jquery/src/selector.js

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/*!
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* Sizzle CSS Selector Engine - v1.0
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* Copyright 2009, The Dojo Foundation
* Released under the MIT, BSD, and GPL Licenses.
* More information: http://sizzlejs.com/
*/
(function(){
var chunker = /((?:\((?:\([^()]+\)|[^()]+)+\)|\[(?:\[[^[\]]*\]|['"][^'"]*['"]|[^[\]'"]+)+\]|\\.|[^ >+~,(\[\\]+)+|[>+~])(\s*,\s*)?/g,
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done = 0,
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toString = Object.prototype.toString,
hasDuplicate = false;
var Sizzle = function(selector, context, results, seed) {
results = results || [];
var origContext = context = context || document;
if ( context.nodeType !== 1 && context.nodeType !== 9 ) {
return [];
}
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if ( !selector || typeof selector !== "string" ) {
return results;
}
var parts = [], m, set, checkSet, check, mode, extra, prune = true, contextXML = isXML(context);
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// Reset the position of the chunker regexp (start from head)
chunker.lastIndex = 0;
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while ( (m = chunker.exec(selector)) !== null ) {
parts.push( m[1] );
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if ( m[2] ) {
extra = RegExp.rightContext;
break;
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}
}
if ( parts.length > 1 && origPOS.exec( selector ) ) {
if ( parts.length === 2 && Expr.relative[ parts[0] ] ) {
set = posProcess( parts[0] + parts[1], context );
} else {
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set = Expr.relative[ parts[0] ] ?
[ context ] :
Sizzle( parts.shift(), context );
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while ( parts.length ) {
selector = parts.shift();
if ( Expr.relative[ selector ] )
selector += parts.shift();
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set = posProcess( selector, set );
}
}
} else {
// Take a shortcut and set the context if the root selector is an ID
// (but not if it'll be faster if the inner selector is an ID)
if ( !seed && parts.length > 1 && context.nodeType === 9 && !contextXML &&
Expr.match.ID.test(parts[0]) && !Expr.match.ID.test(parts[parts.length - 1]) ) {
var ret = Sizzle.find( parts.shift(), context, contextXML );
context = ret.expr ? Sizzle.filter( ret.expr, ret.set )[0] : ret.set[0];
}
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if ( context ) {
var ret = seed ?
{ expr: parts.pop(), set: makeArray(seed) } :
Sizzle.find( parts.pop(), parts.length === 1 && (parts[0] === "~" || parts[0] === "+") && context.parentNode ? context.parentNode : context, contextXML );
set = ret.expr ? Sizzle.filter( ret.expr, ret.set ) : ret.set;
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if ( parts.length > 0 ) {
checkSet = makeArray(set);
} else {
prune = false;
}
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while ( parts.length ) {
var cur = parts.pop(), pop = cur;
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if ( !Expr.relative[ cur ] ) {
cur = "";
} else {
pop = parts.pop();
}
if ( pop == null ) {
pop = context;
}
Expr.relative[ cur ]( checkSet, pop, contextXML );
}
} else {
checkSet = parts = [];
}
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}
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if ( !checkSet ) {
checkSet = set;
}
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if ( !checkSet ) {
throw "Syntax error, unrecognized expression: " + (cur || selector);
}
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if ( toString.call(checkSet) === "[object Array]" ) {
if ( !prune ) {
results.push.apply( results, checkSet );
} else if ( context && context.nodeType === 1 ) {
for ( var i = 0; checkSet[i] != null; i++ ) {
if ( checkSet[i] && (checkSet[i] === true || checkSet[i].nodeType === 1 && contains(context, checkSet[i])) ) {
results.push( set[i] );
}
}
} else {
for ( var i = 0; checkSet[i] != null; i++ ) {
if ( checkSet[i] && checkSet[i].nodeType === 1 ) {
results.push( set[i] );
}
}
}
} else {
makeArray( checkSet, results );
}
if ( extra ) {
Sizzle( extra, origContext, results, seed );
Sizzle.uniqueSort( results );
}
return results;
};
Sizzle.uniqueSort = function(results){
if ( sortOrder ) {
hasDuplicate = false;
results.sort(sortOrder);
if ( hasDuplicate ) {
for ( var i = 1; i < results.length; i++ ) {
if ( results[i] === results[i-1] ) {
results.splice(i--, 1);
}
}
}
}
};
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Sizzle.matches = function(expr, set){
return Sizzle(expr, null, null, set);
};
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Sizzle.find = function(expr, context, isXML){
var set, match;
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if ( !expr ) {
return [];
}
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for ( var i = 0, l = Expr.order.length; i < l; i++ ) {
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var type = Expr.order[i], match;
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if ( (match = Expr.match[ type ].exec( expr )) ) {
var left = RegExp.leftContext;
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if ( left.substr( left.length - 1 ) !== "\\" ) {
match[1] = (match[1] || "").replace(/\\/g, "");
set = Expr.find[ type ]( match, context, isXML );
if ( set != null ) {
expr = expr.replace( Expr.match[ type ], "" );
break;
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}
}
}
}
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if ( !set ) {
set = context.getElementsByTagName("*");
}
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return {set: set, expr: expr};
};
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Sizzle.filter = function(expr, set, inplace, not){
var old = expr, result = [], curLoop = set, match, anyFound,
isXMLFilter = set && set[0] && isXML(set[0]);
while ( expr && set.length ) {
for ( var type in Expr.filter ) {
if ( (match = Expr.match[ type ].exec( expr )) != null ) {
var filter = Expr.filter[ type ], found, item;
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anyFound = false;
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if ( curLoop == result ) {
result = [];
}
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if ( Expr.preFilter[ type ] ) {
match = Expr.preFilter[ type ]( match, curLoop, inplace, result, not, isXMLFilter );
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if ( !match ) {
anyFound = found = true;
} else if ( match === true ) {
continue;
}
}
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if ( match ) {
for ( var i = 0; (item = curLoop[i]) != null; i++ ) {
if ( item ) {
found = filter( item, match, i, curLoop );
var pass = not ^ !!found;
if ( inplace && found != null ) {
if ( pass ) {
anyFound = true;
} else {
curLoop[i] = false;
}
} else if ( pass ) {
result.push( item );
anyFound = true;
}
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}
}
}
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if ( found !== undefined ) {
if ( !inplace ) {
curLoop = result;
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}
expr = expr.replace( Expr.match[ type ], "" );
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if ( !anyFound ) {
return [];
}
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break;
}
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}
}
// Improper expression
if ( expr == old ) {
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if ( anyFound == null ) {
throw "Syntax error, unrecognized expression: " + expr;
} else {
break;
}
}
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old = expr;
}
return curLoop;
};
var Expr = Sizzle.selectors = {
order: [ "ID", "NAME", "TAG" ],
match: {
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ID: /#((?:[\w\u00c0-\uFFFF_-]|\\.)+)/,
CLASS: /\.((?:[\w\u00c0-\uFFFF_-]|\\.)+)/,
NAME: /\[name=['"]*((?:[\w\u00c0-\uFFFF_-]|\\.)+)['"]*\]/,
ATTR: /\[\s*((?:[\w\u00c0-\uFFFF_-]|\\.)+)\s*(?:(\S?=)\s*(['"]*)(.*?)\3|)\s*\]/,
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TAG: /^((?:[\w\u00c0-\uFFFF\*_-]|\\.)+)/,
CHILD: /:(only|nth|last|first)-child(?:\((even|odd|[\dn+-]*)\))?/,
POS: /:(nth|eq|gt|lt|first|last|even|odd)(?:\((\d*)\))?(?=[^-]|$)/,
PSEUDO: /:((?:[\w\u00c0-\uFFFF_-]|\\.)+)(?:\((['"]*)((?:\([^\)]+\)|[^\2\(\)]*)+)\2\))?/
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},
attrMap: {
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"class": "className",
"for": "htmlFor"
},
attrHandle: {
href: function(elem){
return elem.getAttribute("href");
}
},
relative: {
"+": function(checkSet, part, isXML){
var isPartStr = typeof part === "string",
isTag = isPartStr && !/\W/.test(part),
isPartStrNotTag = isPartStr && !isTag;
if ( isTag && !isXML ) {
part = part.toUpperCase();
}
for ( var i = 0, l = checkSet.length, elem; i < l; i++ ) {
if ( (elem = checkSet[i]) ) {
while ( (elem = elem.previousSibling) && elem.nodeType !== 1 ) {}
checkSet[i] = isPartStrNotTag || elem && elem.nodeName === part ?
elem || false :
elem === part;
}
}
if ( isPartStrNotTag ) {
Sizzle.filter( part, checkSet, true );
}
},
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">": function(checkSet, part, isXML){
var isPartStr = typeof part === "string";
if ( isPartStr && !/\W/.test(part) ) {
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part = isXML ? part : part.toUpperCase();
for ( var i = 0, l = checkSet.length; i < l; i++ ) {
var elem = checkSet[i];
if ( elem ) {
var parent = elem.parentNode;
checkSet[i] = parent.nodeName === part ? parent : false;
}
}
} else {
for ( var i = 0, l = checkSet.length; i < l; i++ ) {
var elem = checkSet[i];
if ( elem ) {
checkSet[i] = isPartStr ?
elem.parentNode :
elem.parentNode === part;
}
}
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if ( isPartStr ) {
Sizzle.filter( part, checkSet, true );
}
}
},
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"": function(checkSet, part, isXML){
var doneName = done++, checkFn = dirCheck;
if ( !part.match(/\W/) ) {
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var nodeCheck = part = isXML ? part : part.toUpperCase();
checkFn = dirNodeCheck;
}
checkFn("parentNode", part, doneName, checkSet, nodeCheck, isXML);
},
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"~": function(checkSet, part, isXML){
var doneName = done++, checkFn = dirCheck;
if ( typeof part === "string" && !part.match(/\W/) ) {
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var nodeCheck = part = isXML ? part : part.toUpperCase();
checkFn = dirNodeCheck;
}
checkFn("previousSibling", part, doneName, checkSet, nodeCheck, isXML);
}
},
find: {
ID: function(match, context, isXML){
if ( typeof context.getElementById !== "undefined" && !isXML ) {
var m = context.getElementById(match[1]);
return m ? [m] : [];
}
},
NAME: function(match, context, isXML){
if ( typeof context.getElementsByName !== "undefined" ) {
var ret = [], results = context.getElementsByName(match[1]);
for ( var i = 0, l = results.length; i < l; i++ ) {
if ( results[i].getAttribute("name") === match[1] ) {
ret.push( results[i] );
}
}
return ret.length === 0 ? null : ret;
}
},
TAG: function(match, context){
return context.getElementsByTagName(match[1]);
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}
},
preFilter: {
CLASS: function(match, curLoop, inplace, result, not, isXML){
match = " " + match[1].replace(/\\/g, "") + " ";
if ( isXML ) {
return match;
}
for ( var i = 0, elem; (elem = curLoop[i]) != null; i++ ) {
if ( elem ) {
if ( not ^ (elem.className && (" " + elem.className + " ").indexOf(match) >= 0) ) {
if ( !inplace )
result.push( elem );
} else if ( inplace ) {
curLoop[i] = false;
}
}
}
return false;
},
ID: function(match){
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return match[1].replace(/\\/g, "");
},
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TAG: function(match, curLoop){
for ( var i = 0; curLoop[i] === false; i++ ){}
return curLoop[i] && isXML(curLoop[i]) ? match[1] : match[1].toUpperCase();
},
CHILD: function(match){
if ( match[1] == "nth" ) {
// parse equations like 'even', 'odd', '5', '2n', '3n+2', '4n-1', '-n+6'
var test = /(-?)(\d*)n((?:\+|-)?\d*)/.exec(
match[2] == "even" && "2n" || match[2] == "odd" && "2n+1" ||
!/\D/.test( match[2] ) && "0n+" + match[2] || match[2]);
// calculate the numbers (first)n+(last) including if they are negative
match[2] = (test[1] + (test[2] || 1)) - 0;
match[3] = test[3] - 0;
}
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// TODO: Move to normal caching system
match[0] = done++;
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return match;
},
ATTR: function(match, curLoop, inplace, result, not, isXML){
var name = match[1].replace(/\\/g, "");
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if ( !isXML && Expr.attrMap[name] ) {
match[1] = Expr.attrMap[name];
}
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if ( match[2] === "~=" ) {
match[4] = " " + match[4] + " ";
}
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return match;
},
PSEUDO: function(match, curLoop, inplace, result, not){
if ( match[1] === "not" ) {
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// If we're dealing with a complex expression, or a simple one
if ( match[3].match(chunker).length > 1 || /^\w/.test(match[3]) ) {
match[3] = Sizzle(match[3], null, null, curLoop);
} else {
var ret = Sizzle.filter(match[3], curLoop, inplace, true ^ not);
if ( !inplace ) {
result.push.apply( result, ret );
}
return false;
}
} else if ( Expr.match.POS.test( match[0] ) || Expr.match.CHILD.test( match[0] ) ) {
return true;
}
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return match;
},
POS: function(match){
match.unshift( true );
return match;
}
},
filters: {
enabled: function(elem){
return elem.disabled === false && elem.type !== "hidden";
},
disabled: function(elem){
return elem.disabled === true;
},
checked: function(elem){
return elem.checked === true;
},
selected: function(elem){
// Accessing this property makes selected-by-default
// options in Safari work properly
elem.parentNode.selectedIndex;
return elem.selected === true;
},
parent: function(elem){
return !!elem.firstChild;
},
empty: function(elem){
return !elem.firstChild;
},
has: function(elem, i, match){
return !!Sizzle( match[3], elem ).length;
},
header: function(elem){
return /h\d/i.test( elem.nodeName );
},
text: function(elem){
return "text" === elem.type;
},
radio: function(elem){
return "radio" === elem.type;
},
checkbox: function(elem){
return "checkbox" === elem.type;
},
file: function(elem){
return "file" === elem.type;
},
password: function(elem){
return "password" === elem.type;
},
submit: function(elem){
return "submit" === elem.type;
},
image: function(elem){
return "image" === elem.type;
},
reset: function(elem){
return "reset" === elem.type;
},
button: function(elem){
return "button" === elem.type || elem.nodeName.toUpperCase() === "BUTTON";
},
input: function(elem){
return /input|select|textarea|button/i.test(elem.nodeName);
}
},
setFilters: {
first: function(elem, i){
return i === 0;
},
last: function(elem, i, match, array){
return i === array.length - 1;
},
even: function(elem, i){
return i % 2 === 0;
},
odd: function(elem, i){
return i % 2 === 1;
},
lt: function(elem, i, match){
return i < match[3] - 0;
},
gt: function(elem, i, match){
return i > match[3] - 0;
},
nth: function(elem, i, match){
return match[3] - 0 == i;
},
eq: function(elem, i, match){
return match[3] - 0 == i;
}
},
filter: {
PSEUDO: function(elem, match, i, array){
var name = match[1], filter = Expr.filters[ name ];
if ( filter ) {
return filter( elem, i, match, array );
} else if ( name === "contains" ) {
return (elem.textContent || elem.innerText || "").indexOf(match[3]) >= 0;
} else if ( name === "not" ) {
var not = match[3];
for ( var i = 0, l = not.length; i < l; i++ ) {
if ( not[i] === elem ) {
return false;
}
}
return true;
}
},
CHILD: function(elem, match){
var type = match[1], node = elem;
switch (type) {
case 'only':
case 'first':
while (node = node.previousSibling) {
if ( node.nodeType === 1 ) return false;
}
if ( type == 'first') return true;
node = elem;
case 'last':
while (node = node.nextSibling) {
if ( node.nodeType === 1 ) return false;
}
return true;
case 'nth':
var first = match[2], last = match[3];
if ( first == 1 && last == 0 ) {
return true;
}
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var doneName = match[0],
parent = elem.parentNode;
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if ( parent && (parent.sizcache !== doneName || !elem.nodeIndex) ) {
var count = 0;
for ( node = parent.firstChild; node; node = node.nextSibling ) {
if ( node.nodeType === 1 ) {
node.nodeIndex = ++count;
}
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}
parent.sizcache = doneName;
}
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var diff = elem.nodeIndex - last;
if ( first == 0 ) {
return diff == 0;
} else {
return ( diff % first == 0 && diff / first >= 0 );
}
}
},
ID: function(elem, match){
return elem.nodeType === 1 && elem.getAttribute("id") === match;
},
TAG: function(elem, match){
return (match === "*" && elem.nodeType === 1) || elem.nodeName === match;
},
CLASS: function(elem, match){
return (" " + (elem.className || elem.getAttribute("class")) + " ")
.indexOf( match ) > -1;
},
ATTR: function(elem, match){
var name = match[1],
result = Expr.attrHandle[ name ] ?
Expr.attrHandle[ name ]( elem ) :
elem[ name ] != null ?
elem[ name ] :
elem.getAttribute( name ),
value = result + "",
type = match[2],
check = match[4];
return result == null ?
type === "!=" :
type === "=" ?
value === check :
type === "*=" ?
value.indexOf(check) >= 0 :
type === "~=" ?
(" " + value + " ").indexOf(check) >= 0 :
!check ?
value && result !== false :
type === "!=" ?
value != check :
type === "^=" ?
value.indexOf(check) === 0 :
type === "$=" ?
value.substr(value.length - check.length) === check :
type === "|=" ?
value === check || value.substr(0, check.length + 1) === check + "-" :
false;
},
POS: function(elem, match, i, array){
var name = match[2], filter = Expr.setFilters[ name ];
if ( filter ) {
return filter( elem, i, match, array );
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}
}
}
};
var origPOS = Expr.match.POS;
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for ( var type in Expr.match ) {
Expr.match[ type ] = new RegExp( Expr.match[ type ].source + /(?![^\[]*\])(?![^\(]*\))/.source );
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}
var makeArray = function(array, results) {
array = Array.prototype.slice.call( array );
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if ( results ) {
results.push.apply( results, array );
return results;
}
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return array;
};
// Perform a simple check to determine if the browser is capable of
// converting a NodeList to an array using builtin methods.
try {
Array.prototype.slice.call( document.documentElement.childNodes );
// Provide a fallback method if it does not work
} catch(e){
makeArray = function(array, results) {
var ret = results || [];
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if ( toString.call(array) === "[object Array]" ) {
Array.prototype.push.apply( ret, array );
} else {
if ( typeof array.length === "number" ) {
for ( var i = 0, l = array.length; i < l; i++ ) {
ret.push( array[i] );
}
} else {
for ( var i = 0; array[i]; i++ ) {
ret.push( array[i] );
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}
}
}
return ret;
};
}
var sortOrder;
if ( document.documentElement.compareDocumentPosition ) {
sortOrder = function( a, b ) {
var ret = a.compareDocumentPosition(b) & 4 ? -1 : a === b ? 0 : 1;
if ( ret === 0 ) {
hasDuplicate = true;
}
return ret;
};
} else if ( "sourceIndex" in document.documentElement ) {
sortOrder = function( a, b ) {
var ret = a.sourceIndex - b.sourceIndex;
if ( ret === 0 ) {
hasDuplicate = true;
}
return ret;
};
} else if ( document.createRange ) {
sortOrder = function( a, b ) {
var aRange = a.ownerDocument.createRange(), bRange = b.ownerDocument.createRange();
aRange.selectNode(a);
aRange.collapse(true);
bRange.selectNode(b);
bRange.collapse(true);
var ret = aRange.compareBoundaryPoints(Range.START_TO_END, bRange);
if ( ret === 0 ) {
hasDuplicate = true;
}
return ret;
};
}
// Check to see if the browser returns elements by name when
// querying by getElementById (and provide a workaround)
(function(){
// We're going to inject a fake input element with a specified name
var form = document.createElement("div"),
id = "script" + (new Date).getTime();
form.innerHTML = "<a name='" + id + "'/>";
// Inject it into the root element, check its status, and remove it quickly
var root = document.documentElement;
root.insertBefore( form, root.firstChild );
// The workaround has to do additional checks after a getElementById
// Which slows things down for other browsers (hence the branching)
if ( !!document.getElementById( id ) ) {
Expr.find.ID = function(match, context, isXML){
if ( typeof context.getElementById !== "undefined" && !isXML ) {
var m = context.getElementById(match[1]);
return m ? m.id === match[1] || typeof m.getAttributeNode !== "undefined" && m.getAttributeNode("id").nodeValue === match[1] ? [m] : undefined : [];
}
};
Expr.filter.ID = function(elem, match){
var node = typeof elem.getAttributeNode !== "undefined" && elem.getAttributeNode("id");
return elem.nodeType === 1 && node && node.nodeValue === match;
};
}
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root.removeChild( form );
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root = form = null; // release memory in IE
})();
(function(){
// Check to see if the browser returns only elements
// when doing getElementsByTagName("*")
// Create a fake element
var div = document.createElement("div");
div.appendChild( document.createComment("") );
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// Make sure no comments are found
if ( div.getElementsByTagName("*").length > 0 ) {
Expr.find.TAG = function(match, context){
var results = context.getElementsByTagName(match[1]);
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// Filter out possible comments
if ( match[1] === "*" ) {
var tmp = [];
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for ( var i = 0; results[i]; i++ ) {
if ( results[i].nodeType === 1 ) {
tmp.push( results[i] );
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}
}
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results = tmp;
}
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return results;
};
}
// Check to see if an attribute returns normalized href attributes
div.innerHTML = "<a href='#'></a>";
if ( div.firstChild && typeof div.firstChild.getAttribute !== "undefined" &&
div.firstChild.getAttribute("href") !== "#" ) {
Expr.attrHandle.href = function(elem){
return elem.getAttribute("href", 2);
};
}
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div = null; // release memory in IE
})();
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if ( document.querySelectorAll ) (function(){
var oldSizzle = Sizzle, div = document.createElement("div");
div.innerHTML = "<p class='TEST'></p>";
// Safari can't handle uppercase or unicode characters when
// in quirks mode.
if ( div.querySelectorAll && div.querySelectorAll(".TEST").length === 0 ) {
return;
}
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Sizzle = function(query, context, extra, seed){
context = context || document;
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// Only use querySelectorAll on non-XML documents
// (ID selectors don't work in non-HTML documents)
if ( !seed && context.nodeType === 9 && !isXML(context) ) {
try {
return makeArray( context.querySelectorAll(query), extra );
} catch(e){}
}
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return oldSizzle(query, context, extra, seed);
};
for ( var prop in oldSizzle ) {
Sizzle[ prop ] = oldSizzle[ prop ];
}
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div = null; // release memory in IE
})();
if ( document.getElementsByClassName && document.documentElement.getElementsByClassName ) (function(){
var div = document.createElement("div");
div.innerHTML = "<div class='test e'></div><div class='test'></div>";
// Opera can't find a second classname (in 9.6)
if ( div.getElementsByClassName("e").length === 0 )
return;
// Safari caches class attributes, doesn't catch changes (in 3.2)
div.lastChild.className = "e";
if ( div.getElementsByClassName("e").length === 1 )
return;
Expr.order.splice(1, 0, "CLASS");
Expr.find.CLASS = function(match, context, isXML) {
if ( typeof context.getElementsByClassName !== "undefined" && !isXML ) {
return context.getElementsByClassName(match[1]);
}
};
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div = null; // release memory in IE
})();
function dirNodeCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
var sibDir = dir == "previousSibling" && !isXML;
for ( var i = 0, l = checkSet.length; i < l; i++ ) {
var elem = checkSet[i];
if ( elem ) {
if ( sibDir && elem.nodeType === 1 ){
elem.sizcache = doneName;
elem.sizset = i;
}
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elem = elem[dir];
var match = false;
while ( elem ) {
if ( elem.sizcache === doneName ) {
match = checkSet[elem.sizset];
break;
}
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if ( elem.nodeType === 1 && !isXML ){
elem.sizcache = doneName;
elem.sizset = i;
}
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if ( elem.nodeName === cur ) {
match = elem;
break;
}
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elem = elem[dir];
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}
checkSet[i] = match;
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}
}
}
function dirCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
var sibDir = dir == "previousSibling" && !isXML;
for ( var i = 0, l = checkSet.length; i < l; i++ ) {
var elem = checkSet[i];
if ( elem ) {
if ( sibDir && elem.nodeType === 1 ) {
elem.sizcache = doneName;
elem.sizset = i;
}
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elem = elem[dir];
var match = false;
while ( elem ) {
if ( elem.sizcache === doneName ) {
match = checkSet[elem.sizset];
break;
}
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if ( elem.nodeType === 1 ) {
if ( !isXML ) {
elem.sizcache = doneName;
elem.sizset = i;
}
if ( typeof cur !== "string" ) {
if ( elem === cur ) {
match = true;
break;
}
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} else if ( Sizzle.filter( cur, [elem] ).length > 0 ) {
match = elem;
break;
}
}
elem = elem[dir];
}
checkSet[i] = match;
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}
}
}
var contains = document.compareDocumentPosition ? function(a, b){
return a.compareDocumentPosition(b) & 16;
} : function(a, b){
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return a !== b && (a.contains ? a.contains(b) : true);
};
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var isXML = function(elem){
return elem.nodeType === 9 && elem.documentElement.nodeName !== "HTML" ||
!!elem.ownerDocument && elem.ownerDocument.documentElement.nodeName !== "HTML";
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};
var posProcess = function(selector, context){
var tmpSet = [], later = "", match,
root = context.nodeType ? [context] : context;
// Position selectors must be done after the filter
// And so must :not(positional) so we move all PSEUDOs to the end
while ( (match = Expr.match.PSEUDO.exec( selector )) ) {
later += match[0];
selector = selector.replace( Expr.match.PSEUDO, "" );
}
selector = Expr.relative[selector] ? selector + "*" : selector;
for ( var i = 0, l = root.length; i < l; i++ ) {
Sizzle( selector, root[i], tmpSet );
}
return Sizzle.filter( later, tmpSet );
};
// EXPOSE
jQuery.find = Sizzle;
jQuery.expr = Sizzle.selectors;
jQuery.expr[":"] = jQuery.expr.filters;
Sizzle.selectors.filters.hidden = function(elem){
return elem.offsetWidth === 0 && elem.offsetHeight === 0;
};
Sizzle.selectors.filters.visible = function(elem){
return elem.offsetWidth > 0 || elem.offsetHeight > 0;
};
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Sizzle.selectors.filters.animated = function(elem){
return jQuery.grep(jQuery.timers, function(fn){
return elem === fn.elem;
}).length;
};
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jQuery.filter = jQuery.multiFilter = function( expr, elems, not ) {
if ( not ) {
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expr = ":not(" + expr + ")";
}
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return Sizzle.matches(expr, elems);
};
jQuery.dir = function( elem, dir ){
var matched = [], cur = elem[dir];
while ( cur && cur != document ) {
if ( cur.nodeType == 1 )
matched.push( cur );
cur = cur[dir];
}
return matched;
};
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jQuery.nth = function(cur, result, dir, elem){
result = result || 1;
var num = 0;
for ( ; cur; cur = cur[dir] )
if ( cur.nodeType == 1 && ++num == result )
break;
return cur;
};
jQuery.sibling = function(n, elem){
var r = [];
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for ( ; n; n = n.nextSibling ) {
if ( n.nodeType == 1 && n != elem )
r.push( n );
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}
return r;
};
return;
window.Sizzle = Sizzle;
})();