/*!

* jQuery JavaScript Library v3.2.1

* https://jquery.com/

*

* Includes Sizzle.js

* https://sizzlejs.com/

*

* Copyright JS Foundation and other contributors

* Released under the MIT license

* https://jquery.org/license

*

* Date: 2017-03-20T18:59Z

*/

( function( global, factory ) {

"use strict";

if ( typeof module === "object" && typeof module.exports === "object" ) {

// For CommonJS and CommonJS-like environments where a proper `window`

// is present, execute the factory and get jQuery.

// For environments that do not have a `window` with a `document`

// (such as Node.js), expose a factory as module.exports.

// This accentuates the need for the creation of a real `window`.

// e.g. var jQuery = require("jquery")(window);

// See ticket #14549 for more info.

module.exports = global.document ?

factory( global, true ) :

function( w ) {

if ( !w.document ) {

throw new Error( "jQuery requires a window with a document" );

}

return factory( w );

};

} else {

factory( global );

}

// Pass this if window is not defined yet

} )( typeof window !== "undefined" ? window : this, function( window, noGlobal ) {

// Edge <= 12 - 13+, Firefox <=18 - 45+, IE 10 - 11, Safari 5.1 - 9+, iOS 6 - 9.1

// throw exceptions when non-strict code (e.g., ASP.NET 4.5) accesses strict mode

// arguments.callee.caller (trac-13335). But as of jQuery 3.0 (2016), strict mode should be common

// enough that all such attempts are guarded in a try block.

"use strict";

var arr = [];

var document = window.document;

var getProto = Object.getPrototypeOf;

var slice = arr.slice;

var concat = arr.concat;

var push = arr.push;

var indexOf = arr.indexOf;

var class2type = {};

var toString = class2type.toString;

var hasOwn = class2type.hasOwnProperty;

var fnToString = hasOwn.toString;

var ObjectFunctionString = fnToString.call( Object );

var support = {};

function DOMEval( code, doc ) {

doc = doc || document;

var script = doc.createElement( "script" );

script.text = code;

doc.head.appendChild( script ).parentNode.removeChild( script );

}

/* global Symbol */

// Defining this global in .eslintrc.json would create a danger of using the global

// unguarded in another place, it seems safer to define global only for this module

var

version = "3.2.1",

// Define a local copy of jQuery

jQuery = function( selector, context ) {

// The jQuery object is actually just the init constructor 'enhanced'

// Need init if jQuery is called (just allow error to be thrown if not included)

return new jQuery.fn.init( selector, context );

},

// Support: Android <=4.0 only

// Make sure we trim BOM and NBSP

rtrim = /^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g,

// Matches dashed string for camelizing

rmsPrefix = /^-ms-/,

rdashAlpha = /-([a-z])/g,

// Used by jQuery.camelCase as callback to replace()

fcamelCase = function( all, letter ) {

return letter.toUpperCase();

};

jQuery.fn = jQuery.prototype = {

// The current version of jQuery being used

jquery: version,

constructor: jQuery,

// The default length of a jQuery object is 0

length: 0,

toArray: function() {

return slice.call( this );

},

// Get the Nth element in the matched element set OR

// Get the whole matched element set as a clean array

get: function( num ) {

// Return all the elements in a clean array

if ( num == null ) {

return slice.call( this );

}

// Return just the one element from the set

return num < 0 ? this[ num + this.length ] : this[ num ];

},

// Take an array of elements and push it onto the stack

// (returning the new matched element set)

pushStack: function( elems ) {

// Build a new jQuery matched element set

var ret = jQuery.merge( this.constructor(), elems );

// Add the old object onto the stack (as a reference)

ret.prevObject = this;

// Return the newly-formed element set

return ret;

},

// Execute a callback for every element in the matched set.

each: function( callback ) {

return jQuery.each( this, callback );

},

map: function( callback ) {

return this.pushStack( jQuery.map( this, function( elem, i ) {

return callback.call( elem, i, elem );

} ) );

},

slice: function() {

return this.pushStack( slice.apply( this, arguments ) );

},

first: function() {

return this.eq( 0 );

},

last: function() {

return this.eq( -1 );

},

eq: function( i ) {

var len = this.length,

j = +i + ( i < 0 ? len : 0 );

return this.pushStack( j >= 0 && j < len ? [ this[ j ] ] : [] );

},

end: function() {

return this.prevObject || this.constructor();

},

// For internal use only.

// Behaves like an Array's method, not like a jQuery method.

push: push,

sort: arr.sort,

splice: arr.splice

};

jQuery.extend = jQuery.fn.extend = function() {

var options, name, src, copy, copyIsArray, clone,

target = arguments[ 0 ] || {},

i = 1,

length = arguments.length,

deep = false;

// Handle a deep copy situation

if ( typeof target === "boolean" ) {

deep = target;

// Skip the boolean and the target

target = arguments[ i ] || {};

i++;

}

// Handle case when target is a string or something (possible in deep copy)

if ( typeof target !== "object" && !jQuery.isFunction( target ) ) {

target = {};

}

// Extend jQuery itself if only one argument is passed

if ( i === length ) {

target = this;

i--;

}

for ( ; i < length; i++ ) {

// Only deal with non-null/undefined values

if ( ( options = arguments[ i ] ) != null ) {

// Extend the base object

for ( name in options ) {

src = target[ name ];

copy = options[ name ];

// Prevent never-ending loop

if ( target === copy ) {

continue;

}

// Recurse if we're merging plain objects or arrays

if ( deep && copy && ( jQuery.isPlainObject( copy ) ||

( copyIsArray = Array.isArray( copy ) ) ) ) {

if ( copyIsArray ) {

copyIsArray = false;

clone = src && Array.isArray( src ) ? src : [];

} else {

clone = src && jQuery.isPlainObject( src ) ? src : {};

}

// Never move original objects, clone them

target[ name ] = jQuery.extend( deep, clone, copy );

// Don't bring in undefined values

} else if ( copy !== undefined ) {

target[ name ] = copy;

}

}

}

}

// Return the modified object

return target;

};

jQuery.extend( {

// Unique for each copy of jQuery on the page

expando: "jQuery" + ( version + Math.random() ).replace( /\D/g, "" ),

// Assume jQuery is ready without the ready module

isReady: true,

error: function( msg ) {

throw new Error( msg );

},

noop: function() {},

isFunction: function( obj ) {

return jQuery.type( obj ) === "function";

},

isWindow: function( obj ) {

return obj != null && obj === obj.window;

},

isNumeric: function( obj ) {

// As of jQuery 3.0, isNumeric is limited to

// strings and numbers (primitives or objects)

// that can be coerced to finite numbers (gh-2662)

var type = jQuery.type( obj );

return ( type === "number" || type === "string" ) &&

// parseFloat NaNs numeric-cast false positives ("")

// ...but misinterprets leading-number strings, particularly hex literals ("0x...")

// subtraction forces infinities to NaN

!isNaN( obj - parseFloat( obj ) );

},

isPlainObject: function( obj ) {

var proto, Ctor;

// Detect obvious negatives

// Use toString instead of jQuery.type to catch host objects

if ( !obj || toString.call( obj ) !== "[object Object]" ) {

return false;

}

proto = getProto( obj );

// Objects with no prototype (e.g., `Object.create( null )`) are plain

if ( !proto ) {

return true;

}

// Objects with prototype are plain iff they were constructed by a global Object function

Ctor = hasOwn.call( proto, "constructor" ) && proto.constructor;

return typeof Ctor === "function" && fnToString.call( Ctor ) === ObjectFunctionString;

},

isEmptyObject: function( obj ) {

/* eslint-disable no-unused-vars */

// See https://github.com/eslint/eslint/issues/6125

var name;

for ( name in obj ) {

return false;

}

return true;

},

type: function( obj ) {

if ( obj == null ) {

return obj + "";

}

// Support: Android <=2.3 only (functionish RegExp)

return typeof obj === "object" || typeof obj === "function" ?

class2type[ toString.call( obj ) ] || "object" :

typeof obj;

},

// Evaluates a script in a global context

globalEval: function( code ) {

DOMEval( code );

},

// Convert dashed to camelCase; used by the css and data modules

// Support: IE <=9 - 11, Edge 12 - 13

// Microsoft forgot to hump their vendor prefix (#9572)

camelCase: function( string ) {

return string.replace( rmsPrefix, "ms-" ).replace( rdashAlpha, fcamelCase );

},

each: function( obj, callback ) {

var length, i = 0;

if ( isArrayLike( obj ) ) {

length = obj.length;

for ( ; i < length; i++ ) {

if ( callback.call( obj[ i ], i, obj[ i ] ) === false ) {

break;

}

}

} else {

for ( i in obj ) {

if ( callback.call( obj[ i ], i, obj[ i ] ) === false ) {

break;

}

}

}

return obj;

},

// Support: Android <=4.0 only

trim: function( text ) {

return text == null ?

"" :

( text + "" ).replace( rtrim, "" );

},

// results is for internal usage only

makeArray: function( arr, results ) {

var ret = results || [];

if ( arr != null ) {

if ( isArrayLike( Object( arr ) ) ) {

jQuery.merge( ret,

typeof arr === "string" ?

[ arr ] : arr

);

} else {

push.call( ret, arr );

}

}

return ret;

},

inArray: function( elem, arr, i ) {

return arr == null ? -1 : indexOf.call( arr, elem, i );

},

// Support: Android <=4.0 only, PhantomJS 1 only

// push.apply(_, arraylike) throws on ancient WebKit

merge: function( first, second ) {

var len = +second.length,

j = 0,

i = first.length;

for ( ; j < len; j++ ) {

first[ i++ ] = second[ j ];

}

first.length = i;

return first;

},

grep: function( elems, callback, invert ) {

var callbackInverse,

matches = [],

i = 0,

length = elems.length,

callbackExpect = !invert;

// Go through the array, only saving the items

// that pass the validator function

for ( ; i < length; i++ ) {

callbackInverse = !callback( elems[ i ], i );

if ( callbackInverse !== callbackExpect ) {

matches.push( elems[ i ] );

}

}

return matches;

},

// arg is for internal usage only

map: function( elems, callback, arg ) {

var length, value,

i = 0,

ret = [];

// Go through the array, translating each of the items to their new values

if ( isArrayLike( elems ) ) {

length = elems.length;

for ( ; i < length; i++ ) {

value = callback( elems[ i ], i, arg );

if ( value != null ) {

ret.push( value );

}

}

// Go through every key on the object,

} else {

for ( i in elems ) {

value = callback( elems[ i ], i, arg );

if ( value != null ) {

ret.push( value );

}

}

}

// Flatten any nested arrays

return concat.apply( [], ret );

},

// A global GUID counter for objects

guid: 1,

// Bind a function to a context, optionally partially applying any

// arguments.

proxy: function( fn, context ) {

var tmp, args, proxy;

if ( typeof context === "string" ) {

tmp = fn[ context ];

context = fn;

fn = tmp;

}

// Quick check to determine if target is callable, in the spec

// this throws a TypeError, but we will just return undefined.

if ( !jQuery.isFunction( fn ) ) {

return undefined;

}

// Simulated bind

args = slice.call( arguments, 2 );

proxy = function() {

return fn.apply( context || this, args.concat( slice.call( arguments ) ) );

};

// Set the guid of unique handler to the same of original handler, so it can be removed

proxy.guid = fn.guid = fn.guid || jQuery.guid++;

return proxy;

},

now: Date.now,

// jQuery.support is not used in Core but other projects attach their

// properties to it so it needs to exist.

support: support

} );

if ( typeof Symbol === "function" ) {

jQuery.fn[ Symbol.iterator ] = arr[ Symbol.iterator ];

}

// Populate the class2type map

jQuery.each( "Boolean Number String Function Array Date RegExp Object Error Symbol".split( " " ),

function( i, name ) {

class2type[ "[object " + name + "]" ] = name.toLowerCase();

} );

function isArrayLike( obj ) {

// Support: real iOS 8.2 only (not reproducible in simulator)

// `in` check used to prevent JIT error (gh-2145)

// hasOwn isn't used here due to false negatives

// regarding Nodelist length in IE

var length = !!obj && "length" in obj && obj.length,

type = jQuery.type( obj );

if ( type === "function" || jQuery.isWindow( obj ) ) {

return false;

}

return type === "array" || length === 0 ||

typeof length === "number" && length > 0 && ( length - 1 ) in obj;

}

var Sizzle =

/*!

* Sizzle CSS Selector Engine v2.3.3

* https://sizzlejs.com/

*

* Copyright jQuery Foundation and other contributors

* Released under the MIT license

* http://jquery.org/license

*

* Date: 2016-08-08

*/

(function( window ) {

var i,

support,

Expr,

getText,

isXML,

tokenize,

compile,

select,

outermostContext,

sortInput,

hasDuplicate,

// Local document vars

setDocument,

document,

docElem,

documentIsHTML,

rbuggyQSA,

rbuggyMatches,

matches,

contains,

// Instance-specific data

expando = "sizzle" + 1 * new Date(),

preferredDoc = window.document,

dirruns = 0,

done = 0,

classCache = createCache(),

tokenCache = createCache(),

compilerCache = createCache(),

sortOrder = function( a, b ) {

if ( a === b ) {

hasDuplicate = true;

}

return 0;

},

// Instance methods

hasOwn = ({}).hasOwnProperty,

arr = [],

pop = arr.pop,

push_native = arr.push,

push = arr.push,

slice = arr.slice,

// Use a stripped-down indexOf as it's faster than native

// https://jsperf.com/thor-indexof-vs-for/5

indexOf = function( list, elem ) {

var i = 0,

len = list.length;

for ( ; i < len; i++ ) {

if ( list[i] === elem ) {

return i;

}

}

return -1;

},

booleans = "checked|selected|async|autofocus|autoplay|controls|defer|disabled|hidden|ismap|loop|multiple|open|readonly|required|scoped",

// Regular expressions

// http://www.w3.org/TR/css3-selectors/#whitespace

whitespace = "[\\x20\\t\\r\\n\\f]",

// http://www.w3.org/TR/CSS21/syndata.html#value-def-identifier

identifier = "(?:\\\\.|[\\w-]|[^\0-\\xa0])+",

// Attribute selectors: http://www.w3.org/TR/selectors/#attribute-selectors

attributes = "\\[" + whitespace + "*(" + identifier + ")(?:" + whitespace +

// Operator (capture 2)

"*([*^$|!~]?=)" + whitespace +

// "Attribute values must be CSS identifiers [capture 5] or strings [capture 3 or capture 4]"

"*(?:'((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\"|(" + identifier + "))|)" + whitespace +

"*\\]",

pseudos = ":(" + identifier + ")(?:\\((" +

// To reduce the number of selectors needing tokenize in the preFilter, prefer arguments:

// 1. quoted (capture 3; capture 4 or capture 5)

"('((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\")|" +

// 2. simple (capture 6)

"((?:\\\\.|[^\\\\()[\\]]|" + attributes + ")*)|" +

// 3. anything else (capture 2)

".*" +

")\\)|)",

// Leading and non-escaped trailing whitespace, capturing some non-whitespace characters preceding the latter

rwhitespace = new RegExp( whitespace + "+", "g" ),

rtrim = new RegExp( "^" + whitespace + "+|((?:^|[^\\\\])(?:\\\\.)*)" + whitespace + "+$", "g" ),

rcomma = new RegExp( "^" + whitespace + "*," + whitespace + "*" ),

rcombinators = new RegExp( "^" + whitespace + "*([>+~]|" + whitespace + ")" + whitespace + "*" ),

rattributeQuotes = new RegExp( "=" + whitespace + "*([^\\]'\"]*?)" + whitespace + "*\\]", "g" ),

rpseudo = new RegExp( pseudos ),

ridentifier = new RegExp( "^" + identifier + "$" ),

matchExpr = {

"ID": new RegExp( "^#(" + identifier + ")" ),

"CLASS": new RegExp( "^\\.(" + identifier + ")" ),

"TAG": new RegExp( "^(" + identifier + "|[*])" ),

"ATTR": new RegExp( "^" + attributes ),

"PSEUDO": new RegExp( "^" + pseudos ),

"CHILD": new RegExp( "^:(only|first|last|nth|nth-last)-(child|of-type)(?:\\(" + whitespace +

"*(even|odd|(([+-]|)(\\d*)n|)" + whitespace + "*(?:([+-]|)" + whitespace +

"*(\\d+)|))" + whitespace + "*\\)|)", "i" ),

"bool": new RegExp( "^(?:" + booleans + ")$", "i" ),

// For use in libraries implementing .is()

// We use this for POS matching in `select`

"needsContext": new RegExp( "^" + whitespace + "*[>+~]|:(even|odd|eq|gt|lt|nth|first|last)(?:\\(" +

whitespace + "*((?:-\\d)?\\d*)" + whitespace + "*\\)|)(?=[^-]|$)", "i" )

},

rinputs = /^(?:input|select|textarea|button)$/i,

rheader = /^h\d$/i,

rnative = /^[^{]+\{\s*\[native \w/,

// Easily-parseable/retrievable ID or TAG or CLASS selectors

rquickExpr = /^(?:#([\w-]+)|(\w+)|\.([\w-]+))$/,

rsibling = /[+~]/,

// CSS escapes

// http://www.w3.org/TR/CSS21/syndata.html#escaped-characters

runescape = new RegExp( "\\\\([\\da-f]{1,6}" + whitespace + "?|(" + whitespace + ")|.)", "ig" ),

funescape = function( _, escaped, escapedWhitespace ) {

var high = "0x" + escaped - 0x10000;

// NaN means non-codepoint

// Support: Firefox<24

// Workaround erroneous numeric interpretation of +"0x"

return high !== high || escapedWhitespace ?

escaped :

high < 0 ?

// BMP codepoint

String.fromCharCode( high + 0x10000 ) :

// Supplemental Plane codepoint (surrogate pair)

String.fromCharCode( high >> 10 | 0xD800, high & 0x3FF | 0xDC00 );

},

// CSS string/identifier serialization

// https://drafts.csswg.org/cssom/#common-serializing-idioms

rcssescape = /([\0-\x1f\x7f]|^-?\d)|^-$|[^\0-\x1f\x7f-\uFFFF\w-]/g,

fcssescape = function( ch, asCodePoint ) {

if ( asCodePoint ) {

// U+0000 NULL becomes U+FFFD REPLACEMENT CHARACTER

if ( ch === "\0" ) {

return "\uFFFD";

}

// Control characters and (dependent upon position) numbers get escaped as code points

return ch.slice( 0, -1 ) + "\\" + ch.charCodeAt( ch.length - 1 ).toString( 16 ) + " ";

}

// Other potentially-special ASCII characters get backslash-escaped

return "\\" + ch;

},

// Used for iframes

// See setDocument()

// Removing the function wrapper causes a "Permission Denied"

// error in IE

unloadHandler = function() {

setDocument();

},

disabledAncestor = addCombinator(

function( elem ) {

return elem.disabled === true && ("form" in elem || "label" in elem);

},

{ dir: "parentNode", next: "legend" }

);

// Optimize for push.apply( _, NodeList )

try {

push.apply(

(arr = slice.call( preferredDoc.childNodes )),

preferredDoc.childNodes

);

// Support: Android<4.0

// Detect silently failing push.apply

arr[ preferredDoc.childNodes.length ].nodeType;

} catch ( e ) {

push = { apply: arr.length ?

// Leverage slice if possible

function( target, els ) {

push_native.apply( target, slice.call(els) );

} :

// Support: IE<9

// Otherwise append directly

function( target, els ) {

var j = target.length,

i = 0;

// Can't trust NodeList.length

while ( (target[j++] = els[i++]) ) {}

target.length = j - 1;

}

};

}

function Sizzle( selector, context, results, seed ) {

var m, i, elem, nid, match, groups, newSelector,

newContext = context && context.ownerDocument,

// nodeType defaults to 9, since context defaults to document

nodeType = context ? context.nodeType : 9;

results = results || [];

// Return early from calls with invalid selector or context

if ( typeof selector !== "string" || !selector ||

nodeType !== 1 && nodeType !== 9 && nodeType !== 11 ) {

return results;

}

// Try to shortcut find operations (as opposed to filters) in HTML documents

if ( !seed ) {

if ( ( context ? context.ownerDocument || context : preferredDoc ) !== document ) {

setDocument( context );

}

context = context || document;

if ( documentIsHTML ) {

// If the selector is sufficiently simple, try using a "get*By*" DOM method

// (excepting DocumentFragment context, where the methods don't exist)

if ( nodeType !== 11 && (match = rquickExpr.exec( selector )) ) {

// ID selector

if ( (m = match[1]) ) {

// Document context

if ( nodeType === 9 ) {

if ( (elem = context.getElementById( m )) ) {

// Support: IE, Opera, Webkit

// TODO: identify versions

// getElementById can match elements by name instead of ID

if ( elem.id === m ) {

results.push( elem );

return results;

}

} else {

return results;

}

// Element context

} else {

// Support: IE, Opera, Webkit

// TODO: identify versions

// getElementById can match elements by name instead of ID

if ( newContext && (elem = newContext.getElementById( m )) &&

contains( context, elem ) &&

elem.id === m ) {

results.push( elem );

return results;

}

}

// Type selector

} else if ( match[2] ) {

push.apply( results, context.getElementsByTagName( selector ) );

return results;

// Class selector

} else if ( (m = match[3]) && support.getElementsByClassName &&

context.getElementsByClassName ) {

push.apply( results, context.getElementsByClassName( m ) );

return results;

}

}

// Take advantage of querySelectorAll

if ( support.qsa &&

!compilerCache[ selector + " " ] &&

(!rbuggyQSA || !rbuggyQSA.test( selector )) ) {

if ( nodeType !== 1 ) {

newContext = context;

newSelector = selector;

// qSA looks outside Element context, which is not what we want

// Thanks to Andrew Dupont for this workaround technique

// Support: IE <=8

// Exclude object elements

} else if ( context.nodeName.toLowerCase() !== "object" ) {

// Capture the context ID, setting it first if necessary

if ( (nid = context.getAttribute( "id" )) ) {

nid = nid.replace( rcssescape, fcssescape );

} else {

context.setAttribute( "id", (nid = expando) );

}

// Prefix every selector in the list

groups = tokenize( selector );

i = groups.length;

while ( i-- ) {

groups[i] = "#" + nid + " " + toSelector( groups[i] );

}

newSelector = groups.join( "," );

// Expand context for sibling selectors

newContext = rsibling.test( selector ) && testContext( context.parentNode ) ||

context;

}

if ( newSelector ) {

try {

push.apply( results,

newContext.querySelectorAll( newSelector )

);

return results;

} catch ( qsaError ) {

} finally {

if ( nid === expando ) {

context.removeAttribute( "id" );

}

}

}

}

}

}

// All others

return select( selector.replace( rtrim, "$1" ), context, results, seed );

}

/**

* Create key-value caches of limited size

* @returns {function(string, object)} Returns the Object data after storing it on itself with

* property name the (space-suffixed) string and (if the cache is larger than Expr.cacheLength)

* deleting the oldest entry

*/

function createCache() {

var keys = [];

function cache( key, value ) {

// Use (key + " ") to avoid collision with native prototype properties (see Issue #157)

if ( keys.push( key + " " ) > Expr.cacheLength ) {

// Only keep the most recent entries

delete cache[ keys.shift() ];

}

return (cache[ key + " " ] = value);

}

return cache;

}

/**

* Mark a function for special use by Sizzle

* @param {Function} fn The function to mark

*/

function markFunction( fn ) {

fn[ expando ] = true;

return fn;

}

/**

* Support testing using an element

* @param {Function} fn Passed the created element and returns a boolean result

*/

function assert( fn ) {

var el = document.createElement("fieldset");

try {

return !!fn( el );

} catch (e) {

return false;

} finally {

// Remove from its parent by default

if ( el.parentNode ) {

el.parentNode.removeChild( el );

}

// release memory in IE

el = null;

}

}

/**

* Adds the same handler for all of the specified attrs

* @param {String} attrs Pipe-separated list of attributes

* @param {Function} handler The method that will be applied

*/

function addHandle( attrs, handler ) {

var arr = attrs.split("|"),

i = arr.length;

while ( i-- ) {

Expr.attrHandle[ arr[i] ] = handler;

}

}

/**

* Checks document order of two siblings

* @param {Element} a

* @param {Element} b

* @returns {Number} Returns less than 0 if a precedes b, greater than 0 if a follows b

*/

function siblingCheck( a, b ) {

var cur = b && a,

diff = cur && a.nodeType === 1 && b.nodeType === 1 &&

a.sourceIndex - b.sourceIndex;

// Use IE sourceIndex if available on both nodes

if ( diff ) {

return diff;

}

// Check if b follows a

if ( cur ) {

while ( (cur = cur.nextSibling) ) {

if ( cur === b ) {

return -1;

}

}

}

return a ? 1 : -1;

}

/**

* Returns a function to use in pseudos for input types

* @param {String} type

*/

function createInputPseudo( type ) {

return function( elem ) {

var name = elem.nodeName.toLowerCase();

return name === "input" && elem.type === type;

};

}

/**

* Returns a function to use in pseudos for buttons

* @param {String} type

*/

function createButtonPseudo( type ) {

return function( elem ) {

var name = elem.nodeName.toLowerCase();

return (name === "input" || name === "button") && elem.type === type;

};

}