; node = node.nextSibling ) {
 503                                         if ( node.nodeType == 1 ) {
 504                                                 node.nodeIndex = count++;
 505                                         }
 506                                 }
 507
 508                                 parent[ doneName ] = count - 1;
 509                         }
 510
 511                         if ( type == "first" ) {
 512                                 return elem.nodeIndex == 1;
 513                         } else if ( type == "last" ) {
 514                                 return elem.nodeIndex == parent[ doneName ];
 515                         } else if ( type == "only" ) {
 516                                 return parent[ doneName ] == 1;
 517                         } else if ( type == "nth" ) {
 518                                 var add = false, first = match[2], last = match[3];
 519
 520                                 if ( first == 1 && last == 0 ) {
 521                                         return true;
 522                                 }
 523
 524                                 if ( first == 0 ) {
 525                                         if ( elem.nodeIndex == last ) {
 526                                                 add = true;
 527                                         }
 528                                 } else if ( (elem.nodeIndex - last) % first == 0 && (elem.nodeIndex - last) / first >= 0 ) {
 529                                         add = true;
 530                                 }
 531
 532                                 return add;
 533                         }
 534                 },
 535                 PSEUDO: function(elem, match, i, array){
 536                         var name = match[1], filter = Expr.filters[ name ];
 537
 538                         if ( filter ) {
 539                                 return filter( elem, i, match, array );
 540                         } else if ( name === "contains" ) {
 541                                 return (elem.textContent || elem.innerText || "").indexOf(match[3]) >= 0;
 542                         } else if ( name === "not" ) {
 543                                 var not = match[3];
 544
 545                                 for ( var i = 0, l = not.length; i < l; i++ ) {
 546                                         if ( not[i] === elem ) {
 547                                                 return false;
 548                                         }
 549                                 }
 550
 551                                 return true;
 552                         }
 553                 },
 554                 ID: function(elem, match){
 555                         return elem.nodeType === 1 && elem.getAttribute("id") === match;
 556                 },
 557                 TAG: function(elem, match){
 558                         return (match === "*" && elem.nodeType === 1) || elem.nodeName === match;
 559                 },
 560                 CLASS: function(elem, match){
 561                         return match.test( elem.className );
 562                 },
 563                 ATTR: function(elem, match){
 564                         var result = Expr.attrHandle[ match[1] ] ? Expr.attrHandle[ match[1] ]( elem ) : elem[ match[1] ] || elem.getAttribute( match[1] ), value = result + "", type = match[2], check = match[4];
 565                         return result == null ?
 566                                 false :
 567                                 type === "=" ?
 568                                 value === check :
 569                                 type === "*=" ?
 570                                 value.indexOf(check) >= 0 :
 571                                 type === "~=" ?
 572                                 (" " + value + " ").indexOf(check) >= 0 :
 573                                 !match[4] ?
 574                                 result :
 575                                 type === "!=" ?
 576                                 value != check :
 577                                 type === "^=" ?
 578                                 value.indexOf(check) === 0 :
 579                                 type === "$=" ?
 580                                 value.substr(value.length - check.length) === check :
 581                                 type === "|=" ?
 582                                 value === check || value.substr(0, check.length + 1) === check + "-" :
 583                                 false;
 584                 },
 585                 POS: function(elem, match, i, array){
 586                         var name = match[2], filter = Expr.setFilters[ name ];
 587
 588                         if ( filter ) {
 589                                 return filter( elem, i, match, array );
 590                         }
 591                 }
 592         }
 593 };
 594
 595 var origPOS = Expr.match.POS;
 596
 597 for ( var type in Expr.match ) {
 598         Expr.match[ type ] = RegExp( Expr.match[ type ].source + /(?![^\[]*\])(?![^\(]*\))/.source );
 599 }
 600
 601 var makeArray = function(array, results) {
 602         array = Array.prototype.slice.call( array );
 603
 604         if ( results ) {
 605                 results.push.apply( results, array );
 606                 return results;
 607         }
 608
 609         return array;
 610 };
 611
 612 // Perform a simple check to determine if the browser is capable of
 613 // converting a NodeList to an array using builtin methods.
 614 try {
 615         Array.prototype.slice.call( document.documentElement.childNodes );
 616
 617 // Provide a fallback method if it does not work
 618 } catch(e){
 619         makeArray = function(array, results) {
 620                 var ret = results || [];
 621
 622                 if ( toString.call(array) === "[object Array]" ) {
 623                         Array.prototype.push.apply( ret, array );
 624                 } else {
 625                         if ( typeof array.length === "number" ) {
 626                                 for ( var i = 0, l = array.length; i < l; i++ ) {
 627                                         ret.push( array[i] );
 628                                 }
 629                         } else {
 630                                 for ( var i = 0; array[i]; i++ ) {
 631                                         ret.push( array[i] );
 632                                 }
 633                         }
 634                 }
 635
 636                 return ret;
 637         };
 638 }
 639
 640 // Check to see if the browser returns elements by name when
 641 // querying by getElementById (and provide a workaround)
 642 (function(){
 643         // We're going to inject a fake input element with a specified name
 644         var form = document.createElement("form"),
 645                 id = "script" + (new Date).getTime();
 646         form.innerHTML = "<input name='" + id + "'/>";
 647
 648         // Inject it into the root element, check its status, and remove it quickly
 649         var root = document.documentElement;
 650         root.insertBefore( form, root.firstChild );
 651
 652         // The workaround has to do additional checks after a getElementById
 653         // Which slows things down for other browsers (hence the branching)
 654         if ( !!document.getElementById( id ) ) {
 655                 Expr.find.ID = function(match, context){
 656                         if ( context.getElementById ) {
 657                                 var m = context.getElementById(match[1]);
 658                                 return m ? m.id === match[1] || m.getAttributeNode && m.getAttributeNode("id").nodeValue === match[1] ? [m] : undefined : [];
 659                         }
 660                 };
 661
 662                 Expr.filter.ID = function(elem, match){
 663                         var node = elem.getAttributeNode && elem.getAttributeNode("id");
 664                         return elem.nodeType === 1 && node && node.nodeValue === match;
 665                 };
 666         }
 667
 668         root.removeChild( form );
 669 })();
 670
 671 (function(){
 672         // Check to see if the browser returns only elements
 673         // when doing getElementsByTagName("*")
 674
 675         // Create a fake element
 676         var div = document.createElement("div");
 677         div.appendChild( document.createComment("") );
 678
 679         // Make sure no comments are found
 680         if ( div.getElementsByTagName("*").length > 0 ) {
 681                 Expr.find.TAG = function(match, context){
 682                         var results = context.getElementsByTagName(match[1]);
 683
 684                         // Filter out possible comments
 685                         if ( match[1] === "*" ) {
 686                                 var tmp = [];
 687
 688                                 for ( var i = 0; results[i]; i++ ) {
 689                                         if ( results[i].nodeType === 1 ) {
 690                                                 tmp.push( results[i] );
 691                                         }
 692                                 }
 693
 694                                 results = tmp;
 695                         }
 696
 697                         return results;
 698                 };
 699         }
 700
 701         // Check to see if an attribute returns normalized href attributes
 702         div.innerHTML = "<a href='#'></a>";
 703         if ( div.firstChild.getAttribute("href") !== "#" ) {
 704                 Expr.attrHandle.href = function(elem){
 705                         return elem.getAttribute("href", 2);
 706                 };
 707         }
 708 })();
 709
 710 if ( document.querySelectorAll ) (function(){
 711         var oldSizzle = Sizzle;
 712
 713         Sizzle = function(query, context, extra, seed){
 714                 context = context || document;
 715
 716                 if ( !seed && context.nodeType === 9 ) {
 717                         try {
 718                                 return makeArray( context.querySelectorAll(query), extra );
 719                         } catch(e){}
 720                 }
 721
 722                 return oldSizzle(query, context, extra, seed);
 723         };
 724
 725         Sizzle.find = oldSizzle.find;
 726         Sizzle.filter = oldSizzle.filter;
 727         Sizzle.selectors = oldSizzle.selectors;
 728         Sizzle.matches = oldSizzle.matches;
 729 })();
 730
 731 if ( document.getElementsByClassName && document.documentElement.getElementsByClassName ) {
 732         Expr.order.splice(1, 0, "CLASS");
 733         Expr.find.CLASS = function(match, context) {
 734                 return context.getElementsByClassName(match[1]);
 735         };
 736 }
 737
 738 function dirNodeCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
 739         for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 740                 var elem = checkSet[i];
 741                 if ( elem ) {
 742                         elem = elem[dir];
 743                         var match = false;
 744
 745                         while ( elem && elem.nodeType ) {
 746                                 var done = elem[doneName];
 747                                 if ( done ) {
 748                                         match = checkSet[ done ];
 749                                         break;
 750                                 }
 751
 752                                 if ( elem.nodeType === 1 && !isXML )
 753                                         elem[doneName] = i;
 754
 755                                 if ( elem.nodeName === cur ) {
 756                                         match = elem;
 757                                         break;
 758                                 }
 759
 760                                 elem = elem[dir];
 761                         }
 762
 763                         checkSet[i] = match;
 764                 }
 765         }
 766 }
 767
 768 function dirCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
 769         for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 770                 var elem = checkSet[i];
 771                 if ( elem ) {
 772                         elem = elem[dir];
 773                         var match = false;
 774
 775                         while ( elem && elem.nodeType ) {
 776                                 if ( elem[doneName] ) {
 777                                         match = checkSet[ elem[doneName] ];
 778                                         break;
 779                                 }
 780
 781                                 if ( elem.nodeType === 1 ) {
 782                                         if ( !isXML )
 783                                                 elem[doneName] = i;
 784
 785                                         if ( typeof cur !== "string" ) {
 786                                                 if ( elem === cur ) {
 787                                                         match = true;
 788                                                         break;
 789                                                 }
 790
 791                                         } else if ( Sizzle.filter( cur, [elem] ).length > 0 ) {
 792                                                 match = elem;
 793                                                 break;
 794                                         }
 795                                 }
 796
 797                                 elem = elem[dir];
 798                         }
 799
 800                         checkSet[i] = match;
 801                 }
 802         }
 803 }
 804
 805 var contains = document.compareDocumentPosition ?  function(a, b){
 806         return a.compareDocumentPosition(b) & 16;
 807 } : function(a, b){
 808         return a !== b && (a.contains ? a.contains(b) : true);
 809 };
 810
 811 var isXML = function(elem){
 812         return elem.documentElement && !elem.body ||
 813                 elem.tagName && elem.ownerDocument && !elem.ownerDocument.body;
 814 };
 815
 816 var posProcess = function(selector, context){
 817         var tmpSet = [], later = "", match,
 818                 root = context.nodeType ? [context] : context;
 819
 820         // Position selectors must be done after the filter
 821         // And so must :not(positional) so we move all PSEUDOs to the end
 822         while ( (match = Expr.match.PSEUDO.exec( selector )) ) {
 823                 later += match[0];
 824                 selector = selector.replace( Expr.match.PSEUDO, "" );
 825         }
 826
 827         selector = Expr.relative[selector] ? selector + "*" : selector;
 828
 829         for ( var i = 0, l = root.length; i < l; i++ ) {
 830                 Sizzle( selector, root[i], tmpSet );
 831         }
 832
 833         return Sizzle.filter( later, tmpSet );
 834 }
 835
 836 // EXPOSE
 837 jQuery.find = Sizzle;
 838 jQuery.filter = Sizzle.filter;
 839 jQuery.expr = Sizzle.selectors;
 840 jQuery.expr[":"] = jQuery.expr.filters;
 841
 842 Sizzle.selectors.filters.hidden = function(elem){
 843         return "hidden" === elem.type ||
 844                 jQuery.css(elem, "display") === "none" ||
 845                 jQuery.css(elem, "visibility") === "hidden";
 846 };
 847
 848 Sizzle.selectors.filters.visible = function(elem){
 849         return "hidden" !== elem.type &&
 850                 jQuery.css(elem, "display") !== "none" &&
 851                 jQuery.css(elem, "visibility") !== "hidden";
 852 };
 853
 854 Sizzle.selectors.filters.animated = function(elem){
 855         return jQuery.grep(jQuery.timers, function(fn){
 856                 return elem === fn.elem;
 857         }).length;
 858 };
 859
 860 jQuery.multiFilter = function( expr, elems, not ) {
 861         if ( not ) {
 862                 expr = ":not(" + expr + ")";
 863         }
 864
 865         return Sizzle.matches(expr, elems);
 866 };
 867
 868 jQuery.dir = function( elem, dir ){
 869         var matched = [], cur = elem[dir];
 870         while ( cur && cur != document ) {
 871                 if ( cur.nodeType == 1 )
 872                         matched.push( cur );
 873                 cur = cur[dir];
 874         }
 875         return matched;
 876 };
 877
 878 jQuery.nth = function(cur, result, dir, elem){
 879         result = result || 1;
 880         var num = 0;
 881
 882         for ( ; cur; cur = cur[dir] )
 883                 if ( cur.nodeType == 1 && ++num == result )
 884                         break;
 885
 886         return cur;
 887 };
 888
 889 jQuery.sibling = function(n, elem){
 890         var r = [];
 891
 892         for ( ; n; n = n.nextSibling ) {
 893                 if ( n.nodeType == 1 && n != elem )
 894                         r.push( n );
 895         }
 896
 897         return r;
 898 };
 899
 900 return;
 901
 902 window.Sizzle = Sizzle;
 903
 904 })();