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" && !isXML ) {
 337                                 return context.getElementsByName(match[1]);
 338                         }
 339                 },
 340                 TAG: function(match, context){
 341                         return context.getElementsByTagName(match[1]);
 342                 }
 343         },
 344         preFilter: {
 345                 CLASS: function(match, curLoop, inplace, result, not){
 346                         match = " " + match[1].replace(/\\/g, "") + " ";
 347
 348                         for ( var i = 0, elem; (elem = curLoop[i]) != null; i++ ) {
 349                                 if ( elem ) {
 350                                         if ( not ^ (elem.className && (" " + elem.className + " ").indexOf(match) >= 0) ) {
 351                                                 if ( !inplace )
 352                                                         result.push( elem );
 353                                         } else if ( inplace ) {
 354                                                 curLoop[i] = false;
 355                                         }
 356                                 }
 357                         }
 358
 359                         return false;
 360                 },
 361                 ID: function(match){
 362                         return match[1].replace(/\\/g, "");
 363                 },
 364                 TAG: function(match, curLoop){
 365                         for ( var i = 0; curLoop[i] === false; i++ ){}
 366                         return curLoop[i] && isXML(curLoop[i]) ? match[1] : match[1].toUpperCase();
 367                 },
 368                 CHILD: function(match){
 369                         if ( match[1] == "nth" ) {
 370                                 // parse equations like 'even', 'odd', '5', '2n', '3n+2', '4n-1', '-n+6'
 371                                 var test = /(-?)(\d*)n((?:\+|-)?\d*)/.exec(
 372                                         match[2] == "even" && "2n" || match[2] == "odd" && "2n+1" ||
 373                                         !/\D/.test( match[2] ) && "0n+" + match[2] || match[2]);
 374
 375                                 // calculate the numbers (first)n+(last) including if they are negative
 376                                 match[2] = (test[1] + (test[2] || 1)) - 0;
 377                                 match[3] = test[3] - 0;
 378                         }
 379
 380                         // TODO: Move to normal caching system
 381                         match[0] = done++;
 382
 383                         return match;
 384                 },
 385                 ATTR: function(match){
 386                         var name = match[1].replace(/\\/g, "");
 387
 388                         if ( Expr.attrMap[name] ) {
 389                                 match[1] = Expr.attrMap[name];
 390                         }
 391
 392                         if ( match[2] === "~=" ) {
 393                                 match[4] = " " + match[4] + " ";
 394                         }
 395
 396                         return match;
 397                 },
 398                 PSEUDO: function(match, curLoop, inplace, result, not){
 399                         if ( match[1] === "not" ) {
 400                                 // If we're dealing with a complex expression, or a simple one
 401                                 if ( match[3].match(chunker).length > 1 ) {
 402                                         match[3] = Sizzle(match[3], null, null, curLoop);
 403                                 } else {
 404                                         var ret = Sizzle.filter(match[3], curLoop, inplace, true ^ not);
 405                                         if ( !inplace ) {
 406                                                 result.push.apply( result, ret );
 407                                         }
 408                                         return false;
 409                                 }
 410                         } else if ( Expr.match.POS.test( match[0] ) ) {
 411                                 return true;
 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], node = elem;
 509                         switch (type) {
 510                                 case 'only':
 511                                 case 'first':
 512                                         while (node = node.previousSibling)  {
 513                                                 if ( node.nodeType === 1 ) return false;
 514                                         }
 515                                         if ( type == 'first') return true;
 516                                         node = elem;
 517                                 case 'last':
 518                                         while (node = node.nextSibling)  {
 519                                                 if ( node.nodeType === 1 ) return false;
 520                                         }
 521                                         return true;
 522                                 case 'nth':
 523                                         var first = match[2], last = match[3];
 524
 525                                         if ( first == 1 && last == 0 ) {
 526                                                 return true;
 527                                         }
 528
 529                                         var doneName = match[0],
 530                                                 parent = elem.parentNode;
 531
 532                                         if ( parent && (parent.sizcache !== doneName || !elem.nodeIndex) ) {
 533                                                 var count = 0;
 534                                                 for ( node = parent.firstChild; node; node = node.nextSibling ) {
 535                                                         if ( node.nodeType === 1 ) {
 536                                                                 node.nodeIndex = ++count;
 537                                                         }
 538                                                 }
 539                                                 parent.sizcache = doneName;
 540                                         }
 541
 542                                         var diff = elem.nodeIndex - last;
 543                                         if ( first == 0 ) {
 544                                                 return diff == 0;
 545                                         } else {
 546                                                 return ( diff % first == 0 && diff / first >= 0 );
 547                                         }
 548                         }
 549                 },
 550                 PSEUDO: function(elem, match, i, array){
 551                         var name = match[1], filter = Expr.filters[ name ];
 552
 553                         if ( filter ) {
 554                                 return filter( elem, i, match, array );
 555                         } else if ( name === "contains" ) {
 556                                 return (elem.textContent || elem.innerText || "").indexOf(match[3]) >= 0;
 557                         } else if ( name === "not" ) {
 558                                 var not = match[3];
 559
 560                                 for ( var i = 0, l = not.length; i < l; i++ ) {
 561                                         if ( not[i] === elem ) {
 562                                                 return false;
 563                                         }
 564                                 }
 565
 566                                 return true;
 567                         }
 568                 },
 569                 ID: function(elem, match){
 570                         return elem.nodeType === 1 && elem.getAttribute("id") === match;
 571                 },
 572                 TAG: function(elem, match){
 573                         return (match === "*" && elem.nodeType === 1) || elem.nodeName === match;
 574                 },
 575                 CLASS: function(elem, match){
 576                         return match.test( elem.className );
 577                 },
 578                 ATTR: function(elem, match){
 579                         var name = match[1],
 580                                 result = Expr.attrHandle[ name ] ?
 581                                         Expr.attrHandle[ name ]( elem ) :
 582                                         elem[ name ] != null ?
 583                                                 elem[ name ] :
 584                                                 elem.getAttribute( name ),
 585                                 value = result + "",
 586                                 type = match[2],
 587                                 check = match[4];
 588
 589                         return result == null ?
 590                                 type === "!=" :
 591                                 type === "=" ?
 592                                 value === check :
 593                                 type === "*=" ?
 594                                 value.indexOf(check) >= 0 :
 595                                 type === "~=" ?
 596                                 (" " + value + " ").indexOf(check) >= 0 :
 597                                 !check ?
 598                                 value && result !== false :
 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 var origPOS = Expr.match.POS;
 620
 621 for ( var type in Expr.match ) {
 622         Expr.match[ type ] = RegExp( Expr.match[ type ].source + /(?![^\[]*\])(?![^\(]*\))/.source );
 623 }
 624
 625 var makeArray = function(array, results) {
 626         array = Array.prototype.slice.call( array );
 627
 628         if ( results ) {
 629                 results.push.apply( results, array );
 630                 return results;
 631         }
 632
 633         return array;
 634 };
 635
 636 // Perform a simple check to determine if the browser is capable of
 637 // converting a NodeList to an array using builtin methods.
 638 try {
 639         Array.prototype.slice.call( document.documentElement.childNodes );
 640
 641 // Provide a fallback method if it does not work
 642 } catch(e){
 643         makeArray = function(array, results) {
 644                 var ret = results || [];
 645
 646                 if ( toString.call(array) === "[object Array]" ) {
 647                         Array.prototype.push.apply( ret, array );
 648                 } else {
 649                         if ( typeof array.length === "number" ) {
 650                                 for ( var i = 0, l = array.length; i < l; i++ ) {
 651                                         ret.push( array[i] );
 652                                 }
 653                         } else {
 654                                 for ( var i = 0; array[i]; i++ ) {
 655                                         ret.push( array[i] );
 656                                 }
 657                         }
 658                 }
 659
 660                 return ret;
 661         };
 662 }
 663
 664 var sortOrder;
 665
 666 if ( document.documentElement.compareDocumentPosition ) {
 667         sortOrder = function( a, b ) {
 668                 var ret = a.compareDocumentPosition(b) & 4 ? -1 : a === b ? 0 : 1;
 669                 if ( ret === 0 ) {
 670                         hasDuplicate = true;
 671                 }
 672                 return ret;
 673         };
 674 } else if ( document.documentElement.sourceIndex === 1 ) {
 675         sortOrder = function( a, b ) {
 676                 var ret = a.sourceIndex - b.sourceIndex;
 677                 if ( ret === 0 ) {
 678                         hasDuplicate = true;
 679                 }
 680                 return ret;
 681         };
 682 } else if ( Array.prototype.indexOf ) {
 683         var indexOf = Array.prototype.indexOf,
 684                 allSort = document.getElementsByTagName("*");
 685
 686         sortOrder = function( a, b ) {
 687                 var ret = indexOf.call( allSort, a ) - indexOf.call( allSort, b );
 688                 if ( ret === 0 ) {
 689                         hasDuplicate = true;
 690                 }
 691                 return ret;
 692         };
 693 }
 694
 695 // Check to see if the browser returns elements by name when
 696 // querying by getElementById (and provide a workaround)
 697 (function(){
 698         // We're going to inject a fake input element with a specified name
 699         var form = document.createElement("form"),
 700                 id = "script" + (new Date).getTime();
 701         form.innerHTML = "<input name='" + id + "'/>";
 702
 703         // Inject it into the root element, check its status, and remove it quickly
 704         var root = document.documentElement;
 705         root.insertBefore( form, root.firstChild );
 706
 707         // The workaround has to do additional checks after a getElementById
 708         // Which slows things down for other browsers (hence the branching)
 709         if ( !!document.getElementById( id ) ) {
 710                 Expr.find.ID = function(match, context, isXML){
 711                         if ( typeof context.getElementById !== "undefined" && !isXML ) {
 712                                 var m = context.getElementById(match[1]);
 713                                 return m ? m.id === match[1] || typeof m.getAttributeNode !== "undefined" && m.getAttributeNode("id").nodeValue === match[1] ? [m] : undefined : [];
 714                         }
 715                 };
 716
 717                 Expr.filter.ID = function(elem, match){
 718                         var node = typeof elem.getAttributeNode !== "undefined" && elem.getAttributeNode("id");
 719                         return elem.nodeType === 1 && node && node.nodeValue === match;
 720                 };
 721         }
 722
 723         root.removeChild( form );
 724 })();
 725
 726 (function(){
 727         // Check to see if the browser returns only elements
 728         // when doing getElementsByTagName("*")
 729
 730         // Create a fake element
 731         var div = document.createElement("div");
 732         div.appendChild( document.createComment("") );
 733
 734         // Make sure no comments are found
 735         if ( div.getElementsByTagName("*").length > 0 ) {
 736                 Expr.find.TAG = function(match, context){
 737                         var results = context.getElementsByTagName(match[1]);
 738
 739                         // Filter out possible comments
 740                         if ( match[1] === "*" ) {
 741                                 var tmp = [];
 742
 743                                 for ( var i = 0; results[i]; i++ ) {
 744                                         if ( results[i].nodeType === 1 ) {
 745                                                 tmp.push( results[i] );
 746                                         }
 747                                 }
 748
 749                                 results = tmp;
 750                         }
 751
 752                         return results;
 753                 };
 754         }
 755
 756         // Check to see if an attribute returns normalized href attributes
 757         div.innerHTML = "<a href='#'></a>";
 758         if ( div.firstChild && typeof div.firstChild.getAttribute !== "undefined" &&
 759                         div.firstChild.getAttribute("href") !== "#" ) {
 760                 Expr.attrHandle.href = function(elem){
 761                         return elem.getAttribute("href", 2);
 762                 };
 763         }
 764 })();
 765
 766 if ( document.querySelectorAll ) (function(){
 767         var oldSizzle = Sizzle, div = document.createElement("div");
 768         div.innerHTML = "<p class='TEST'></p>";
 769
 770         // Safari can't handle uppercase or unicode characters when
 771         // in quirks mode.
 772         if ( div.querySelectorAll && div.querySelectorAll(".TEST").length === 0 ) {
 773                 return;
 774         }
 775
 776         Sizzle = function(query, context, extra, seed){
 777                 context = context || document;
 778
 779                 // Only use querySelectorAll on non-XML documents
 780                 // (ID selectors don't work in non-HTML documents)
 781                 if ( !seed && context.nodeType === 9 && !isXML(context) ) {
 782                         try {
 783                                 return makeArray( context.querySelectorAll(query), extra );
 784                         } catch(e){}
 785                 }
 786
 787                 return oldSizzle(query, context, extra, seed);
 788         };
 789
 790         Sizzle.find = oldSizzle.find;
 791         Sizzle.filter = oldSizzle.filter;
 792         Sizzle.selectors = oldSizzle.selectors;
 793         Sizzle.matches = oldSizzle.matches;
 794 })();
 795
 796 if ( document.getElementsByClassName && document.documentElement.getElementsByClassName ) (function(){
 797         var div = document.createElement("div");
 798         div.innerHTML = "<div class='test e'></div><div class='test'></div>";
 799
 800         // Opera can't find a second classname (in 9.6)
 801         if ( div.getElementsByClassName("e").length === 0 )
 802                 return;
 803
 804         // Safari caches class attributes, doesn't catch changes (in 3.2)
 805         div.lastChild.className = "e";
 806
 807         if ( div.getElementsByClassName("e").length === 1 )
 808                 return;
 809
 810         Expr.order.splice(1, 0, "CLASS");
 811         Expr.find.CLASS = function(match, context) {
 812                 return context.getElementsByClassName(match[1]);
 813         };
 814 })();
 815
 816 function dirNodeCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
 817         var sibDir = dir == "previousSibling" && !isXML;
 818         for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 819                 var elem = checkSet[i];
 820                 if ( elem ) {
 821                         if ( sibDir && elem.nodeType === 1 ){
 822                                 elem.sizcache = doneName;
 823                                 elem.sizset = i;
 824                         }
 825                         elem = elem[dir];
 826                         var match = false;
 827
 828                         while ( elem ) {
 829                                 if ( elem.sizcache === doneName ) {
 830                                         match = checkSet[elem.sizset];
 831                                         break;
 832                                 }
 833
 834                                 if ( elem.nodeType === 1 && !isXML ){
 835                                         elem.sizcache = doneName;
 836                                         elem.sizset = i;
 837                                 }
 838
 839                                 if ( elem.nodeName === cur ) {
 840                                         match = elem;
 841                                         break;
 842                                 }
 843
 844                                 elem = elem[dir];
 845                         }
 846
 847                         checkSet[i] = match;
 848                 }
 849         }
 850 }
 851
 852 function dirCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
 853         var sibDir = dir == "previousSibling" && !isXML;
 854         for ( var i = 0, l = checkSet.length; i < l; i++ ) {
 855                 var elem = checkSet[i];
 856                 if ( elem ) {
 857                         if ( sibDir && elem.nodeType === 1 ) {
 858                                 elem.sizcache = doneName;
 859                                 elem.sizset = i;
 860                         }
 861                         elem = elem[dir];
 862                         var match = false;
 863
 864                         while ( elem ) {
 865                                 if ( elem.sizcache === doneName ) {
 866                                         match = checkSet[elem.sizset];
 867                                         break;
 868                                 }
 869
 870                                 if ( elem.nodeType === 1 ) {
 871                                         if ( !isXML ) {
 872                                                 elem.sizcache = doneName;
 873                                                 elem.sizset = i;
 874                                         }
 875                                         if ( typeof cur !== "string" ) {
 876                                                 if ( elem === cur ) {
 877                                                         match = true;
 878                                                         break;
 879                                                 }
 880
 881                                         } else if ( Sizzle.filter( cur, [elem] ).length > 0 ) {
 882                                                 match = elem;
 883                                                 break;
 884                                         }
 885                                 }
 886
 887                                 elem = elem[dir];
 888                         }
 889
 890                         checkSet[i] = match;
 891                 }
 892         }
 893 }
 894
 895 var contains = document.compareDocumentPosition ?  function(a, b){
 896         return a.compareDocumentPosition(b) & 16;
 897 } : function(a, b){
 898         return a !== b && (a.contains ? a.contains(b) : true);
 899 };
 900
 901 var isXML = function(elem){
 902         return elem.nodeType === 9 && elem.documentElement.nodeName !== "HTML" ||
 903                 !!elem.ownerDocument && isXML( elem.ownerDocument );
 904 };
 905
 906 var posProcess = function(selector, context){
 907         var tmpSet = [], later = "", match,
 908                 root = context.nodeType ? [context] : context;
 909
 910         // Position selectors must be done after the filter
 911         // And so must :not(positional) so we move all PSEUDOs to the end
 912         while ( (match = Expr.match.PSEUDO.exec( selector )) ) {
 913                 later += match[0];
 914                 selector = selector.replace( Expr.match.PSEUDO, "" );
 915         }
 916
 917         selector = Expr.relative[selector] ? selector + "*" : selector;
 918
 919         for ( var i = 0, l = root.length; i < l; i++ ) {
 920                 Sizzle( selector, root[i], tmpSet );
 921         }
 922
 923         return Sizzle.filter( later, tmpSet );
 924 };
 925
 926 // EXPOSE
 927 jQuery.find = Sizzle;
 928 jQuery.filter = Sizzle.filter;
 929 jQuery.expr = Sizzle.selectors;
 930 jQuery.expr[":"] = jQuery.expr.filters;
 931
 932 Sizzle.selectors.filters.hidden = function(elem){
 933         return "hidden" === elem.type ||
 934                 jQuery.css(elem, "display") === "none" ||
 935                 jQuery.css(elem, "visibility") === "hidden";
 936 };
 937
 938 Sizzle.selectors.filters.visible = function(elem){
 939         return "hidden" !== elem.type &&
 940                 jQuery.css(elem, "display") !== "none" &&
 941                 jQuery.css(elem, "visibility") !== "hidden";
 942 };
 943
 944 Sizzle.selectors.filters.animated = function(elem){
 945         return jQuery.grep(jQuery.timers, function(fn){
 946                 return elem === fn.elem;
 947         }).length;
 948 };
 949
 950 jQuery.multiFilter = function( expr, elems, not ) {
 951         if ( not ) {
 952                 expr = ":not(" + expr + ")";
 953         }
 954
 955         return Sizzle.matches(expr, elems);
 956 };
 957
 958 jQuery.dir = function( elem, dir ){
 959         var matched = [], cur = elem[dir];
 960         while ( cur && cur != document ) {
 961                 if ( cur.nodeType == 1 )
 962                         matched.push( cur );
 963                 cur = cur[dir];
 964         }
 965         return matched;
 966 };
 967
 968 jQuery.nth = function(cur, result, dir, elem){
 969         result = result || 1;
 970         var num = 0;
 971
 972         for ( ; cur; cur = cur[dir] )
 973                 if ( cur.nodeType == 1 && ++num == result )
 974                         break;
 975
 976         return cur;
 977 };
 978
 979 jQuery.sibling = function(n, elem){
 980         var r = [];
 981
 982         for ( ; n; n = n.nextSibling ) {
 983                 if ( n.nodeType == 1 && n != elem )
 984                         r.push( n );
 985         }
 986
 987         return r;
 988 };
 989
 990 return;
 991
 992 window.Sizzle = Sizzle;
 993
 994 })();