jsgamepad/docs/index.js

W3C Gamepad API Simplified & Implementation fixes

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 * jQuery JavaScript Library v3.1.1
 * https://jquery.com/
 *
 * Includes Sizzle.js
 * https://sizzlejs.com/
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license
 * https://jquery.org/license
 *
 * Date: 2016-09-22T22:30Z
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	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,
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		    hasDuplicate,


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


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


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		attributes = "\\[" + whitespace + "*(" + identifier + ")(?:" + whitespace +
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		"*(?:'((?:\\\\.|[^\\\\'])*)'|\"((?:\\\\.|[^\\\\\"])*)\"|(" + identifier + "))|)" + whitespace + "*\\]",
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		// 2. simple (capture 6)
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		".*" + ")\\)|)",


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

		/**
   * Returns a function to use in pseudos for :enabled/:disabled
   * @param {Boolean} disabled true for :disabled; false for :enabled
   */
		function createDisabledPseudo(disabled) {

			// Known :disabled false positives: fieldset[disabled] > legend:nth-of-type(n+2) :can-disable
			return function (elem) {

				// Only certain elements can match :enabled or :disabled
				// https://html.spec.whatwg.org/multipage/scripting.html#selector-enabled
				// https://html.spec.whatwg.org/multipage/scripting.html#selector-disabled
				if ("form" in elem) {

					// Check for inherited disabledness on relevant non-disabled elements:
					// * listed form-associated elements in a disabled fieldset
					//   https://html.spec.whatwg.org/multipage/forms.html#category-listed
					//   https://html.spec.whatwg.org/multipage/forms.html#concept-fe-disabled
					// * option elements in a disabled optgroup
					//   https://html.spec.whatwg.org/multipage/forms.html#concept-option-disabled
					// All such elements have a "form" property.
					if (elem.parentNode && elem.disabled === false) {

						// Option elements defer to a parent optgroup if present
						if ("label" in elem) {
							if ("label" in elem.parentNode) {
								return elem.parentNode.disabled === disabled;
							} else {
								return elem.disabled === disabled;
							}
						}

						// Support: IE 6 - 11
						// Use the isDisabled shortcut property to check for disabled fieldset ancestors
						return elem.isDisabled === disabled ||

						// Where there is no isDisabled, check manually
						/* jshint -W018 */
						elem.isDisabled !== !disabled && disabledAncestor(elem) === disabled;
					}

					return elem.disabled === disabled;

					// Try to winnow out elements that can't be disabled before trusting the disabled property.
					// Some victims get caught in our net (label, legend, menu, track), but it shouldn't
					// even exist on them, let alone have a boolean value.
				} else if ("label" in elem) {
					return elem.disabled === disabled;
				}

				// Remaining elements are neither :enabled nor :disabled
				return false;
			};
		}

		/**
   * Returns a function to use in pseudos for positionals
   * @param {Function} fn
   */
		function createPositionalPseudo(fn) {
			return markFunction(function (argument) {
				argument = +argument;
				return markFunction(function (seed, matches) {
					var j,
					    matchIndexes = fn([], seed.length, argument),
					    i = matchIndexes.length;

					// Match elements found at the specified indexes
					while (i--) {
						if (seed[j = matchIndexes[i]]) {
							seed[j] = !(matches[j] = seed[j]);
						}
					}
				});
			});
		}

		/**
   * Checks a node for validity as a Sizzle context
   * @param {Element|Object=} context
   * @returns {Element|Object|Boolean} The input node if acceptable, otherwise a falsy value
   */
		function testContext(context) {
			return context && typeof context.getElementsByTagName !== "undefined" && context;
		}

		// Expose support vars for convenience
		support = Sizzle.support = {};

		/**
   * Detects XML nodes
   * @param {Element|Object} elem An element or a document
   * @returns {Boolean} True iff elem is a non-HTML XML node
   */
		isXML = Sizzle.isXML = function (elem) {
			// documentElement is verified for cases where it doesn't yet exist
			// (such as loading iframes in IE - #4833)
			var documentElement = elem && (elem.ownerDocument || elem).documentElement;
			return documentElement ? documentElement.nodeName !== "HTML" : false;
		};

		/**
   * Sets document-related variables once based on the current document
   * @param {Element|Object} [doc] An element or document object to use to set the document
   * @returns {Object} Returns the current document
   */
		setDocument = Sizzle.setDocument = function (node) {
			var hasCompare,
			    subWindow,
			    doc = node ? node.ownerDocument || node : preferredDoc;

			// Return early if doc is invalid or already selected
			if (doc === document || doc.nodeType !== 9 || !doc.documentElement) {
				return document;
			}

			// Update global variables
			document = doc;
			docElem = document.documentElement;
			documentIsHTML = !isXML(document);

			// Support: IE 9-11, Edge
			// Accessing iframe documents after unload throws "permission denied" errors (jQuery #13936)
			if (preferredDoc !== document && (subWindow = document.defaultView) && subWindow.top !== subWindow) {

				// Support: IE 11, Edge
				if (subWindow.addEventListener) {
					subWindow.addEventListener("unload", unloadHandler, false);

					// Support: IE 9 - 10 only
				} else if (subWindow.attachEvent) {
					subWindow.attachEvent("onunload", unloadHandler);
				}
			}

			/* Attributes
   ---------------------------------------------------------------------- */

			// Support: IE<8
			// Verify that getAttribute really returns attributes and not properties
			// (excepting IE8 booleans)
			support.attributes = assert(function (el) {
				el.className = "i";
				return !el.getAttribute("className");
			});

			/* getElement(s)By*
   ---------------------------------------------------------------------- */

			// Check if getElementsByTagName("*") returns only elements
			support.getElementsByTagName = assert(function (el) {
				el.appendChild(document.createComment(""));
				return !el.getElementsByTagName("*").length;
			});

			// Support: IE<9
			support.getElementsByClassName = rnative.test(document.getElementsByClassName);

			// Support: IE<10
			// Check if getElementById returns elements by name
			// The broken getElementById methods don't pick up programmatically-set names,
			// so use a roundabout getElementsByName test
			support.getById = assert(function (el) {
				docElem.appendChild(el).id = expando;
				return !document.getElementsByName || !document.getElementsByName(expando).length;
			});

			// ID filter and find
			if (support.getById) {
				Expr.filter["ID"] = function (id) {
					var attrId = id.replace(runescape, funescape);
					return function (elem) {
						return elem.getAttribute("id") === attrId;
					};
				};
				Expr.find["ID"] = function (id, context) {
					if (typeof context.getElementById !== "undefined" && documentIsHTML) {
						var elem = context.getElementById(id);
						return elem ? [elem] : [];
					}
				};
			} else {
				Expr.filter["ID"] = function (id) {
					var attrId = id.replace(runescape, funescape);
					return function (elem) {
						var node = typeof elem.getAttributeNode !== "undefined" && elem.getAttributeNode("id");
						return node && node.value === attrId;
					};
				};

				// Support: IE 6 - 7 only
				// getElementById is not reliable as a find shortcut
				Expr.find["ID"] = function (id, context) {
					if (typeof context.getElementById !== "undefined" && documentIsHTML) {
						var node,
						    i,
						    elems,
						    elem = context.getElementById(id);

						if (elem) {

							// Verify the id attribute
							node = elem.getAttributeNode("id");
							if (node && node.value === id) {
								return [elem];
							}

							// Fall back on getElementsByName
							elems = context.getElementsByName(id);
							i = 0;
							while (elem = elems[i++]) {
								node = elem.getAttributeNode("id");
								if (node && node.value === id) {
									return [elem];
								}
							}
						}

						return [];
					}
				};
			}

			// Tag
			Expr.find["TAG"] = support.getElementsByTagName ? function (tag, context) {
				if (typeof context.getElementsByTagName !== "undefined") {
					return context.getElementsByTagName(tag);

					// DocumentFragment nodes don't have gEBTN
				} else if (support.qsa) {
					return context.querySelectorAll(tag);
				}
			} : function (tag, context) {
				var elem,
				    tmp = [],
				    i = 0,

				// By happy coincidence, a (broken) gEBTN appears on DocumentFragment nodes too
				results = context.getElementsByTagName(tag);

				// Filter out possible comments
				if (tag === "*") {
					while (elem = results[i++]) {
						if (elem.nodeType === 1) {
							tmp.push(elem);
						}
					}

					return tmp;
				}
				return results;
			};

			// Class
			Expr.find["CLASS"] = support.getElementsByClassName && function (className, context) {
				if (typeof context.getElementsByClassName !== "undefined" && documentIsHTML) {
					return context.getElementsByClassName(className);
				}
			};

			/* QSA/matchesSelector
   ---------------------------------------------------------------------- */

			// QSA and matchesSelector support

			// matchesSelector(:active) reports false when true (IE9/Opera 11.5)
			rbuggyMatches = [];

			// qSa(:focus) reports false when true (Chrome 21)
			// We allow this because of a bug in IE8/9 that throws an error
			// whenever `document.activeElement` is accessed on an iframe
			// So, we allow :focus to pass through QSA all the time to avoid the IE error
			// See https://bugs.jquery.com/ticket/13378
			rbuggyQSA = [];

			if (support.qsa = rnative.test(document.querySelectorAll)) {
				// Build QSA regex
				// Regex strategy adopted from Diego Perini
				assert(function (el) {
					// Select is set to empty string on purpose
					// This is to test IE's treatment of not explicitly
					// setting a boolean content attribute,
					// since its presence should be enough
					// https://bugs.jquery.com/ticket/12359
					docElem.appendChild(el).innerHTML = "<a id='" + expando + "'></a>" + "<select id='" + expando + "-\r\\' msallowcapture=''>" + "<option selected=''></option></select>";

					// Support: IE8, Opera 11-12.16
					// Nothing should be selected when empty strings follow ^= or $= or *=
					// The test attribute must be unknown in Opera but "safe" for WinRT
					// https://msdn.microsoft.com/en-us/library/ie/hh465388.aspx#attribute_section
					if (el.querySelectorAll("[msallowcapture^='']").length) {
						rbuggyQSA.push("[*^$]=" + whitespace + "*(?:''|\"\")");
					}

					// Support: IE8
					// Boolean attributes and "value" are not treated correctly
					if (!el.querySelectorAll("[selected]").length) {
						rbuggyQSA.push("\\[" + whitespace + "*(?:value|" + booleans + ")");
					}

					// Support: Chrome<29, Android<4.4, Safari<7.0+, iOS<7.0+, PhantomJS<1.9.8+
					if (!el.querySelectorAll("[id~=" + expando + "-]").length) {
						rbuggyQSA.push("~=");
					}

					// Webkit/Opera - :checked should return selected option elements
					// http://www.w3.org/TR/2011/REC-css3-selectors-20110929/#checked
					// IE8 throws error here and will not see later tests
					if (!el.querySelectorAll(":checked").length) {
						rbuggyQSA.push(":checked");
					}

					// Support: Safari 8+, iOS 8+
					// https://bugs.webkit.org/show_bug.cgi?id=136851
					// In-page `selector#id sibling-combinator selector` fails
					if (!el.querySelectorAll("a#" + expando + "+*").length) {
						rbuggyQSA.push(".#.+[+~]");
					}
				});

				assert(function (el) {
					el.innerHTML = "<a href='' disabled='disabled'></a>" + "<select disabled='disabled'><option/></select>";

					// Support: Windows 8 Native Apps
					// The type and name attributes are restricted during .innerHTML assignment
					var input = document.createElement("input");
					input.setAttribute("type", "hidden");
					el.appendChild(input).setAttribute("name", "D");

					// Support: IE8
					// Enforce case-sensitivity of name attribute
					if (el.querySelectorAll("[name=d]").length) {
						rbuggyQSA.push("name" + whitespace + "*[*^$|!~]?=");
					}

					// FF 3.5 - :enabled/:disabled and hidden elements (hidden elements are still enabled)
					// IE8 throws error here and will not see later tests
					if (el.querySelectorAll(":enabled").length !== 2) {
						rbuggyQSA.push(":enabled", ":disabled");
					}

					// Support: IE9-11+
					// IE's :disabled selector does not pick up the children of disabled fieldsets
					docElem.appendChild(el).disabled = true;
					if (el.querySelectorAll(":disabled").length !== 2) {
						rbuggyQSA.push(":enabled", ":disabled");
					}

					// Opera 10-11 does not throw on post-comma invalid pseudos
					el.querySelectorAll("*,:x");
					rbuggyQSA.push(",.*:");
				});
			}

			if (support.matchesSelector = rnative.test(matches = docElem.matches || docElem.webkitMatchesSelector || docElem.mozMatchesSelector || docElem.oMatchesSelector || docElem.msMatchesSelector)) {

				assert(function (el) {
					// Check to see if it's possible to do matchesSelector
					// on a disconnected node (IE 9)
					support.disconnectedMatch = matches.call(el, "*");

					// This should fail with an exception
					// Gecko does not error, returns false instead
					matches.call(el, "[s!='']:x");
					rbuggyMatches.push("!=", pseudos);
				});
			}

			rbuggyQSA = rbuggyQSA.length && new RegExp(rbuggyQSA.join("|"));
			rbuggyMatches = rbuggyMatches.length && new RegExp(rbuggyMatches.join("|"));

			/* Contains
   ---------------------------------------------------------------------- */
			hasCompare = rnative.test(docElem.compareDocumentPosition);

			// Element contains another
			// Purposefully self-exclusive
			// As in, an element does not contain itself
			contains = hasCompare || rnative.test(docElem.contains) ? function (a, b) {
				var adown = a.nodeType === 9 ? a.documentElement : a,
				    bup = b && b.parentNode;
				return a === bup || !!(bup && bup.nodeType === 1 && (adown.contains ? adown.contains(bup) : a.compareDocumentPosition && a.compareDocumentPosition(bup) & 16));
			} : function (a, b) {
				if (b) {
					while (b = b.parentNode) {
						if (b === a) {
							return true;
						}
					}
				}
				return false;
			};

			/* Sorting
   ---------------------------------------------------------------------- */

			// Document order sorting
			sortOrder = hasCompare ? function (a, b) {

				// Flag for duplicate removal
				if (a === b) {
					hasDuplicate = true;
					return 0;
				}

				// Sort on method existence if only one input has compareDocumentPosition
				var compare = !a.compareDocumentPosition - !b.compareDocumentPosition;
				if (compare) {
					return compare;
				}

				// Calculate position if both inputs belong to the same document
				compare = (a.ownerDocument || a) === (b.ownerDocument || b) ? a.compareDocumentPosition(b) :

				// Otherwise we know they are disconnected
				1;

				// Disconnected nodes
				if (compare & 1 || !support.sortDetached && b.compareDocumentPosition(a) === compare) {

					// Choose the first element that is related to our preferred document
					if (a === document || a.ownerDocument === preferredDoc && contains(preferredDoc, a)) {
						return -1;
					}
					if (b === document || b.ownerDocument === preferredDoc && contains(preferredDoc, b)) {
						return 1;
					}

					// Maintain original order
					return sortInput ? indexOf(sortInput, a) - indexOf(sortInput, b) : 0;
				}

				return compare & 4 ? -1 : 1;
			} : function (a, b) {
				// Exit early if the nodes are identical
				if (a === b) {
					hasDuplicate = true;
					return 0;
				}

				var cur,
				    i = 0,
				    aup = a.parentNode,
				    bup = b.parentNode,
				    ap = [a],
				    bp = [b];

				// Parentless nodes are either documents or disconnected
				if (!aup || !bup) {
					return a === document ? -1 : b === document ? 1 : aup ? -1 : bup ? 1 : sortInput ? indexOf(sortInput, a) - indexOf(sortInput, b) : 0;

					// If the nodes are siblings, we can do a quick check
				} else if (aup === bup) {
					return siblingCheck(a, b);
				}

				// Otherwise we need full lists of their ancestors for comparison
				cur = a;
				while (cur = cur.parentNode) {
					ap.unshift(cur);
				}
				cur = b;
				while (cur = cur.parentNode) {
					bp.unshift(cur);
				}

				// Walk down the tree looking for a discrepancy
				while (ap[i] === bp[i]) {
					i++;
				}

				return i ?
				// Do a sibling check if the nodes have a common ancestor
				siblingCheck(ap[i], bp[i]) :

				// Otherwise nodes in our document sort first
				ap[i] === preferredDoc ? -1 : bp[i] === preferredDoc ? 1 : 0;
			};

			return document;
		};

		Sizzle.matches = function (expr, elements) {
			return Sizzle(expr, null, null, elements);
		};

		Sizzle.matchesSelector = function (elem, expr) {
			// Set document vars if needed
			if ((elem.ownerDocument || elem) !== document) {
				setDocument(elem);
			}

			// Make sure that attribute selectors are quoted
			expr = expr.replace(rattributeQuotes, "='$1']");

			if (support.matchesSelector && documentIsHTML && !compilerCache[expr + " "] && (!rbuggyMatches || !rbuggyMatches.test(expr)) && (!rbuggyQSA || !rbuggyQSA.test(expr))) {

				try {
					var ret = matches.call(elem, expr);

					// IE 9's matchesSelector returns false on disconnected nodes
					if (ret || support.disconnectedMatch ||
					// As well, disconnected nodes are said to be in a document
					// fragment in IE 9
					elem.document && elem.document.nodeType !== 11) {
						return ret;
					}
				} catch (e) {}
			}

			return Sizzle(expr, document, null, [elem]).length > 0;
		};

		Sizzle.contains = function (context, elem) {
			// Set document vars if needed
			if ((context.ownerDocument || context) !== document) {
				setDocument(context);
			}
			return contains(context, elem);
		};

		Sizzle.attr = function (elem, name) {
			// Set document vars if needed
			if ((elem.ownerDocument || elem) !== document) {
				setDocument(elem);
			}

			var fn = Expr.attrHandle[name.toLowerCase()],

			// Don't get fooled by Object.prototype properties (jQuery #13807)
			val = fn && hasOwn.call(Expr.attrHandle, name.toLowerCase()) ? fn(elem, name, !documentIsHTML) : undefined;

			return val !== undefined ? val : support.attributes || !documentIsHTML ? elem.getAttribute(name) : (val = elem.getAttributeNode(name)) && val.specified ? val.value : null;
		};

		Sizzle.escape = function (sel) {
			return (sel + "").replace(rcssescape, fcssescape);
		};

		Sizzle.error = function (msg) {
			throw new Error("Syntax error, unrecognized expression: " + msg);
		};

		/**
   * Document sorting and removing duplicates
   * @param {ArrayLike} results
   */
		Sizzle.uniqueSort = function (results) {
			var elem,
			    duplicates = [],
			    j = 0,
			    i = 0;

			// Unless we *know* we can detect duplicates, assume their presence
			hasDuplicate = !support.detectDuplicates;
			sortInput = !support.sortStable && results.slice(0);
			results.sort(sortOrder);

			if (hasDuplicate) {
				while (elem = results[i++]) {
					if (elem === results[i]) {
						j = duplicates.push(i);
					}
				}
				while (j--) {
					results.splice(duplicates[j], 1);
				}
			}

			// Clear input after sorting to release objects
			// See https://github.com/jquery/sizzle/pull/225
			sortInput = null;

			return results;
		};

		/**
   * Utility function for retrieving the text value of an array of DOM nodes
   * @param {Array|Element} elem
   */
		getText = Sizzle.getText = function (elem) {
			var node,
			    ret = "",
			    i = 0,
			    nodeType = elem.nodeType;

			if (!nodeType) {
				// If no nodeType, this is expected to be an array
				while (node = elem[i++]) {
					// Do not traverse comment nodes
					ret += getText(node);
				}
			} else if (nodeType === 1 || nodeType === 9 || nodeType === 11) {
				// Use textContent for elements
				// innerText usage removed for consistency of new lines (jQuery #11153)
				if (typeof elem.textContent === "string") {
					return elem.textContent;
				} else {
					// Traverse its children
					for (elem = elem.firstChild; elem; elem = elem.nextSibling) {
						ret += getText(elem);
					}
				}
			} else if (nodeType === 3 || nodeType === 4) {
				return elem.nodeValue;
			}
			// Do not include comment or processing instruction nodes

			return ret;
		};

		Expr = Sizzle.selectors = {

			// Can be adjusted by the user
			cacheLength: 50,

			createPseudo: markFunction,

			match: matchExpr,

			attrHandle: {},

			find: {},

			rel