12931         href: function(elem){  argument
12932             return elem.getAttribute("href");
12945             for ( var i = 0, l = checkSet.length, elem; i < l; i++ ) {
12946                 if ( (elem = checkSet[i]) ) {
12947                     while ( (elem = elem.previousSibling) && elem.nodeType !== 1 ) {}
12949                     checkSet[i] = isPartStrNotTag || elem && elem.nodeName === part ?
12950                         elem || false :
12951                         elem === part;
12966                     var elem = checkSet[i];
12967                     if ( elem ) {
12968                         var parent = elem.parentNode;
12974                     var elem = checkSet[i];
12975                     if ( elem ) {
12977                             elem.parentNode :
12978                             elem.parentNode === part;
13434         Expr.filter.ID = function(elem, match){  argument
13435             var node = typeof elem.getAttributeNode !== "undefined" && elem.getAttributeNode("id");
13436             return elem.nodeType === 1 && node && node.nodeValue === match;
13478         Expr.attrHandle.href = function(elem){  argument
13479             return elem.getAttribute("href", 2);
13544         var elem = checkSet[i];
13545         if ( elem ) {
13546             if ( sibDir && elem.nodeType === 1 ){
13547                 elem.sizcache = doneName;
13548                 elem.sizset = i;
13550             elem = elem[dir];
13553             while ( elem ) {
13554                 if ( elem.sizcache === doneName ) {
13555                     match = checkSet[elem.sizset];
13559                 if ( elem.nodeType === 1 && !isXML ){
13560                     elem.sizcache = doneName;
13561                     elem.sizset = i;
13564                 if ( elem.nodeName === cur ) {
13565                     match = elem;
13569                 elem = elem[dir];
13580         var elem = checkSet[i];
13581         if ( elem ) {
13582             if ( sibDir && elem.nodeType === 1 ) {
13583                 elem.sizcache = doneName;
13584                 elem.sizset = i;
13586             elem = elem[dir];
13589             while ( elem ) {
13590                 if ( elem.sizcache === doneName ) {
13591                     match = checkSet[elem.sizset];
13595                 if ( elem.nodeType === 1 ) {
13597                         elem.sizcache = doneName;
13598                         elem.sizset = i;
13601                         if ( elem === cur ) {
13606                     } else if ( Sizzle.filter( cur, [elem] ).length > 0 ) {
13607                         match = elem;
13612                 elem = elem[dir];
13626 var isXML = function(elem){  argument
13627     return elem.nodeType === 9 && elem.documentElement.nodeName !== "HTML" ||
13628         !!elem.ownerDocument && elem.ownerDocument.documentElement.nodeName !== "HTML";