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 && 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( /\s$/.test(selector) ? selector + "*" : 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, isXML(context) );
  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 ( toString.call(checkSet) === "[object 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 === true ) {
 186                                                 continue;
 187                                         } else if ( match[0] === true ) {
 188                                                 goodArray = [];
 189                                                 var last = null, elem;
 190                                                 for ( var i = 0; (elem = curLoop[i]) !== undefined; i++ ) {
 191                                                         if ( elem && last !== elem ) {
 192                                                                 goodArray.push( elem );
 193                                                                 last = elem;
 194                                                         }
 195                                                 }
 196                                         }
 197                                 }
 198
 199                                 if ( match ) {
 200                                         for ( var i = 0; (item = curLoop[i]) !== undefined; i++ ) {
 201                                                 if ( item ) {
 202                                                         if ( goodArray && item != goodArray[goodPos] ) {
 203                                                                 goodPos++;
 204                                                         }
 205
 206                                                         found = filter( item, match, goodPos, goodArray );
 207                                                         var pass = not ^ !!found;
 208
 209                                                         if ( inplace && found != null ) {
 210                                                                 if ( pass ) {
 211                                                                         anyFound = true;
 212                                                                 } else {
 213                                                                         curLoop[i] = false;
 214                                                                 }
 215                                                         } else if ( pass ) {
 216                                                                 result.push( item );
 217                                                                 anyFound = true;
 218                                                         }
 219                                                 }
 220                                         }
 221                                 }
 222
 223                                 if ( found !== undefined ) {
 224                                         if ( !inplace ) {
 225                                                 curLoop = result;
 226                                         }
 227
 228                                         expr = expr.replace( Expr.match[ type ], "" );
 229
 230                                         if ( !anyFound ) {
 231                                                 return [];
 232                                         }
 233
 234                                         break;
 235                                 }
 236                         }
 237                 }
 238
 239                 expr = expr.replace(/\s*,\s*/, "");
 240
 241                 // Improper expression
 242                 if ( expr == old ) {
 243                         if ( anyFound == null ) {
 244                                 throw "Syntax error, unrecognized expression: " + expr;
 245                         } else {
 246                                 break;
 247                         }
 248                 }
 249
 250                 old = expr;
 251         }
 252
 253         return curLoop;
 254 };
 255
 256 var Expr = Sizzle.selectors = {
 257         order: [ "ID", "NAME", "TAG" ],
 258         match: {
 259                 ID: /#((?:[\w\u00c0-\uFFFF_-]|\\.)+)/,
 260                 CLASS: /\.((?:[\w\u00c0-\uFFFF_-]|\\.)+)/,
 261                 NAME: /\[name=['"]*((?:[\w\u00c0-\uFFFF_-]|\\.)+)['"]*\]/,
 262                 ATTR: /\[\s*((?:[\w\u00c0-\uFFFF_-]|\\.)+)\s*(?:(\S?=)\s*(['"]*)(.*?)\3|)\s*\]/,
 263                 TAG: /^((?:[\w\u00c0-\uFFFF\*_-]|\\.)+)/,
 264                 CHILD: /:(only|nth|last|first)-child(?:\((even|odd|[\dn+-]*)\))?/,
 265                 POS: /:(nth|eq|gt|lt|first|last|even|odd)(?:\((\d*)\))?(?=[^-]|$)/,
 266                 PSEUDO: /:((?:[\w\u00c0-\uFFFF_-]|\\.)+)(?:\((['"]*)((?:\([^\)]+\)|[^\2\(\)]*)+)\2\))?/
 267         },
 268         attrMap: {
 269                 "class": "className",
 270                 "for": "htmlFor"
 271         },
 272         attrHandle: {
 273                 href: function(elem){
 274                         return elem.getAttribute("href");
 275                 }
 276         },
 277         relative: {
 278                 "+": function(checkSet, part){
 279                         for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 280                                 var elem = checkSet[i];
 281                                 if ( elem ) {
 282                                         var cur = elem.previousSibling;
 283                                         while ( cur && cur.nodeType !== 1 ) {
 284                                                 cur = cur.previousSibling;
 285                                         }
 286                                         checkSet[i] = typeof part === "string" ?
 287                                                 cur || false :
 288                                                 cur === part;
 289                                 }
 290                         }
 291
 292                         if ( typeof part === "string" ) {
 293                                 Sizzle.filter( part, checkSet, true );
 294                         }
 295                 },
 296                 ">": function(checkSet, part, isXML){
 297                         if ( typeof part === "string" && !/\W/.test(part) ) {
 298                                 part = isXML ? part : part.toUpperCase();
 299
 300                                 for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 301                                         var elem = checkSet[i];
 302                                         if ( elem ) {
 303                                                 var parent = elem.parentNode;
 304                                                 checkSet[i] = parent.nodeName === part ? parent : false;
 305                                         }
 306                                 }
 307                         } else {
 308                                 for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 309                                         var elem = checkSet[i];
 310                                         if ( elem ) {
 311                                                 checkSet[i] = typeof part === "string" ?
 312                                                         elem.parentNode :
 313                                                         elem.parentNode === part;
 314                                         }
 315                                 }
 316
 317                                 if ( typeof part === "string" ) {
 318                                         Sizzle.filter( part, checkSet, true );
 319                                 }
 320                         }
 321                 },
 322                 "": function(checkSet, part, isXML){
 323                         var doneName = "done" + (done++), checkFn = dirCheck;
 324
 325                         if ( !part.match(/\W/) ) {
 326                                 var nodeCheck = part = isXML ? part : part.toUpperCase();
 327                                 checkFn = dirNodeCheck;
 328                         }
 329
 330                         checkFn("parentNode", part, doneName, checkSet, nodeCheck, isXML);
 331                 },
 332                 "~": function(checkSet, part, isXML){
 333                         var doneName = "done" + (done++), checkFn = dirCheck;
 334
 335                         if ( typeof part === "string" && !part.match(/\W/) ) {
 336                                 var nodeCheck = part = isXML ? part : part.toUpperCase();
 337                                 checkFn = dirNodeCheck;
 338                         }
 339
 340                         checkFn("previousSibling", part, doneName, checkSet, nodeCheck, isXML);
 341                 }
 342         },
 343         find: {
 344                 ID: function(match, context){
 345                         if ( context.getElementById ) {
 346                                 var m = context.getElementById(match[1]);
 347                                 return m ? [m] : [];
 348                         }
 349                 },
 350                 NAME: function(match, context){
 351                         return context.getElementsByName ? context.getElementsByName(match[1]) : null;
 352                 },
 353                 TAG: function(match, context){
 354                         return context.getElementsByTagName(match[1]);
 355                 }
 356         },
 357         preFilter: {
 358                 CLASS: function(match, curLoop, inplace, result, not){
 359                         match = " " + match[1].replace(/\\/g, "") + " ";
 360
 361                         for ( var i = 0; curLoop[i]; i++ ) {
 362                                 if ( not ^ (" " + curLoop[i].className + " ").indexOf(match) >= 0 ) {
 363                                         if ( !inplace )
 364                                                 result.push( curLoop[i] );
 365                                 } else if ( inplace ) {
 366                                         curLoop[i] = false;
 367                                 }
 368                         }
 369
 370                         return false;
 371                 },
 372                 ID: function(match){
 373                         return match[1].replace(/\\/g, "");
 374                 },
 375                 TAG: function(match, curLoop){
 376                         for ( var i = 0; !curLoop[i]; i++ ){}
 377                         return isXML(curLoop[i]) ? match[1] : match[1].toUpperCase();
 378                 },
 379                 CHILD: function(match){
 380                         if ( match[1] == "nth" ) {
 381                                 // parse equations like 'even', 'odd', '5', '2n', '3n+2', '4n-1', '-n+6'
 382                                 var test = /(-?)(\d*)n((?:\+|-)?\d*)/.exec(
 383                                         match[2] == "even" && "2n" || match[2] == "odd" && "2n+1" ||
 384                                         !/\D/.test( match[2] ) && "0n+" + match[2] || match[2]);
 385
 386                                 // calculate the numbers (first)n+(last) including if they are negative
 387                                 match[2] = (test[1] + (test[2] || 1)) - 0;
 388                                 match[3] = test[3] - 0;
 389                         }
 390
 391                         // TODO: Move to normal caching system
 392                         match[0] = "done" + (done++);
 393
 394                         return match;
 395                 },
 396                 ATTR: function(match){
 397                         var name = match[1];
 398
 399                         if ( Expr.attrMap[name] ) {
 400                                 match[1] = Expr.attrMap[name];
 401                         }
 402
 403                         if ( match[2] === "~=" ) {
 404                                 match[4] = " " + match[4] + " ";
 405                         }
 406
 407                         return match;
 408                 },
 409                 PSEUDO: function(match, curLoop, inplace, result, not){
 410                         if ( match[1] === "not" ) {
 411                                 // If we're dealing with a complex expression, or a simple one
 412                                 if ( match[3].match(chunker).length > 1 ) {
 413                                         match[3] = Sizzle(match[3], null, null, curLoop);
 414                                 } else {
 415                                         var ret = Sizzle.filter(match[3], curLoop, inplace, true ^ not);
 416                                         if ( !inplace ) {
 417                                                 result.push.apply( result, ret );
 418                                         }
 419                                         return false;
 420                                 }
 421                         } else if ( Expr.match.POS.test( match[0] ) ) {
 422                                 return true;
 423                         }
 424
 425                         return match;
 426                 },
 427                 POS: function(match){
 428                         match.unshift( true );
 429                         return match;
 430                 }
 431         },
 432         filters: {
 433                 enabled: function(elem){
 434                         return elem.disabled === false && elem.type !== "hidden";
 435                 },
 436                 disabled: function(elem){
 437                         return elem.disabled === true;
 438                 },
 439                 checked: function(elem){
 440                         return elem.checked === true;
 441                 },
 442                 selected: function(elem){
 443                         // Accessing this property makes selected-by-default
 444                         // options in Safari work properly
 445                         elem.parentNode.selectedIndex;
 446                         return elem.selected === true;
 447                 },
 448                 parent: function(elem){
 449                         return !!elem.firstChild;
 450                 },
 451                 empty: function(elem){
 452                         return !elem.firstChild;
 453                 },
 454                 has: function(elem, i, match){
 455                         return !!Sizzle( match[3], elem ).length;
 456                 },
 457                 header: function(elem){
 458                         return /h\d/i.test( elem.nodeName );
 459                 },
 460                 text: function(elem){
 461                         return "text" === elem.type;
 462                 },
 463                 radio: function(elem){
 464                         return "radio" === elem.type;
 465                 },
 466                 checkbox: function(elem){
 467                         return "checkbox" === elem.type;
 468                 },
 469                 file: function(elem){
 470                         return "file" === elem.type;
 471                 },
 472                 password: function(elem){
 473                         return "password" === elem.type;
 474                 },
 475                 submit: function(elem){
 476                         return "submit" === elem.type;
 477                 },
 478                 image: function(elem){
 479                         return "image" === elem.type;
 480                 },
 481                 reset: function(elem){
 482                         return "reset" === elem.type;
 483                 },
 484                 button: function(elem){
 485                         return "button" === elem.type || elem.nodeName.toUpperCase() === "BUTTON";
 486                 },
 487                 input: function(elem){
 488                         return /input|select|textarea|button/i.test(elem.nodeName);
 489                 }
 490         },
 491         setFilters: {
 492                 first: function(elem, i){
 493                         return i === 0;
 494                 },
 495                 last: function(elem, i, match, array){
 496                         return i === array.length - 1;
 497                 },
 498                 even: function(elem, i){
 499                         return i % 2 === 0;
 500                 },
 501                 odd: function(elem, i){
 502                         return i % 2 === 1;
 503                 },
 504                 lt: function(elem, i, match){
 505                         return i < match[3] - 0;
 506                 },
 507                 gt: function(elem, i, match){
 508                         return i > match[3] - 0;
 509                 },
 510                 nth: function(elem, i, match){
 511                         return match[3] - 0 == i;
 512                 },
 513                 eq: function(elem, i, match){
 514                         return match[3] - 0 == i;
 515                 }
 516         },
 517         filter: {
 518                 CHILD: function(elem, match){
 519                         var type = match[1], parent = elem.parentNode;
 520
 521                         var doneName = "child" + parent.childNodes.length;
 522
 523                         if ( parent && (!parent[ doneName ] || !elem.nodeIndex) ) {
 524                                 var count = 1;
 525
 526                                 for ( var node = parent.firstChild; node; node = node.nextSibling ) {
 527                                         if ( node.nodeType == 1 ) {
 528                                                 node.nodeIndex = count++;
 529                                         }
 530                                 }
 531
 532                                 parent[ doneName ] = count - 1;
 533                         }
 534
 535                         if ( type == "first" ) {
 536                                 return elem.nodeIndex == 1;
 537                         } else if ( type == "last" ) {
 538                                 return elem.nodeIndex == parent[ doneName ];
 539                         } else if ( type == "only" ) {
 540                                 return parent[ doneName ] == 1;
 541                         } else if ( type == "nth" ) {
 542                                 var add = false, first = match[2], last = match[3];
 543
 544                                 if ( first == 1 && last == 0 ) {
 545                                         return true;
 546                                 }
 547
 548                                 if ( first == 0 ) {
 549                                         if ( elem.nodeIndex == last ) {
 550                                                 add = true;
 551                                         }
 552                                 } else if ( (elem.nodeIndex - last) % first == 0 && (elem.nodeIndex - last) / first >= 0 ) {
 553                                         add = true;
 554                                 }
 555
 556                                 return add;
 557                         }
 558                 },
 559                 PSEUDO: function(elem, match, i, array){
 560                         var name = match[1], filter = Expr.filters[ name ];
 561
 562                         if ( filter ) {
 563                                 return filter( elem, i, match, array );
 564                         } else if ( name === "contains" ) {
 565                                 return (elem.textContent || elem.innerText || "").indexOf(match[3]) >= 0;
 566                         } else if ( name === "not" ) {
 567                                 var not = match[3];
 568
 569                                 for ( var i = 0, l = not.length; i < l; i++ ) {
 570                                         if ( not[i] === elem ) {
 571                                                 return false;
 572                                         }
 573                                 }
 574
 575                                 return true;
 576                         }
 577                 },
 578                 ID: function(elem, match){
 579                         return elem.nodeType === 1 && elem.getAttribute("id") === match;
 580                 },
 581                 TAG: function(elem, match){
 582                         return (match === "*" && elem.nodeType === 1) || elem.nodeName === match;
 583                 },
 584                 CLASS: function(elem, match){
 585                         return match.test( elem.className );
 586                 },
 587                 ATTR: function(elem, match){
 588                         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];
 589                         return result == null ?
 590                                 false :
 591                                 type === "=" ?
 592                                 value === check :
 593                                 type === "*=" ?
 594                                 value.indexOf(check) >= 0 :
 595                                 type === "~=" ?
 596                                 (" " + value + " ").indexOf(check) >= 0 :
 597                                 !match[4] ?
 598                                 result :
 599                                 type === "!=" ?
 600                                 value != check :
 601                                 type === "^=" ?
 602                                 value.indexOf(check) === 0 :
 603                                 type === "$=" ?
 604                                 value.substr(value.length - check.length) === check :
 605                                 type === "|=" ?
 606                                 value === check || value.substr(0, check.length + 1) === check + "-" :
 607                                 false;
 608                 },
 609                 POS: function(elem, match, i, array){
 610                         var name = match[2], filter = Expr.setFilters[ name ];
 611
 612                         if ( filter ) {
 613                                 return filter( elem, i, match, array );
 614                         }
 615                 }
 616         }
 617 };
 618
 619 for ( var type in Expr.match ) {
 620         Expr.match[ type ] = RegExp( Expr.match[ type ].source + /(?![^\[]*\])(?![^\(]*\))/.source );
 621 }
 622
 623 var makeArray = function(array, results) {
 624         array = Array.prototype.slice.call( array );
 625
 626         if ( results ) {
 627                 results.push.apply( results, array );
 628                 return results;
 629         }
 630
 631         return array;
 632 };
 633
 634 // Perform a simple check to determine if the browser is capable of
 635 // converting a NodeList to an array using builtin methods.
 636 try {
 637         Array.prototype.slice.call( document.documentElement.childNodes );
 638
 639 // Provide a fallback method if it does not work
 640 } catch(e){
 641         makeArray = function(array, results) {
 642                 var ret = results || [];
 643
 644                 if ( toString.call(array) === "[object Array]" ) {
 645                         Array.prototype.push.apply( ret, array );
 646                 } else {
 647                         if ( typeof array.length === "number" ) {
 648                                 for ( var i = 0, l = array.length; i < l; i++ ) {
 649                                         ret.push( array[i] );
 650                                 }
 651                         } else {
 652                                 for ( var i = 0; array[i]; i++ ) {
 653                                         ret.push( array[i] );
 654                                 }
 655                         }
 656                 }
 657
 658                 return ret;
 659         };
 660 }
 661
 662 // Check to see if the browser returns elements by name when
 663 // querying by getElementById (and provide a workaround)
 664 (function(){
 665         // We're going to inject a fake input element with a specified name
 666         var form = document.createElement("form"),
 667                 id = "script" + (new Date).getTime();
 668         form.innerHTML = "<input name='" + id + "'/>";
 669
 670         // Inject it into the root element, check its status, and remove it quickly
 671         var root = document.documentElement;
 672         root.insertBefore( form, root.firstChild );
 673
 674         // The workaround has to do additional checks after a getElementById
 675         // Which slows things down for other browsers (hence the branching)
 676         if ( !!document.getElementById( id ) ) {
 677                 Expr.find.ID = function(match, context){
 678                         if ( context.getElementById ) {
 679                                 var m = context.getElementById(match[1]);
 680                                 return m ? m.id === match[1] || m.getAttributeNode && m.getAttributeNode("id").nodeValue === match[1] ? [m] : undefined : [];
 681                         }
 682                 };
 683
 684                 Expr.filter.ID = function(elem, match){
 685                         var node = elem.getAttributeNode && elem.getAttributeNode("id");
 686                         return elem.nodeType === 1 && node && node.nodeValue === match;
 687                 };
 688         }
 689
 690         root.removeChild( form );
 691 })();
 692
 693 (function(){
 694         // Check to see if the browser returns only elements
 695         // when doing getElementsByTagName("*")
 696
 697         // Create a fake element
 698         var div = document.createElement("div");
 699         div.appendChild( document.createComment("") );
 700
 701         // Make sure no comments are found
 702         if ( div.getElementsByTagName("*").length > 0 ) {
 703                 Expr.find.TAG = function(match, context){
 704                         var results = context.getElementsByTagName(match[1]);
 705
 706                         // Filter out possible comments
 707                         if ( match[1] === "*" ) {
 708                                 var tmp = [];
 709
 710                                 for ( var i = 0; results[i]; i++ ) {
 711                                         if ( results[i].nodeType === 1 ) {
 712                                                 tmp.push( results[i] );
 713                                         }
 714                                 }
 715
 716                                 results = tmp;
 717                         }
 718
 719                         return results;
 720                 };
 721         }
 722
 723         // Check to see if an attribute returns normalized href attributes
 724         div.innerHTML = "<a href='#'></a>";
 725         if ( div.firstChild.getAttribute("href") !== "#" ) {
 726                 Expr.attrHandle.href = function(elem){
 727                         return elem.getAttribute("href", 2);
 728                 };
 729         }
 730 })();
 731
 732 if ( document.querySelectorAll ) (function(){
 733         var oldSizzle = Sizzle;
 734
 735         Sizzle = function(query, context, extra, seed){
 736                 context = context || document;
 737
 738                 if ( !seed && context.nodeType === 9 ) {
 739                         try {
 740                                 return makeArray( context.querySelectorAll(query), extra );
 741                         } catch(e){}
 742                 }
 743
 744                 return oldSizzle(query, context, extra, seed);
 745         };
 746
 747         Sizzle.find = oldSizzle.find;
 748         Sizzle.filter = oldSizzle.filter;
 749         Sizzle.selectors = oldSizzle.selectors;
 750         Sizzle.matches = oldSizzle.matches;
 751 })();
 752
 753 if ( document.documentElement.getElementsByClassName ) {
 754         Expr.order.splice(1, 0, "CLASS");
 755         Expr.find.CLASS = function(match, context) {
 756                 return context.getElementsByClassName(match[1]);
 757         };
 758 }
 759
 760 function dirNodeCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
 761         for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 762                 var elem = checkSet[i];
 763                 if ( elem ) {
 764                         elem = elem[dir];
 765                         var match = false;
 766
 767                         while ( elem && elem.nodeType ) {
 768                                 var done = elem[doneName];
 769                                 if ( done ) {
 770                                         match = checkSet[ done ];
 771                                         break;
 772                                 }
 773
 774                                 if ( elem.nodeType === 1 && !isXML )
 775                                         elem[doneName] = i;
 776
 777                                 if ( elem.nodeName === cur ) {
 778                                         match = elem;
 779                                         break;
 780                                 }
 781
 782                                 elem = elem[dir];
 783                         }
 784
 785                         checkSet[i] = match;
 786                 }
 787         }
 788 }
 789
 790 function dirCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
 791         for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 792                 var elem = checkSet[i];
 793                 if ( elem ) {
 794                         elem = elem[dir];
 795                         var match = false;
 796
 797                         while ( elem && elem.nodeType ) {
 798                                 if ( elem[doneName] ) {
 799                                         match = checkSet[ elem[doneName] ];
 800                                         break;
 801                                 }
 802
 803                                 if ( elem.nodeType === 1 ) {
 804                                         if ( !isXML )
 805                                                 elem[doneName] = i;
 806
 807                                         if ( typeof cur !== "string" ) {
 808                                                 if ( elem === cur ) {
 809                                                         match = true;
 810                                                         break;
 811                                                 }
 812
 813                                         } else if ( Sizzle.filter( cur, [elem] ).length > 0 ) {
 814                                                 match = elem;
 815                                                 break;
 816                                         }
 817                                 }
 818
 819                                 elem = elem[dir];
 820                         }
 821
 822                         checkSet[i] = match;
 823                 }
 824         }
 825 }
 826
 827 var contains = document.compareDocumentPosition ?  function(a, b){
 828         return a.compareDocumentPosition(b) & 16;
 829 } : function(a, b){
 830         return a !== b && (a.contains ? a.contains(b) : true);
 831 };
 832
 833 var isXML = function(elem){
 834         return elem.documentElement && !elem.body ||
 835                 elem.tagName && elem.ownerDocument && !elem.ownerDocument.body;
 836 };
 837
 838 // EXPOSE
 839 jQuery.find = Sizzle;
 840 jQuery.filter = Sizzle.filter;
 841 jQuery.expr = Sizzle.selectors;
 842 jQuery.expr[":"] = jQuery.expr.filters;
 843
 844 Sizzle.selectors.filters.hidden = function(elem){
 845         return "hidden" === elem.type ||
 846                 jQuery.css(elem, "display") === "none" ||
 847                 jQuery.css(elem, "visibility") === "hidden";
 848 };
 849
 850 Sizzle.selectors.filters.visible = function(elem){
 851         return "hidden" !== elem.type &&
 852                 jQuery.css(elem, "display") !== "none" &&
 853                 jQuery.css(elem, "visibility") !== "hidden";
 854 };
 855
 856 Sizzle.selectors.filters.animated = function(elem){
 857         return jQuery.grep(jQuery.timers, function(fn){
 858                 return elem === fn.elem;
 859         }).length;
 860 };
 861
 862 jQuery.multiFilter = function( expr, elems, not ) {
 863         if ( not ) {
 864                 expr = ":not(" + expr + ")";
 865         }
 866
 867         return Sizzle.matches(expr, elems);
 868 };
 869
 870 jQuery.dir = function( elem, dir ){
 871         var matched = [], cur = elem[dir];
 872         while ( cur && cur != document ) {
 873                 if ( cur.nodeType == 1 )
 874                         matched.push( cur );
 875                 cur = cur[dir];
 876         }
 877         return matched;
 878 };
 879
 880 jQuery.nth = function(cur, result, dir, elem){
 881         result = result || 1;
 882         var num = 0;
 883
 884         for ( ; cur; cur = cur[dir] )
 885                 if ( cur.nodeType == 1 && ++num == result )
 886                         break;
 887
 888         return cur;
 889 };
 890
 891 jQuery.sibling = function(n, elem){
 892         var r = [];
 893
 894         for ( ; n; n = n.nextSibling ) {
 895                 if ( n.nodeType == 1 && n != elem )
 896                         r.push( n );
 897         }
 898
 899         return r;
 900 };
 901
 902 return;
 903
 904 window.Sizzle = Sizzle;
 905
 906 })();