src/selector.js

   1 /*!
   2  * Sizzle CSS Selector Engine - v0.9.3
   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, isXML(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                 if ( sortOrder ) {
 116                         hasDuplicate = false;
 117                         results.sort(sortOrder);
 118
 119                         if ( hasDuplicate ) {
 120                                 for ( var i = 1; i < results.length; i++ ) {
 121                                         if ( results[i] === results[i-1] ) {
 122                                                 results.splice(i--, 1);
 123                                         }
 124                                 }
 125                         }
 126                 }
 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, isXML){
 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, isXML );
 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 ], 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                                         }
 188                                 }
 189
 190                                 if ( match ) {
 191                                         for ( var i = 0; (item = curLoop[i]) != null; i++ ) {
 192                                                 if ( item ) {
 193                                                         found = filter( item, match, i, curLoop );
 194                                                         var pass = not ^ !!found;
 195
 196                                                         if ( inplace && found != null ) {
 197                                                                 if ( pass ) {
 198                                                                         anyFound = true;
 199                                                                 } else {
 200                                                                         curLoop[i] = false;
 201                                                                 }
 202                                                         } else if ( pass ) {
 203                                                                 result.push( item );
 204                                                                 anyFound = true;
 205                                                         }
 206                                                 }
 207                                         }
 208                                 }
 209
 210                                 if ( found !== undefined ) {
 211                                         if ( !inplace ) {
 212                                                 curLoop = result;
 213                                         }
 214
 215                                         expr = expr.replace( Expr.match[ type ], "" );
 216
 217                                         if ( !anyFound ) {
 218                                                 return [];
 219                                         }
 220
 221                                         break;
 222                                 }
 223                         }
 224                 }
 225
 226                 expr = expr.replace(/\s*,\s*/, "");
 227
 228                 // Improper expression
 229                 if ( expr == old ) {
 230                         if ( anyFound == null ) {
 231                                 throw "Syntax error, unrecognized expression: " + expr;
 232                         } else {
 233                                 break;
 234                         }
 235                 }
 236
 237                 old = expr;
 238         }
 239
 240         return curLoop;
 241 };
 242
 243 var Expr = Sizzle.selectors = {
 244         order: [ "ID", "NAME", "TAG" ],
 245         match: {
 246                 ID: /#((?:[\w\u00c0-\uFFFF_-]|\\.)+)/,
 247                 CLASS: /\.((?:[\w\u00c0-\uFFFF_-]|\\.)+)/,
 248                 NAME: /\[name=['"]*((?:[\w\u00c0-\uFFFF_-]|\\.)+)['"]*\]/,
 249                 ATTR: /\[\s*((?:[\w\u00c0-\uFFFF_-]|\\.)+)\s*(?:(\S?=)\s*(['"]*)(.*?)\3|)\s*\]/,
 250                 TAG: /^((?:[\w\u00c0-\uFFFF\*_-]|\\.)+)/,
 251                 CHILD: /:(only|nth|last|first)-child(?:\((even|odd|[\dn+-]*)\))?/,
 252                 POS: /:(nth|eq|gt|lt|first|last|even|odd)(?:\((\d*)\))?(?=[^-]|$)/,
 253                 PSEUDO: /:((?:[\w\u00c0-\uFFFF_-]|\\.)+)(?:\((['"]*)((?:\([^\)]+\)|[^\2\(\)]*)+)\2\))?/
 254         },
 255         attrMap: {
 256                 "class": "className",
 257                 "for": "htmlFor"
 258         },
 259         attrHandle: {
 260                 href: function(elem){
 261                         return elem.getAttribute("href");
 262                 }
 263         },
 264         relative: {
 265                 "+": function(checkSet, part, isXML){
 266                         var     isPartStr = typeof part === "string",
 267                                 isTag = isPartStr && !/\W/.test(part),
 268                                 isPartStrNotTag = isPartStr && !isTag;
 269                         if ( isTag && !isXML ) part = part.toUpperCase();
 270                         for ( var i = 0, l = checkSet.length, elem; i < l; i++ ) {
 271                                 if ( elem = checkSet[i] ) {
 272                                         while ( (elem = elem.previousSibling) && elem.nodeType !== 1 ) {};
 273                                         checkSet[i] = isPartStrNotTag || elem && elem.nodeName === part ?
 274                                                  elem : elem === part;
 275                                 }
 276                         }
 277                         if (isPartStrNotTag) {
 278                                 Sizzle.filter( part, checkSet, true );
 279                         }
 280                 },
 281                 ">": function(checkSet, part, isXML){
 282                         if ( typeof part === "string" && !/\W/.test(part) ) {
 283                                 part = isXML ? part : part.toUpperCase();
 284
 285                                 for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 286                                         var elem = checkSet[i];
 287                                         if ( elem ) {
 288                                                 var parent = elem.parentNode;
 289                                                 checkSet[i] = parent.nodeName === part ? parent : false;
 290                                         }
 291                                 }
 292                         } else {
 293                                 for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 294                                         var elem = checkSet[i];
 295                                         if ( elem ) {
 296                                                 checkSet[i] = typeof part === "string" ?
 297                                                         elem.parentNode :
 298                                                         elem.parentNode === part;
 299                                         }
 300                                 }
 301
 302                                 if ( typeof part === "string" ) {
 303                                         Sizzle.filter( part, checkSet, true );
 304                                 }
 305                         }
 306                 },
 307                 "": function(checkSet, part, isXML){
 308                         var doneName = done++, checkFn = dirCheck;
 309
 310                         if ( !part.match(/\W/) ) {
 311                                 var nodeCheck = part = isXML ? part : part.toUpperCase();
 312                                 checkFn = dirNodeCheck;
 313                         }
 314
 315                         checkFn("parentNode", part, doneName, checkSet, nodeCheck, isXML);
 316                 },
 317                 "~": function(checkSet, part, isXML){
 318                         var doneName = done++, checkFn = dirCheck;
 319
 320                         if ( typeof part === "string" && !part.match(/\W/) ) {
 321                                 var nodeCheck = part = isXML ? part : part.toUpperCase();
 322                                 checkFn = dirNodeCheck;
 323                         }
 324
 325                         checkFn("previousSibling", part, doneName, checkSet, nodeCheck, isXML);
 326                 }
 327         },
 328         find: {
 329                 ID: function(match, context, isXML){
 330                         if ( typeof context.getElementById !== "undefined" && !isXML ) {
 331                                 var m = context.getElementById(match[1]);
 332                                 return m ? [m] : [];
 333                         }
 334                 },
 335                 NAME: function(match, context, isXML){
 336                         if ( typeof context.getElementsByName !== "undefined" ) {
 337                                 var ret = context.getElementsByName(match[1]);
 338                                 return ret.length === 0 ? null : ret;
 339                         }
 340                 },
 341                 TAG: function(match, context){
 342                         return context.getElementsByTagName(match[1]);
 343                 }
 344         },
 345         preFilter: {
 346                 CLASS: function(match, curLoop, inplace, result, not){
 347                         match = " " + match[1].replace(/\\/g, "") + " ";
 348
 349                         for ( var i = 0, elem; (elem = curLoop[i]) != null; i++ ) {
 350                                 if ( elem ) {
 351                                         if ( not ^ (elem.className && (" " + elem.className + " ").indexOf(match) >= 0) ) {
 352                                                 if ( !inplace )
 353                                                         result.push( elem );
 354                                         } else if ( inplace ) {
 355                                                 curLoop[i] = false;
 356                                         }
 357                                 }
 358                         }
 359
 360                         return false;
 361                 },
 362                 ID: function(match){
 363                         return match[1].replace(/\\/g, "");
 364                 },
 365                 TAG: function(match, curLoop){
 366                         for ( var i = 0; curLoop[i] === false; i++ ){}
 367                         return curLoop[i] && isXML(curLoop[i]) ? match[1] : match[1].toUpperCase();
 368                 },
 369                 CHILD: function(match){
 370                         if ( match[1] == "nth" ) {
 371                                 // parse equations like 'even', 'odd', '5', '2n', '3n+2', '4n-1', '-n+6'
 372                                 var test = /(-?)(\d*)n((?:\+|-)?\d*)/.exec(
 373                                         match[2] == "even" && "2n" || match[2] == "odd" && "2n+1" ||
 374                                         !/\D/.test( match[2] ) && "0n+" + match[2] || match[2]);
 375
 376                                 // calculate the numbers (first)n+(last) including if they are negative
 377                                 match[2] = (test[1] + (test[2] || 1)) - 0;
 378                                 match[3] = test[3] - 0;
 379                         }
 380
 381                         // TODO: Move to normal caching system
 382                         match[0] = done++;
 383
 384                         return match;
 385                 },
 386                 ATTR: function(match){
 387                         var name = match[1].replace(/\\/g, "");
 388
 389                         if ( Expr.attrMap[name] ) {
 390                                 match[1] = Expr.attrMap[name];
 391                         }
 392
 393                         if ( match[2] === "~=" ) {
 394                                 match[4] = " " + match[4] + " ";
 395                         }
 396
 397                         return match;
 398                 },
 399                 PSEUDO: function(match, curLoop, inplace, result, not){
 400                         if ( match[1] === "not" ) {
 401                                 // If we're dealing with a complex expression, or a simple one
 402                                 if ( match[3].match(chunker).length > 1 ) {
 403                                         match[3] = Sizzle(match[3], null, null, curLoop);
 404                                 } else {
 405                                         var ret = Sizzle.filter(match[3], curLoop, inplace, true ^ not);
 406                                         if ( !inplace ) {
 407                                                 result.push.apply( result, ret );
 408                                         }
 409                                         return false;
 410                                 }
 411                         } else if ( Expr.match.POS.test( match[0] ) ) {
 412                                 return true;
 413                         }
 414
 415                         return match;
 416                 },
 417                 POS: function(match){
 418                         match.unshift( true );
 419                         return match;
 420                 }
 421         },
 422         filters: {
 423                 enabled: function(elem){
 424                         return elem.disabled === false && elem.type !== "hidden";
 425                 },
 426                 disabled: function(elem){
 427                         return elem.disabled === true;
 428                 },
 429                 checked: function(elem){
 430                         return elem.checked === true;
 431                 },
 432                 selected: function(elem){
 433                         // Accessing this property makes selected-by-default
 434                         // options in Safari work properly
 435                         elem.parentNode.selectedIndex;
 436                         return elem.selected === true;
 437                 },
 438                 parent: function(elem){
 439                         return !!elem.firstChild;
 440                 },
 441                 empty: function(elem){
 442                         return !elem.firstChild;
 443                 },
 444                 has: function(elem, i, match){
 445                         return !!Sizzle( match[3], elem ).length;
 446                 },
 447                 header: function(elem){
 448                         return /h\d/i.test( elem.nodeName );
 449                 },
 450                 text: function(elem){
 451                         return "text" === elem.type;
 452                 },
 453                 radio: function(elem){
 454                         return "radio" === elem.type;
 455                 },
 456                 checkbox: function(elem){
 457                         return "checkbox" === elem.type;
 458                 },
 459                 file: function(elem){
 460                         return "file" === elem.type;
 461                 },
 462                 password: function(elem){
 463                         return "password" === elem.type;
 464                 },
 465                 submit: function(elem){
 466                         return "submit" === elem.type;
 467                 },
 468                 image: function(elem){
 469                         return "image" === elem.type;
 470                 },
 471                 reset: function(elem){
 472                         return "reset" === elem.type;
 473                 },
 474                 button: function(elem){
 475                         return "button" === elem.type || elem.nodeName.toUpperCase() === "BUTTON";
 476                 },
 477                 input: function(elem){
 478                         return /input|select|textarea|button/i.test(elem.nodeName);
 479                 }
 480         },
 481         setFilters: {
 482                 first: function(elem, i){
 483                         return i === 0;
 484                 },
 485                 last: function(elem, i, match, array){
 486                         return i === array.length - 1;
 487                 },
 488                 even: function(elem, i){
 489                         return i % 2 === 0;
 490                 },
 491                 odd: function(elem, i){
 492                         return i % 2 === 1;
 493                 },
 494                 lt: function(elem, i, match){
 495                         return i < match[3] - 0;
 496                 },
 497                 gt: function(elem, i, match){
 498                         return i > match[3] - 0;
 499                 },
 500                 nth: function(elem, i, match){
 501                         return match[3] - 0 == i;
 502                 },
 503                 eq: function(elem, i, match){
 504                         return match[3] - 0 == i;
 505                 }
 506         },
 507         filter: {
 508                 CHILD: function(elem, match){
 509                         var type = match[1], node = elem;
 510                         switch (type) {
 511                                 case 'only':
 512                                 case 'first':
 513                                         while (node = node.previousSibling)  {
 514                                                 if ( node.nodeType === 1 ) return false;
 515                                         }
 516                                         if ( type == 'first') return true;
 517                                         node = elem;
 518                                 case 'last':
 519                                         while (node = node.nextSibling)  {
 520                                                 if ( node.nodeType === 1 ) return false;
 521                                         }
 522                                         return true;
 523                                 case 'nth':
 524                                         var first = match[2], last = match[3];
 525
 526                                         if ( first == 1 && last == 0 ) {
 527                                                 return true;
 528                                         }
 529
 530                                         var doneName = match[0],
 531                                                 parent = elem.parentNode;
 532
 533                                         if ( parent && (parent.sizcache !== doneName || !elem.nodeIndex) ) {
 534                                                 var count = 0;
 535                                                 for ( node = parent.firstChild; node; node = node.nextSibling ) {
 536                                                         if ( node.nodeType === 1 ) {
 537                                                                 node.nodeIndex = ++count;
 538                                                         }
 539                                                 }
 540                                                 parent.sizcache = doneName;
 541                                         }
 542
 543                                         var diff = elem.nodeIndex - last;
 544                                         if ( first == 0 ) {
 545                                                 return diff == 0;
 546                                         } else {
 547                                                 return ( diff % first == 0 && diff / first >= 0 );
 548                                         }
 549                         }
 550                 },
 551                 PSEUDO: function(elem, match, i, array){
 552                         var name = match[1], filter = Expr.filters[ name ];
 553
 554                         if ( filter ) {
 555                                 return filter( elem, i, match, array );
 556                         } else if ( name === "contains" ) {
 557                                 return (elem.textContent || elem.innerText || "").indexOf(match[3]) >= 0;
 558                         } else if ( name === "not" ) {
 559                                 var not = match[3];
 560
 561                                 for ( var i = 0, l = not.length; i < l; i++ ) {
 562                                         if ( not[i] === elem ) {
 563                                                 return false;
 564                                         }
 565                                 }
 566
 567                                 return true;
 568                         }
 569                 },
 570                 ID: function(elem, match){
 571                         return elem.nodeType === 1 && elem.getAttribute("id") === match;
 572                 },
 573                 TAG: function(elem, match){
 574                         return (match === "*" && elem.nodeType === 1) || elem.nodeName === match;
 575                 },
 576                 CLASS: function(elem, match){
 577                         return match.test( elem.className );
 578                 },
 579                 ATTR: function(elem, match){
 580                         var name = match[1],
 581                                 result = Expr.attrHandle[ name ] ?
 582                                         Expr.attrHandle[ name ]( elem ) :
 583                                         elem[ name ] != null ?
 584                                                 elem[ name ] :
 585                                                 elem.getAttribute( name ),
 586                                 value = result + "",
 587                                 type = match[2],
 588                                 check = match[4];
 589
 590                         return result == null ?
 591                                 type === "!=" :
 592                                 type === "=" ?
 593                                 value === check :
 594                                 type === "*=" ?
 595                                 value.indexOf(check) >= 0 :
 596                                 type === "~=" ?
 597                                 (" " + value + " ").indexOf(check) >= 0 :
 598                                 !check ?
 599                                 value && result !== false :
 600                                 type === "!=" ?
 601                                 value != check :
 602                                 type === "^=" ?
 603                                 value.indexOf(check) === 0 :
 604                                 type === "$=" ?
 605                                 value.substr(value.length - check.length) === check :
 606                                 type === "|=" ?
 607                                 value === check || value.substr(0, check.length + 1) === check + "-" :
 608                                 false;
 609                 },
 610                 POS: function(elem, match, i, array){
 611                         var name = match[2], filter = Expr.setFilters[ name ];
 612
 613                         if ( filter ) {
 614                                 return filter( elem, i, match, array );
 615                         }
 616                 }
 617         }
 618 };
 619
 620 var origPOS = Expr.match.POS;
 621
 622 for ( var type in Expr.match ) {
 623         Expr.match[ type ] = RegExp( Expr.match[ type ].source + /(?![^\[]*\])(?![^\(]*\))/.source );
 624 }
 625
 626 var makeArray = function(array, results) {
 627         array = Array.prototype.slice.call( array );
 628
 629         if ( results ) {
 630                 results.push.apply( results, array );
 631                 return results;
 632         }
 633
 634         return array;
 635 };
 636
 637 // Perform a simple check to determine if the browser is capable of
 638 // converting a NodeList to an array using builtin methods.
 639 try {
 640         Array.prototype.slice.call( document.documentElement.childNodes );
 641
 642 // Provide a fallback method if it does not work
 643 } catch(e){
 644         makeArray = function(array, results) {
 645                 var ret = results || [];
 646
 647                 if ( toString.call(array) === "[object Array]" ) {
 648                         Array.prototype.push.apply( ret, array );
 649                 } else {
 650                         if ( typeof array.length === "number" ) {
 651                                 for ( var i = 0, l = array.length; i < l; i++ ) {
 652                                         ret.push( array[i] );
 653                                 }
 654                         } else {
 655                                 for ( var i = 0; array[i]; i++ ) {
 656                                         ret.push( array[i] );
 657                                 }
 658                         }
 659                 }
 660
 661                 return ret;
 662         };
 663 }
 664
 665 var sortOrder;
 666
 667 if ( Array.prototype.indexOf ) {
 668         var indexOf = Array.prototype.indexOf,
 669                 allSort = document.getElementsByTagName("*");
 670
 671         sortOrder = function( a, b ) {
 672                 var ret = indexOf.call( allSort, a ) - indexOf.call( allSort, b );
 673                 if ( ret === 0 ) {
 674                         hasDuplicate = true;
 675                 }
 676                 return ret;
 677         };
 678 } else if ( document.documentElement.sourceIndex === 1 ) {
 679         sortOrder = function( a, b ) {
 680                 var ret = a.sourceIndex - b.sourceIndex;
 681                 if ( ret === 0 ) {
 682                         hasDuplicate = true;
 683                 }
 684                 return ret;
 685         };
 686 }
 687
 688 // Check to see if the browser returns elements by name when
 689 // querying by getElementById (and provide a workaround)
 690 (function(){
 691         // We're going to inject a fake input element with a specified name
 692         var form = document.createElement("form"),
 693                 id = "script" + (new Date).getTime();
 694         form.innerHTML = "<input name='" + id + "'/>";
 695
 696         // Inject it into the root element, check its status, and remove it quickly
 697         var root = document.documentElement;
 698         root.insertBefore( form, root.firstChild );
 699
 700         // The workaround has to do additional checks after a getElementById
 701         // Which slows things down for other browsers (hence the branching)
 702         if ( !!document.getElementById( id ) ) {
 703                 Expr.find.ID = function(match, context, isXML){
 704                         if ( typeof context.getElementById !== "undefined" && !isXML ) {
 705                                 var m = context.getElementById(match[1]);
 706                                 return m ? m.id === match[1] || typeof m.getAttributeNode !== "undefined" && m.getAttributeNode("id").nodeValue === match[1] ? [m] : undefined : [];
 707                         }
 708                 };
 709
 710                 Expr.filter.ID = function(elem, match){
 711                         var node = typeof elem.getAttributeNode !== "undefined" && elem.getAttributeNode("id");
 712                         return elem.nodeType === 1 && node && node.nodeValue === match;
 713                 };
 714         }
 715
 716         root.removeChild( form );
 717 })();
 718
 719 (function(){
 720         // Check to see if the browser returns only elements
 721         // when doing getElementsByTagName("*")
 722
 723         // Create a fake element
 724         var div = document.createElement("div");
 725         div.appendChild( document.createComment("") );
 726
 727         // Make sure no comments are found
 728         if ( div.getElementsByTagName("*").length > 0 ) {
 729                 Expr.find.TAG = function(match, context){
 730                         var results = context.getElementsByTagName(match[1]);
 731
 732                         // Filter out possible comments
 733                         if ( match[1] === "*" ) {
 734                                 var tmp = [];
 735
 736                                 for ( var i = 0; results[i]; i++ ) {
 737                                         if ( results[i].nodeType === 1 ) {
 738                                                 tmp.push( results[i] );
 739                                         }
 740                                 }
 741
 742                                 results = tmp;
 743                         }
 744
 745                         return results;
 746                 };
 747         }
 748
 749         // Check to see if an attribute returns normalized href attributes
 750         div.innerHTML = "<a href='#'></a>";
 751         if ( div.firstChild && typeof div.firstChild.getAttribute !== "undefined" &&
 752                         div.firstChild.getAttribute("href") !== "#" ) {
 753                 Expr.attrHandle.href = function(elem){
 754                         return elem.getAttribute("href", 2);
 755                 };
 756         }
 757 })();
 758
 759 if ( document.querySelectorAll ) (function(){
 760         var oldSizzle = Sizzle, div = document.createElement("div");
 761         div.innerHTML = "<p class='TEST'></p>";
 762
 763         // Safari can't handle uppercase or unicode characters when
 764         // in quirks mode.
 765         if ( div.querySelectorAll && div.querySelectorAll(".TEST").length === 0 ) {
 766                 return;
 767         }
 768
 769         Sizzle = function(query, context, extra, seed){
 770                 context = context || document;
 771
 772                 // Only use querySelectorAll on non-XML documents
 773                 // (ID selectors don't work in non-HTML documents)
 774                 if ( !seed && context.nodeType === 9 && !isXML(context) ) {
 775                         try {
 776                                 return makeArray( context.querySelectorAll(query), extra );
 777                         } catch(e){}
 778                 }
 779
 780                 return oldSizzle(query, context, extra, seed);
 781         };
 782
 783         Sizzle.find = oldSizzle.find;
 784         Sizzle.filter = oldSizzle.filter;
 785         Sizzle.selectors = oldSizzle.selectors;
 786         Sizzle.matches = oldSizzle.matches;
 787 })();
 788
 789 if ( document.getElementsByClassName && document.documentElement.getElementsByClassName ) (function(){
 790         var div = document.createElement("div");
 791         div.innerHTML = "<div class='test e'></div><div class='test'></div>";
 792
 793         // Opera can't find a second classname (in 9.6)
 794         if ( div.getElementsByClassName("e").length === 0 )
 795                 return;
 796
 797         // Safari caches class attributes, doesn't catch changes (in 3.2)
 798         div.lastChild.className = "e";
 799
 800         if ( div.getElementsByClassName("e").length === 1 )
 801                 return;
 802
 803         Expr.order.splice(1, 0, "CLASS");
 804         Expr.find.CLASS = function(match, context) {
 805                 return context.getElementsByClassName(match[1]);
 806         };
 807 })();
 808
 809 function dirNodeCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
 810         var sibDir = dir == "previousSibling" && !isXML;
 811         for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 812                 var elem = checkSet[i];
 813                 if ( elem ) {
 814                         if ( sibDir && elem.nodeType === 1 ){
 815                                 elem.sizcache = doneName;
 816                                 elem.sizset = i;
 817                         }
 818                         elem = elem[dir];
 819                         var match = false;
 820
 821                         while ( elem ) {
 822                                 if ( elem.sizcache === doneName ) {
 823                                         match = checkSet[elem.sizset];
 824                                         break;
 825                                 }
 826
 827                                 if ( elem.nodeType === 1 && !isXML ){
 828                                         elem.sizcache = doneName;
 829                                         elem.sizset = i;
 830                                 }
 831
 832                                 if ( elem.nodeName === cur ) {
 833                                         match = elem;
 834                                         break;
 835                                 }
 836
 837                                 elem = elem[dir];
 838                         }
 839
 840                         checkSet[i] = match;
 841                 }
 842         }
 843 }
 844
 845 function dirCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
 846         var sibDir = dir == "previousSibling" && !isXML;
 847         for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 848                 var elem = checkSet[i];
 849                 if ( elem ) {
 850                         if ( sibDir && elem.nodeType === 1 ) {
 851                                 elem.sizcache = doneName;
 852                                 elem.sizset = i;
 853                         }
 854                         elem = elem[dir];
 855                         var match = false;
 856
 857                         while ( elem ) {
 858                                 if ( elem.sizcache === doneName ) {
 859                                         match = checkSet[elem.sizset];
 860                                         break;
 861                                 }
 862
 863                                 if ( elem.nodeType === 1 ) {
 864                                         if ( !isXML ) {
 865                                                 elem.sizcache = doneName;
 866                                                 elem.sizset = i;
 867                                         }
 868                                         if ( typeof cur !== "string" ) {
 869                                                 if ( elem === cur ) {
 870                                                         match = true;
 871                                                         break;
 872                                                 }
 873
 874                                         } else if ( Sizzle.filter( cur, [elem] ).length > 0 ) {
 875                                                 match = elem;
 876                                                 break;
 877                                         }
 878                                 }
 879
 880                                 elem = elem[dir];
 881                         }
 882
 883                         checkSet[i] = match;
 884                 }
 885         }
 886 }
 887
 888 var contains = document.compareDocumentPosition ?  function(a, b){
 889         return a.compareDocumentPosition(b) & 16;
 890 } : function(a, b){
 891         return a !== b && (a.contains ? a.contains(b) : true);
 892 };
 893
 894 var isXML = function(elem){
 895         return elem.nodeType === 9 && elem.documentElement.nodeName !== "HTML" ||
 896                 !!elem.ownerDocument && isXML( elem.ownerDocument );
 897 };
 898
 899 var posProcess = function(selector, context){
 900         var tmpSet = [], later = "", match,
 901                 root = context.nodeType ? [context] : context;
 902
 903         // Position selectors must be done after the filter
 904         // And so must :not(positional) so we move all PSEUDOs to the end
 905         while ( (match = Expr.match.PSEUDO.exec( selector )) ) {
 906                 later += match[0];
 907                 selector = selector.replace( Expr.match.PSEUDO, "" );
 908         }
 909
 910         selector = Expr.relative[selector] ? selector + "*" : selector;
 911
 912         for ( var i = 0, l = root.length; i < l; i++ ) {
 913                 Sizzle( selector, root[i], tmpSet );
 914         }
 915
 916         return Sizzle.filter( later, tmpSet );
 917 };
 918
 919 // EXPOSE
 920 jQuery.find = Sizzle;
 921 jQuery.filter = Sizzle.filter;
 922 jQuery.expr = Sizzle.selectors;
 923 jQuery.expr[":"] = jQuery.expr.filters;
 924
 925 Sizzle.selectors.filters.hidden = function(elem){
 926         return "hidden" === elem.type ||
 927                 jQuery.css(elem, "display") === "none" ||
 928                 jQuery.css(elem, "visibility") === "hidden";
 929 };
 930
 931 Sizzle.selectors.filters.visible = function(elem){
 932         return "hidden" !== elem.type &&
 933                 jQuery.css(elem, "display") !== "none" &&
 934                 jQuery.css(elem, "visibility") !== "hidden";
 935 };
 936
 937 Sizzle.selectors.filters.animated = function(elem){
 938         return jQuery.grep(jQuery.timers, function(fn){
 939                 return elem === fn.elem;
 940         }).length;
 941 };
 942
 943 jQuery.multiFilter = function( expr, elems, not ) {
 944         if ( not ) {
 945                 expr = ":not(" + expr + ")";
 946         }
 947
 948         return Sizzle.matches(expr, elems);
 949 };
 950
 951 jQuery.dir = function( elem, dir ){
 952         var matched = [], cur = elem[dir];
 953         while ( cur && cur != document ) {
 954                 if ( cur.nodeType == 1 )
 955                         matched.push( cur );
 956                 cur = cur[dir];
 957         }
 958         return matched;
 959 };
 960
 961 jQuery.nth = function(cur, result, dir, elem){
 962         result = result || 1;
 963         var num = 0;
 964
 965         for ( ; cur; cur = cur[dir] )
 966                 if ( cur.nodeType == 1 && ++num == result )
 967                         break;
 968
 969         return cur;
 970 };
 971
 972 jQuery.sibling = function(n, elem){
 973         var r = [];
 974
 975         for ( ; n; n = n.nextSibling ) {
 976                 if ( n.nodeType == 1 && n != elem )
 977                         r.push( n );
 978         }
 979
 980         return r;
 981 };
 982
 983 return;
 984
 985 window.Sizzle = Sizzle;
 986
 987 })();