src/selector.js

   1 /*
   2  * Sizzle CSS Selector Engine - v0.9
   3  *  Copyright 2009, John Resig (http://ejohn.org/)
   4  *  released under the MIT License
   5  */
   6 (function(){
   7
   8 var chunker = /((?:\((?:\([^()]+\)|[^()]+)+\)|\[(?:\[[^[\]]*\]|[^[\]]+)+\]|\\.|[^ >+~,(\[]+)+|[>+~])(\s*,\s*)?/g;
   9
  10 var done = 0;
  11
  12 var Sizzle = function(selector, context, results, seed) {
  13         var doCache = !results;
  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 && Expr.match.POS.exec( selector ) ) {
  39                 if ( parts.length === 2 && Expr.relative[ parts[0] ] ) {
  40                         var later = "", match;
  41
  42                         // Position selectors must be done after the filter
  43                         while ( (match = Expr.match.POS.exec( selector )) ) {
  44                                 later += match[0];
  45                                 selector = selector.replace( Expr.match.POS, "" );
  46                         }
  47
  48                         set = Sizzle.filter( later, Sizzle( selector, context ) );
  49                 } else {
  50                         set = Expr.relative[ parts[0] ] ?
  51                                 [ context ] :
  52                                 Sizzle( parts.shift(), context );
  53
  54                         while ( parts.length ) {
  55                                 var tmpSet = [];
  56
  57                                 selector = parts.shift();
  58                                 if ( Expr.relative[ selector ] )
  59                                         selector += parts.shift();
  60
  61                                 for ( var i = 0, l = set.length; i < l; i++ ) {
  62                                         Sizzle( selector, set[i], tmpSet );
  63                                 }
  64
  65                                 set = tmpSet;
  66                         }
  67                 }
  68         } else {
  69                 var ret = seed ?
  70                         { expr: parts.pop(), set: makeArray(seed) } :
  71                         Sizzle.find( parts.pop(), parts.length === 1 && context.parentNode ? context.parentNode : context );
  72                 set = Sizzle.filter( ret.expr, ret.set );
  73
  74                 if ( parts.length > 0 ) {
  75                         checkSet = makeArray(set);
  76                 } else {
  77                         prune = false;
  78                 }
  79
  80                 while ( parts.length ) {
  81                         var cur = parts.pop(), pop = cur;
  82
  83                         if ( !Expr.relative[ cur ] ) {
  84                                 cur = "";
  85                         } else {
  86                                 pop = parts.pop();
  87                         }
  88
  89                         if ( pop == null ) {
  90                                 pop = context;
  91                         }
  92
  93                         Expr.relative[ cur ]( checkSet, pop );
  94                 }
  95         }
  96
  97         if ( !checkSet ) {
  98                 checkSet = set;
  99         }
 100
 101         if ( !checkSet ) {
 102                 throw "Syntax error, unrecognized expression: " + (cur || selector);
 103         }
 104
 105         if ( checkSet instanceof Array ) {
 106                 if ( !prune ) {
 107                         results.push.apply( results, checkSet );
 108                 } else if ( context.nodeType === 1 ) {
 109                         for ( var i = 0; checkSet[i] != null; i++ ) {
 110                                 if ( checkSet[i] && (checkSet[i] === true || checkSet[i].nodeType === 1 && contains(context, checkSet[i])) ) {
 111                                         results.push( set[i] );
 112                                 }
 113                         }
 114                 } else {
 115                         for ( var i = 0; checkSet[i] != null; i++ ) {
 116                                 if ( checkSet[i] && checkSet[i].nodeType === 1 ) {
 117                                         results.push( set[i] );
 118                                 }
 119                         }
 120                 }
 121         } else {
 122                 makeArray( checkSet, results );
 123         }
 124
 125         if ( extra ) {
 126                 Sizzle( extra, context, results, seed );
 127         }
 128
 129         return results;
 130 };
 131
 132 Sizzle.matches = function(expr, set){
 133         return Sizzle(expr, null, null, set);
 134 };
 135
 136 Sizzle.find = function(expr, context){
 137         var set, match;
 138
 139         if ( !expr ) {
 140                 return [];
 141         }
 142
 143         for ( var i = 0, l = Expr.order.length; i < l; i++ ) {
 144                 var type = Expr.order[i], match;
 145
 146                 if ( (match = Expr.match[ type ].exec( expr )) ) {
 147                         var left = RegExp.leftContext;
 148
 149                         if ( left.substr( left.length - 1 ) !== "\\" ) {
 150                                 match[1] = (match[1] || "").replace(/\\/g, "");
 151                                 set = Expr.find[ type ]( match, context );
 152                                 if ( set != null ) {
 153                                         expr = expr.replace( Expr.match[ type ], "" );
 154                                         break;
 155                                 }
 156                         }
 157                 }
 158         }
 159
 160         if ( !set ) {
 161                 set = context.getElementsByTagName("*");
 162         }
 163
 164         return {set: set, expr: expr};
 165 };
 166
 167 Sizzle.filter = function(expr, set, inplace, not){
 168         var old = expr, result = [], curLoop = set, match, anyFound;
 169
 170         while ( expr && set.length ) {
 171                 for ( var type in Expr.filter ) {
 172                         if ( (match = Expr.match[ type ].exec( expr )) != null ) {
 173                                 var filter = Expr.filter[ type ], goodArray = null, goodPos = 0, found, item;
 174                                 anyFound = false;
 175
 176                                 if ( curLoop == result ) {
 177                                         result = [];
 178                                 }
 179
 180                                 if ( Expr.preFilter[ type ] ) {
 181                                         match = Expr.preFilter[ type ]( match, curLoop, inplace, result, not );
 182
 183                                         if ( !match ) {
 184                                                 anyFound = found = true;
 185                                         } else if ( match[0] === true ) {
 186                                                 goodArray = [];
 187                                                 var last = null, elem;
 188                                                 for ( var i = 0; (elem = curLoop[i]) !== undefined; i++ ) {
 189                                                         if ( elem && last !== elem ) {
 190                                                                 goodArray.push( elem );
 191                                                                 last = elem;
 192                                                         }
 193                                                 }
 194                                         }
 195                                 }
 196
 197                                 if ( match ) {
 198                                         for ( var i = 0; (item = curLoop[i]) !== undefined; i++ ) {
 199                                                 if ( item ) {
 200                                                         if ( goodArray && item != goodArray[goodPos] ) {
 201                                                                 goodPos++;
 202                                                         }
 203
 204                                                         found = filter( item, match, goodPos, goodArray );
 205                                                         var pass = not ^ !!found;
 206
 207                                                         if ( inplace && found != null ) {
 208                                                                 if ( pass ) {
 209                                                                         anyFound = true;
 210                                                                 } else {
 211                                                                         curLoop[i] = false;
 212                                                                 }
 213                                                         } else if ( pass ) {
 214                                                                 result.push( item );
 215                                                                 anyFound = true;
 216                                                         }
 217                                                 }
 218                                         }
 219                                 }
 220
 221                                 if ( found !== undefined ) {
 222                                         if ( !inplace ) {
 223                                                 curLoop = result;
 224                                         }
 225
 226                                         expr = expr.replace( Expr.match[ type ], "" );
 227
 228                                         if ( !anyFound ) {
 229                                                 return [];
 230                                         }
 231
 232                                         break;
 233                                 }
 234                         }
 235                 }
 236
 237                 expr = expr.replace(/\s*,\s*/, "");
 238
 239                 // Improper expression
 240                 if ( expr == old ) {
 241                         if ( anyFound == null ) {
 242                                 throw "Syntax error, unrecognized expression: " + expr;
 243                         } else {
 244                                 break;
 245                         }
 246                 }
 247
 248                 old = expr;
 249         }
 250
 251         return curLoop;
 252 };
 253
 254 var Expr = Sizzle.selectors = {
 255         order: [ "ID", "NAME", "TAG" ],
 256         match: {
 257                 ID: /#((?:[\w\u0128-\uFFFF_-]|\\.)+)/,
 258                 CLASS: /\.((?:[\w\u0128-\uFFFF_-]|\\.)+)/,
 259                 NAME: /\[name=['"]*((?:[\w\u0128-\uFFFF_-]|\\.)+)['"]*\]/,
 260                 ATTR: /\[((?:[\w\u0128-\uFFFF_-]|\\.)+)\s*(?:(\S?=)\s*(['"]*)(.*?)\3|)\]/,
 261                 TAG: /^((?:[\w\u0128-\uFFFF\*_-]|\\.)+)/,
 262                 CHILD: /:(only|nth|last|first)-child\(?(even|odd|[\dn+-]*)\)?/,
 263                 POS: /:(nth|eq|gt|lt|first|last|even|odd)\(?(\d*)\)?(?:[^-]|$)/,
 264                 PSEUDO: /:((?:[\w\u0128-\uFFFF_-]|\\.)+)(?:\((['"]*)((?:\([^\)]+\)|[^\2\(\)]*)+)\2\))?/
 265         },
 266         attrMap: {
 267                 "class": "className"
 268         },
 269         relative: {
 270                 "+": function(checkSet, part){
 271                         for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 272                                 var elem = checkSet[i];
 273                                 if ( elem ) {
 274                                         var cur = elem.previousSibling;
 275                                         while ( cur && cur.nodeType !== 1 ) {
 276                                                 cur = cur.previousSibling;
 277                                         }
 278                                         checkSet[i] = typeof part === "string" ?
 279                                                 cur || false :
 280                                                 cur === part;
 281                                 }
 282                         }
 283
 284                         if ( typeof part === "string" ) {
 285                                 Sizzle.filter( part, checkSet, true );
 286                         }
 287                 },
 288                 ">": function(checkSet, part){
 289                         if ( typeof part === "string" && !/\W/.test(part) ) {
 290                                 part = part.toUpperCase();
 291
 292                                 for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 293                                         var elem = checkSet[i];
 294                                         if ( elem ) {
 295                                                 var parent = elem.parentNode;
 296                                                 checkSet[i] = parent.nodeName === part ? parent : false;
 297                                         }
 298                                 }
 299                         } else {
 300                                 for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 301                                         var elem = checkSet[i];
 302                                         if ( elem ) {
 303                                                 checkSet[i] = typeof part === "string" ?
 304                                                         elem.parentNode :
 305                                                         elem.parentNode === part;
 306                                         }
 307                                 }
 308
 309                                 if ( typeof part === "string" ) {
 310                                         Sizzle.filter( part, checkSet, true );
 311                                 }
 312                         }
 313                 },
 314                 "": function(checkSet, part){
 315                         var doneName = "done" + (done++), checkFn = dirCheck;
 316
 317                         if ( !part.match(/\W/) ) {
 318                                 var nodeCheck = part = part.toUpperCase();
 319                                 checkFn = dirNodeCheck;
 320                         }
 321
 322                         checkFn("parentNode", part, doneName, checkSet, nodeCheck);
 323                 },
 324                 "~": function(checkSet, part){
 325                         var doneName = "done" + (done++), checkFn = dirCheck;
 326
 327                         if ( typeof part === "string" && !part.match(/\W/) ) {
 328                                 var nodeCheck = part = part.toUpperCase();
 329                                 checkFn = dirNodeCheck;
 330                         }
 331
 332                         checkFn("previousSibling", part, doneName, checkSet, nodeCheck);
 333                 }
 334         },
 335         find: {
 336                 ID: function(match, context){
 337                         if ( context.getElementById ) {
 338                                 var m = context.getElementById(match[1]);
 339                                 return m ? [m] : [];
 340                         }
 341                 },
 342                 NAME: function(match, context){
 343                         return context.getElementsByName ? context.getElementsByName(match[1]) : null;
 344                 },
 345                 TAG: function(match, context){
 346                         return context.getElementsByTagName(match[1]);
 347                 }
 348         },
 349         preFilter: {
 350                 CLASS: function(match, curLoop, inplace, result, not){
 351                         match = " " + match[1].replace(/\\/g, "") + " ";
 352
 353                         for ( var i = 0; curLoop[i]; i++ ) {
 354                                 if ( not ^ (" " + curLoop[i].className + " ").indexOf(match) >= 0 ) {
 355                                         if ( !inplace )
 356                                                 result.push( curLoop[i] );
 357                                 } else if ( inplace ) {
 358                                         curLoop[i] = false;
 359                                 }
 360                         }
 361
 362                         return false;
 363                 },
 364                 ID: function(match){
 365                         return match[1];
 366                 },
 367                 TAG: function(match){
 368                         return match[1].toUpperCase();
 369                 },
 370                 CHILD: function(match){
 371                         if ( match[1] == "nth" ) {
 372                                 // parse equations like 'even', 'odd', '5', '2n', '3n+2', '4n-1', '-n+6'
 373                                 var test = /(-?)(\d*)n((?:\+|-)?\d*)/.exec(
 374                                         match[2] == "even" && "2n" || match[2] == "odd" && "2n+1" ||
 375                                         !/\D/.test( match[2] ) && "0n+" + match[2] || match[2]);
 376
 377                                 // calculate the numbers (first)n+(last) including if they are negative
 378                                 match[2] = (test[1] + (test[2] || 1)) - 0;
 379                                 match[3] = test[3] - 0;
 380                         }
 381
 382                         // TODO: Move to normal caching system
 383                         match[0] = "done" + (done++);
 384
 385                         return match;
 386                 },
 387                 ATTR: function(match){
 388                         var name = match[1];
 389
 390                         if ( Expr.attrMap[name] ) {
 391                                 match[1] = Expr.attrMap[name];
 392                         }
 393
 394                         if ( match[2] === "~=" ) {
 395                                 match[4] = " " + match[4] + " ";
 396                         }
 397
 398                         return match;
 399                 },
 400                 PSEUDO: function(match, curLoop, inplace, result, not){
 401                         if ( match[1] === "not" ) {
 402                                 // If we're dealing with a complex expression, or a simple one
 403                                 if ( match[3].match(chunker).length > 1 ) {
 404                                         match[3] = Sizzle(match[3], null, null, curLoop);
 405                                 } else {
 406                                         var ret = Sizzle.filter(match[3], curLoop, inplace, true ^ not);
 407                                         if ( !inplace ) {
 408                                                 result.push.apply( result, ret );
 409                                         }
 410                                         return false;
 411                                 }
 412                         }
 413
 414                         return match;
 415                 },
 416                 POS: function(match){
 417                         match.unshift( true );
 418                         return match;
 419                 }
 420         },
 421         filters: {
 422                 enabled: function(elem){
 423                         return elem.disabled === false && elem.type !== "hidden";
 424                 },
 425                 disabled: function(elem){
 426                         return elem.disabled === true;
 427                 },
 428                 checked: function(elem){
 429                         return elem.checked === true;
 430                 },
 431                 selected: function(elem){
 432                         // Accessing this property makes selected-by-default
 433                         // options in Safari work properly
 434                         elem.parentNode.selectedIndex;
 435                         return elem.selected === true;
 436                 },
 437                 parent: function(elem){
 438                         return !!elem.firstChild;
 439                 },
 440                 empty: function(elem){
 441                         return !elem.firstChild;
 442                 },
 443                 has: function(elem, i, match){
 444                         return !!Sizzle( match[3], elem ).length;
 445                 },
 446                 header: function(elem){
 447                         return /h\d/i.test( elem.nodeName );
 448                 },
 449                 text: function(elem){
 450                         return "text" === elem.type;
 451                 },
 452                 radio: function(elem){
 453                         return "radio" === elem.type;
 454                 },
 455                 checkbox: function(elem){
 456                         return "checkbox" === elem.type;
 457                 },
 458                 file: function(elem){
 459                         return "file" === elem.type;
 460                 },
 461                 password: function(elem){
 462                         return "password" === elem.type;
 463                 },
 464                 submit: function(elem){
 465                         return "submit" === elem.type;
 466                 },
 467                 image: function(elem){
 468                         return "image" === elem.type;
 469                 },
 470                 reset: function(elem){
 471                         return "reset" === elem.type;
 472                 },
 473                 button: function(elem){
 474                         return "button" === elem.type || elem.nodeName.toUpperCase() === "BUTTON";
 475                 },
 476                 input: function(elem){
 477                         return /input|select|textarea|button/i.test(elem.nodeName);
 478                 }
 479         },
 480         setFilters: {
 481                 first: function(elem, i){
 482                         return i === 0;
 483                 },
 484                 last: function(elem, i, match, array){
 485                         return i === array.length - 1;
 486                 },
 487                 even: function(elem, i){
 488                         return i % 2 === 0;
 489                 },
 490                 odd: function(elem, i){
 491                         return i % 2 === 1;
 492                 },
 493                 lt: function(elem, i, match){
 494                         return i < match[3] - 0;
 495                 },
 496                 gt: function(elem, i, match){
 497                         return i > match[3] - 0;
 498                 },
 499                 nth: function(elem, i, match){
 500                         return match[3] - 0 == i;
 501                 },
 502                 eq: function(elem, i, match){
 503                         return match[3] - 0 == i;
 504                 }
 505         },
 506         filter: {
 507                 CHILD: function(elem, match){
 508                         var type = match[1], parent = elem.parentNode;
 509
 510                         var doneName = match[0];
 511
 512                         if ( parent && !parent[ doneName ] ) {
 513                                 var count = 1;
 514
 515                                 for ( var node = parent.firstChild; node; node = node.nextSibling ) {
 516                                         if ( node.nodeType == 1 ) {
 517                                                 node.nodeIndex = count++;
 518                                         }
 519                                 }
 520
 521                                 parent[ doneName ] = count - 1;
 522                         }
 523
 524                         if ( type == "first" ) {
 525                                 return elem.nodeIndex == 1;
 526                         } else if ( type == "last" ) {
 527                                 return elem.nodeIndex == parent[ doneName ];
 528                         } else if ( type == "only" ) {
 529                                 return parent[ doneName ] == 1;
 530                         } else if ( type == "nth" ) {
 531                                 var add = false, first = match[2], last = match[3];
 532
 533                                 if ( first == 1 && last == 0 ) {
 534                                         return true;
 535                                 }
 536
 537                                 if ( first == 0 ) {
 538                                         if ( elem.nodeIndex == last ) {
 539                                                 add = true;
 540                                         }
 541                                 } else if ( (elem.nodeIndex - last) % first == 0 && (elem.nodeIndex - last) / first >= 0 ) {
 542                                         add = true;
 543                                 }
 544
 545                                 return add;
 546                         }
 547                 },
 548                 PSEUDO: function(elem, match, i, array){
 549                         var name = match[1], filter = Expr.filters[ name ];
 550
 551                         if ( filter ) {
 552                                 return filter( elem, i, match, array );
 553                         } else if ( name === "contains" ) {
 554                                 return (elem.textContent || elem.innerText || "").indexOf(match[3]) >= 0;
 555                         } else if ( name === "not" ) {
 556                                 var not = match[3];
 557
 558                                 for ( var i = 0, l = not.length; i < l; i++ ) {
 559                                         if ( not[i] === elem ) {
 560                                                 return false;
 561                                         }
 562                                 }
 563
 564                                 return true;
 565                         }
 566                 },
 567                 ID: function(elem, match){
 568                         return elem.nodeType === 1 && elem.getAttribute("id") === match;
 569                 },
 570                 TAG: function(elem, match){
 571                         return (match === "*" && elem.nodeType === 1) || elem.nodeName === match;
 572                 },
 573                 CLASS: function(elem, match){
 574                         return match.test( elem.className );
 575                 },
 576                 ATTR: function(elem, match){
 577                         var result = elem[ match[1] ] || elem.getAttribute( match[1] ), value = result + "", type = match[2], check = match[4];
 578                         return result == null ?
 579                                 false :
 580                                 type === "=" ?
 581                                 value === check :
 582                                 type === "*=" ?
 583                                 value.indexOf(check) >= 0 :
 584                                 type === "~=" ?
 585                                 (" " + value + " ").indexOf(check) >= 0 :
 586                                 !match[4] ?
 587                                 result :
 588                                 type === "!=" ?
 589                                 value != check :
 590                                 type === "^=" ?
 591                                 value.indexOf(check) === 0 :
 592                                 type === "$=" ?
 593                                 value.substr(value.length - check.length) === check :
 594                                 type === "|=" ?
 595                                 value === check || value.substr(0, check.length + 1) === check + "-" :
 596                                 false;
 597                 },
 598                 POS: function(elem, match, i, array){
 599                         var name = match[2], filter = Expr.setFilters[ name ];
 600
 601                         if ( filter ) {
 602                                 return filter( elem, i, match, array );
 603                         }
 604                 }
 605         }
 606 };
 607
 608 for ( var type in Expr.match ) {
 609         Expr.match[ type ] = RegExp( Expr.match[ type ].source + /(?![^\[]*\])(?![^\(]*\))/.source );
 610 }
 611
 612 var makeArray = function(array, results) {
 613         array = Array.prototype.slice.call( array );
 614
 615         if ( results ) {
 616                 results.push.apply( results, array );
 617                 return results;
 618         }
 619
 620         return array;
 621 };
 622
 623 // Perform a simple check to determine if the browser is capable of
 624 // converting a NodeList to an array using builtin methods.
 625 try {
 626         Array.prototype.slice.call( document.documentElement.childNodes );
 627
 628 // Provide a fallback method if it does not work
 629 } catch(e){
 630         makeArray = function(array, results) {
 631                 var ret = results || [];
 632
 633                 if ( array instanceof Array ) {
 634                         Array.prototype.push.apply( ret, array );
 635                 } else {
 636                         if ( typeof array.length === "number" ) {
 637                                 for ( var i = 0, l = array.length; i < l; i++ ) {
 638                                         ret.push( array[i] );
 639                                 }
 640                         } else {
 641                                 for ( var i = 0; array[i]; i++ ) {
 642                                         ret.push( array[i] );
 643                                 }
 644                         }
 645                 }
 646
 647                 return ret;
 648         };
 649 }
 650
 651 // Check to see if the browser returns elements by name when
 652 // querying by getElementById (and provide a workaround)
 653 (function(){
 654         // We're going to inject a fake input element with a specified name
 655         var form = document.createElement("form"),
 656                 id = "script" + (new Date).getTime();
 657         form.innerHTML = "<input name='" + id + "'/>";
 658
 659         // Inject it into the root element, check its status, and remove it quickly
 660         var root = document.documentElement;
 661         root.insertBefore( form, root.firstChild );
 662
 663         // The workaround has to do additional checks after a getElementById
 664         // Which slows things down for other browsers (hence the branching)
 665         if ( !!document.getElementById( id ) ) {
 666                 Expr.find.ID = function(match, context){
 667                         if ( context.getElementById ) {
 668                                 var m = context.getElementById(match[1]);
 669                                 return m ? m.id === match[1] || m.getAttributeNode && m.getAttributeNode("id").nodeValue === match[1] ? [m] : undefined : [];
 670                         }
 671                 };
 672
 673                 Expr.filter.ID = function(elem, match){
 674                         var node = elem.getAttributeNode && elem.getAttributeNode("id");
 675                         return elem.nodeType === 1 && node && node.nodeValue === match;
 676                 };
 677         }
 678
 679         root.removeChild( form );
 680 })();
 681
 682 // Check to see if the browser returns only elements
 683 // when doing getElementsByTagName("*")
 684 (function(){
 685         // Create a fake element
 686         var div = document.createElement("div");
 687         div.appendChild( document.createComment("") );
 688
 689         // Make sure no comments are found
 690         if ( div.getElementsByTagName("*").length > 0 ) {
 691                 Expr.find.TAG = function(match, context){
 692                         var results = context.getElementsByTagName(match[1]);
 693
 694                         // Filter out possible comments
 695                         if ( match[1] === "*" ) {
 696                                 var tmp = [];
 697
 698                                 for ( var i = 0; results[i]; i++ ) {
 699                                         if ( results[i].nodeType === 1 ) {
 700                                                 tmp.push( results[i] );
 701                                         }
 702                                 }
 703
 704                                 results = tmp;
 705                         }
 706
 707                         return results;
 708                 };
 709         }
 710 })();
 711
 712 if ( document.querySelectorAll ) (function(){
 713         var oldSizzle = Sizzle;
 714
 715         Sizzle = function(query, context, extra, seed){
 716                 context = context || document;
 717
 718                 if ( !seed && context.nodeType === 9 ) {
 719                         try {
 720                                 return makeArray( context.querySelectorAll(query) );
 721                         } catch(e){}
 722                 }
 723
 724                 return oldSizzle(query, context, extra, seed);
 725         };
 726
 727         Sizzle.find = oldSizzle.find;
 728         Sizzle.filter = oldSizzle.filter;
 729         Sizzle.selectors = oldSizzle.selectors;
 730         Sizzle.matches = oldSizzle.matches;
 731 })();
 732
 733 if ( document.documentElement.getElementsByClassName ) {
 734         Expr.order.splice(1, 0, "CLASS");
 735         Expr.find.CLASS = function(match, context) {
 736                 return context.getElementsByClassName(match[1]);
 737         };
 738 }
 739
 740 function dirNodeCheck( dir, cur, doneName, checkSet, nodeCheck ) {
 741         for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 742                 var elem = checkSet[i];
 743                 if ( elem ) {
 744                         elem = elem[dir];
 745                         var match = false;
 746
 747                         while ( elem && elem.nodeType ) {
 748                                 var done = elem[doneName];
 749                                 if ( done ) {
 750                                         match = checkSet[ done ];
 751                                         break;
 752                                 }
 753
 754                                 if ( elem.nodeType === 1 )
 755                                         elem[doneName] = i;
 756
 757                                 if ( elem.nodeName === cur ) {
 758                                         match = elem;
 759                                         break;
 760                                 }
 761
 762                                 elem = elem[dir];
 763                         }
 764
 765                         checkSet[i] = match;
 766                 }
 767         }
 768 }
 769
 770 function dirCheck( dir, cur, doneName, checkSet, nodeCheck ) {
 771         for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 772                 var elem = checkSet[i];
 773                 if ( elem ) {
 774                         elem = elem[dir];
 775                         var match = false;
 776
 777                         while ( elem && elem.nodeType ) {
 778                                 if ( elem[doneName] ) {
 779                                         match = checkSet[ elem[doneName] ];
 780                                         break;
 781                                 }
 782
 783                                 if ( elem.nodeType === 1 ) {
 784                                         elem[doneName] = i;
 785
 786                                         if ( typeof cur !== "string" ) {
 787                                                 if ( elem === cur ) {
 788                                                         match = true;
 789                                                         break;
 790                                                 }
 791
 792                                         } else if ( Sizzle.filter( cur, [elem] ).length > 0 ) {
 793                                                 match = elem;
 794                                                 break;
 795                                         }
 796                                 }
 797
 798                                 elem = elem[dir];
 799                         }
 800
 801                         checkSet[i] = match;
 802                 }
 803         }
 804 }
 805
 806 var contains = document.compareDocumentPosition ?  function(a, b){
 807         return a.compareDocumentPosition(b) & 16;
 808 } : function(a, b){
 809         return a !== b && (a.contains ? a.contains(b) : true);
 810 };
 811
 812 // EXPOSE
 813 jQuery.find = Sizzle;
 814 jQuery.filter = Sizzle.filter;
 815 jQuery.expr = Sizzle.selectors;
 816 jQuery.expr[":"] = jQuery.expr.filters;
 817
 818 Sizzle.selectors.filters.hidden = function(elem){
 819         return "hidden" === elem.type ||
 820                 jQuery.css(elem, "display") === "none" ||
 821                 jQuery.css(elem, "visibility") === "hidden";
 822 };
 823
 824 Sizzle.selectors.filters.visible = function(elem){
 825         return "hidden" !== elem.type &&
 826                 jQuery.css(elem, "display") !== "none" &&
 827                 jQuery.css(elem, "visibility") !== "hidden";
 828 };
 829
 830 Sizzle.selectors.filters.animated = function(elem){
 831         return jQuery.grep(jQuery.timers, function(fn){
 832                 return elem === fn.elem;
 833         }).length;
 834 };
 835
 836 jQuery.multiFilter = function( expr, elems, not ) {
 837         if ( not ) {
 838                 expr = ":not(" + expr + ")";
 839         }
 840
 841         return Sizzle.matches(expr, elems);
 842 };
 843
 844 jQuery.dir = function( elem, dir ){
 845         var matched = [], cur = elem[dir];
 846         while ( cur && cur != document ) {
 847                 if ( cur.nodeType == 1 )
 848                         matched.push( cur );
 849                 cur = cur[dir];
 850         }
 851         return matched;
 852 };
 853
 854 jQuery.nth = function(cur, result, dir, elem){
 855         result = result || 1;
 856         var num = 0;
 857
 858         for ( ; cur; cur = cur[dir] )
 859                 if ( cur.nodeType == 1 && ++num == result )
 860                         break;
 861
 862         return cur;
 863 };
 864
 865 jQuery.sibling = function(n, elem){
 866         var r = [];
 867
 868         for ( ; n; n = n.nextSibling ) {
 869                 if ( n.nodeType == 1 && n != elem )
 870                         r.push( n );
 871         }
 872
 873         return r;
 874 };
 875
 876 return;
 877
 878 window.Sizzle = Sizzle;
 879
 880 })();