/*! jQuery UI - v1.12.1 - 2017-05-24
* http://jqueryui.com
* Includes: widget.js, keycode.js, unique-id.js, widgets/tabs.js
* Copyright jQuery Foundation and other contributors; Licensed MIT */

(function( factory ) {
	if ( typeof define === "function" && define.amd ) {

		// AMD. Register as an anonymous module.
		define([ "jquery" ], factory );
	} else {

		// Browser globals
		factory( jQuery );
	}
}(function( $ ) {

$.ui = $.ui || {};

var version = $.ui.version = "1.12.1";


/*!
 * jQuery UI Widget 1.12.1
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 */

//>>label: Widget
//>>group: Core
//>>description: Provides a factory for creating stateful widgets with a common API.
//>>docs: http://api.jqueryui.com/jQuery.widget/
//>>demos: http://jqueryui.com/widget/


var widgetUuid = 0;
var widgetSlice = Array.prototype.slice;

$.cleanData = ( function( orig ) {
	return function( elems ) {
		var events, elem, i;
		for ( i = 0; ( elem = elems[ i ] ) != null; i++ ) {
			try {

				// Only trigger remove when necessary to save time
				events = $._data( elem, "events" );
				if ( events && events.remove ) {
					$( elem ).triggerHandler( "remove" );
				}

			// Http://bugs.jquery.com/ticket/8235
			} catch ( e ) {}
		}
		orig( elems );
	};
} )( $.cleanData );

$.widget = function( name, base, prototype ) {
	var existingConstructor, constructor, basePrototype;

	// ProxiedPrototype allows the provided prototype to remain unmodified
	// so that it can be used as a mixin for multiple widgets (#8876)
	var proxiedPrototype = {};

	var namespace = name.split( "." )[ 0 ];
	name = name.split( "." )[ 1 ];
	var fullName = namespace + "-" + name;

	if ( !prototype ) {
		prototype = base;
		base = $.Widget;
	}

	if ( $.isArray( prototype ) ) {
		prototype = $.extend.apply( null, [ {} ].concat( prototype ) );
	}

	// Create selector for plugin
	$.expr[ ":" ][ fullName.toLowerCase() ] = function( elem ) {
		return !!$.data( elem, fullName );
	};

	$[ namespace ] = $[ namespace ] || {};
	existingConstructor = $[ namespace ][ name ];
	constructor = $[ namespace ][ name ] = function( options, element ) {

		// Allow instantiation without "new" keyword
		if ( !this._createWidget ) {
			return new constructor( options, element );
		}

		// Allow instantiation without initializing for simple inheritance
		// must use "new" keyword (the code above always passes args)
		if ( arguments.length ) {
			this._createWidget( options, element );
		}
	};

	// Extend with the existing constructor to carry over any static properties
	$.extend( constructor, existingConstructor, {
		version: prototype.version,

		// Copy the object used to create the prototype in case we need to
		// redefine the widget later
		_proto: $.extend( {}, prototype ),

		// Track widgets that inherit from this widget in case this widget is
		// redefined after a widget inherits from it
		_childConstructors: []
	} );

	basePrototype = new base();

	// We need to make the options hash a property directly on the new instance
	// otherwise we'll modify the options hash on the prototype that we're
	// inheriting from
	basePrototype.options = $.widget.extend( {}, basePrototype.options );
	$.each( prototype, function( prop, value ) {
		if ( !$.isFunction( value ) ) {
			proxiedPrototype[ prop ] = value;
			return;
		}
		proxiedPrototype[ prop ] = ( function() {
			function _super() {
				return base.prototype[ prop ].apply( this, arguments );
			}

			function _superApply( args ) {
				return base.prototype[ prop ].apply( this, args );
			}

			return function() {
				var __super = this._super;
				var __superApply = this._superApply;
				var returnValue;

				this._super = _super;
				this._superApply = _superApply;

				returnValue = value.apply( this, arguments );

				this._super = __super;
				this._superApply = __superApply;

				return returnValue;
			};
		} )();
	} );
	constructor.prototype = $.widget.extend( basePrototype, {

		// TODO: remove support for widgetEventPrefix
		// always use the name + a colon as the prefix, e.g., draggable:start
		// don't prefix for widgets that aren't DOM-based
		widgetEventPrefix: existingConstructor ? ( basePrototype.widgetEventPrefix || name ) : name
	}, proxiedPrototype, {
		constructor: constructor,
		namespace: namespace,
		widgetName: name,
		widgetFullName: fullName
	} );

	// If this widget is being redefined then we need to find all widgets that
	// are inheriting from it and redefine all of them so that they inherit from
	// the new version of this widget. We're essentially trying to replace one
	// level in the prototype chain.
	if ( existingConstructor ) {
		$.each( existingConstructor._childConstructors, function( i, child ) {
			var childPrototype = child.prototype;

			// Redefine the child widget using the same prototype that was
			// originally used, but inherit from the new version of the base
			$.widget( childPrototype.namespace + "." + childPrototype.widgetName, constructor,
				child._proto );
		} );

		// Remove the list of existing child constructors from the old constructor
		// so the old child constructors can be garbage collected
		delete existingConstructor._childConstructors;
	} else {
		base._childConstructors.push( constructor );
	}

	$.widget.bridge( name, constructor );

	return constructor;
};

$.widget.extend = function( target ) {
	var input = widgetSlice.call( arguments, 1 );
	var inputIndex = 0;
	var inputLength = input.length;
	var key;
	var value;

	for ( ; inputIndex < inputLength; inputIndex++ ) {
		for ( key in input[ inputIndex ] ) {
			value = input[ inputIndex ][ key ];
			if ( input[ inputIndex ].hasOwnProperty( key ) && value !== undefined ) {

				// Clone objects
				if ( $.isPlainObject( value ) ) {
					target[ key ] = $.isPlainObject( target[ key ] ) ?
						$.widget.extend( {}, target[ key ], value ) :

						// Don't extend strings, arrays, etc. with objects
						$.widget.extend( {}, value );

				// Copy everything else by reference
				} else {
					target[ key ] = value;
				}
			}
		}
	}
	return target;
};

$.widget.bridge = function( name, object ) {
	var fullName = object.prototype.widgetFullName || name;
	$.fn[ name ] = function( options ) {
		var isMethodCall = typeof options === "string";
		var args = widgetSlice.call( arguments, 1 );
		var returnValue = this;

		if ( isMethodCall ) {

			// If this is an empty collection, we need to have the instance method
			// return undefined instead of the jQuery instance
			if ( !this.length && options === "instance" ) {
				returnValue = undefined;
			} else {
				this.each( function() {
					var methodValue;
					var instance = $.data( this, fullName );

					if ( options === "instance" ) {
						returnValue = instance;
						return false;
					}

					if ( !instance ) {
						return $.error( "cannot call methods on " + name +
							" prior to initialization; " +
							"attempted to call method '" + options + "'" );
					}

					if ( !$.isFunction( instance[ options ] ) || options.charAt( 0 ) === "_" ) {
						return $.error( "no such method '" + options + "' for " + name +
							" widget instance" );
					}

					methodValue = instance[ options ].apply( instance, args );

					if ( methodValue !== instance && methodValue !== undefined ) {
						returnValue = methodValue && methodValue.jquery ?
							returnValue.pushStack( methodValue.get() ) :
							methodValue;
						return false;
					}
				} );
			}
		} else {

			// Allow multiple hashes to be passed on init
			if ( args.length ) {
				options = $.widget.extend.apply( null, [ options ].concat( args ) );
			}

			this.each( function() {
				var instance = $.data( this, fullName );
				if ( instance ) {
					instance.option( options || {} );
					if ( instance._init ) {
						instance._init();
					}
				} else {
					$.data( this, fullName, new object( options, this ) );
				}
			} );
		}

		return returnValue;
	};
};

$.Widget = function( /* options, element */ ) {};
$.Widget._childConstructors = [];

$.Widget.prototype = {
	widgetName: "widget",
	widgetEventPrefix: "",
	defaultElement: "<div>",

	options: {
		classes: {},
		disabled: false,

		// Callbacks
		create: null
	},

	_createWidget: function( options, element ) {
		element = $( element || this.defaultElement || this )[ 0 ];
		this.element = $( element );
		this.uuid = widgetUuid++;
		this.eventNamespace = "." + this.widgetName + this.uuid;

		this.bindings = $();
		this.hoverable = $();
		this.focusable = $();
		this.classesElementLookup = {};

		if ( element !== this ) {
			$.data( element, this.widgetFullName, this );
			this._on( true, this.element, {
				remove: function( event ) {
					if ( event.target === element ) {
						this.destroy();
					}
				}
			} );
			this.document = $( element.style ?

				// Element within the document
				element.ownerDocument :

				// Element is window or document
				element.document || element );
			this.window = $( this.document[ 0 ].defaultView || this.document[ 0 ].parentWindow );
		}

		this.options = $.widget.extend( {},
			this.options,
			this._getCreateOptions(),
			options );

		this._create();

		if ( this.options.disabled ) {
			this._setOptionDisabled( this.options.disabled );
		}

		this._trigger( "create", null, this._getCreateEventData() );
		this._init();
	},

	_getCreateOptions: function() {
		return {};
	},

	_getCreateEventData: $.noop,

	_create: $.noop,

	_init: $.noop,

	destroy: function() {
		var that = this;

		this._destroy();
		$.each( this.classesElementLookup, function( key, value ) {
			that._removeClass( value, key );
		} );

		// We can probably remove the unbind calls in 2.0
		// all event bindings should go through this._on()
		this.element
			.off( this.eventNamespace )
			.removeData( this.widgetFullName );
		this.widget()
			.off( this.eventNamespace )
			.removeAttr( "aria-disabled" );

		// Clean up events and states
		this.bindings.off( this.eventNamespace );
	},

	_destroy: $.noop,

	widget: function() {
		return this.element;
	},

	option: function( key, value ) {
		var options = key;
		var parts;
		var curOption;
		var i;

		if ( arguments.length === 0 ) {

			// Don't return a reference to the internal hash
			return $.widget.extend( {}, this.options );
		}

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

			// Handle nested keys, e.g., "foo.bar" => { foo: { bar: ___ } }
			options = {};
			parts = key.split( "." );
			key = parts.shift();
			if ( parts.length ) {
				curOption = options[ key ] = $.widget.extend( {}, this.options[ key ] );
				for ( i = 0; i < parts.length - 1; i++ ) {
					curOption[ parts[ i ] ] = curOption[ parts[ i ] ] || {};
					curOption = curOption[ parts[ i ] ];
				}
				key = parts.pop();
				if ( arguments.length === 1 ) {
					return curOption[ key ] === undefined ? null : curOption[ key ];
				}
				curOption[ key ] = value;
			} else {
				if ( arguments.length === 1 ) {
					return this.options[ key ] === undefined ? null : this.options[ key ];
				}
				options[ key ] = value;
			}
		}

		this._setOptions( options );

		return this;
	},

	_setOptions: function( options ) {
		var key;

		for ( key in options ) {
			this._setOption( key, options[ key ] );
		}

		return this;
	},

	_setOption: function( key, value ) {
		if ( key === "classes" ) {
			this._setOptionClasses( value );
		}

		this.options[ key ] = value;

		if ( key === "disabled" ) {
			this._setOptionDisabled( value );
		}

		return this;
	},

	_setOptionClasses: function( value ) {
		var classKey, elements, currentElements;

		for ( classKey in value ) {
			currentElements = this.classesElementLookup[ classKey ];
			if ( value[ classKey ] === this.options.classes[ classKey ] ||
					!currentElements ||
					!currentElements.length ) {
				continue;
			}

			// We are doing this to create a new jQuery object because the _removeClass() call
			// on the next line is going to destroy the reference to the current elements being
			// tracked. We need to save a copy of this collection so that we can add the new classes
			// below.
			elements = $( currentElements.get() );
			this._removeClass( currentElements, classKey );

			// We don't use _addClass() here, because that uses this.options.classes
			// for generating the string of classes. We want to use the value passed in from
			// _setOption(), this is the new value of the classes option which was passed to
			// _setOption(). We pass this value directly to _classes().
			elements.addClass( this._classes( {
				element: elements,
				keys: classKey,
				classes: value,
				add: true
			} ) );
		}
	},

	_setOptionDisabled: function( value ) {
		this._toggleClass( this.widget(), this.widgetFullName + "-disabled", null, !!value );

		// If the widget is becoming disabled, then nothing is interactive
		if ( value ) {
			this._removeClass( this.hoverable, null, "ui-state-hover" );
			this._removeClass( this.focusable, null, "ui-state-focus" );
		}
	},

	enable: function() {
		return this._setOptions( { disabled: false } );
	},

	disable: function() {
		return this._setOptions( { disabled: true } );
	},

	_classes: function( options ) {
		var full = [];
		var that = this;

		options = $.extend( {
			element: this.element,
			classes: this.options.classes || {}
		}, options );

		function processClassString( classes, checkOption ) {
			var current, i;
			for ( i = 0; i < classes.length; i++ ) {
				current = that.classesElementLookup[ classes[ i ] ] || $();
				if ( options.add ) {
					current = $( $.unique( current.get().concat( options.element.get() ) ) );
				} else {
					current = $( current.not( options.element ).get() );
				}
				that.classesElementLookup[ classes[ i ] ] = current;
				full.push( classes[ i ] );
				if ( checkOption && options.classes[ classes[ i ] ] ) {
					full.push( options.classes[ classes[ i ] ] );
				}
			}
		}

		this._on( options.element, {
			"remove": "_untrackClassesElement"
		} );

		if ( options.keys ) {
			processClassString( options.keys.match( /\S+/g ) || [], true );
		}
		if ( options.extra ) {
			processClassString( options.extra.match( /\S+/g ) || [] );
		}

		return full.join( " " );
	},

	_untrackClassesElement: function( event ) {
		var that = this;
		$.each( that.classesElementLookup, function( key, value ) {
			if ( $.inArray( event.target, value ) !== -1 ) {
				that.classesElementLookup[ key ] = $( value.not( event.target ).get() );
			}
		} );
	},

	_removeClass: function( element, keys, extra ) {
		return this._toggleClass( element, keys, extra, false );
	},

	_addClass: function( element, keys, extra ) {
		return this._toggleClass( element, keys, extra, true );
	},

	_toggleClass: function( element, keys, extra, add ) {
		add = ( typeof add === "boolean" ) ? add : extra;
		var shift = ( typeof element === "string" || element === null ),
			options = {
				extra: shift ? keys : extra,
				keys: shift ? element : keys,
				element: shift ? this.element : element,
				add: add
			};
		options.element.toggleClass( this._classes( options ), add );
		return this;
	},

	_on: function( suppressDisabledCheck, element, handlers ) {
		var delegateElement;
		var instance = this;

		// No suppressDisabledCheck flag, shuffle arguments
		if ( typeof suppressDisabledCheck !== "boolean" ) {
			handlers = element;
			element = suppressDisabledCheck;
			suppressDisabledCheck = false;
		}

		// No element argument, shuffle and use this.element
		if ( !handlers ) {
			handlers = element;
			element = this.element;
			delegateElement = this.widget();
		} else {
			element = delegateElement = $( element );
			this.bindings = this.bindings.add( element );
		}

		$.each( handlers, function( event, handler ) {
			function handlerProxy() {

				// Allow widgets to customize the disabled handling
				// - disabled as an array instead of boolean
				// - disabled class as method for disabling individual parts
				if ( !suppressDisabledCheck &&
						( instance.options.disabled === true ||
						$( this ).hasClass( "ui-state-disabled" ) ) ) {
					return;
				}
				return ( typeof handler === "string" ? instance[ handler ] : handler )
					.apply( instance, arguments );
			}

			// Copy the guid so direct unbinding works
			if ( typeof handler !== "string" ) {
				handlerProxy.guid = handler.guid =
					handler.guid || handlerProxy.guid || $.guid++;
			}

			var match = event.match( /^([\w:-]*)\s*(.*)$/ );
			var eventName = match[ 1 ] + instance.eventNamespace;
			var selector = match[ 2 ];

			if ( selector ) {
				delegateElement.on( eventName, selector, handlerProxy );
			} else {
				element.on( eventName, handlerProxy );
			}
		} );
	},

	_off: function( element, eventName ) {
		eventName = ( eventName || "" ).split( " " ).join( this.eventNamespace + " " ) +
			this.eventNamespace;
		element.off( eventName ).off( eventName );

		// Clear the stack to avoid memory leaks (#10056)
		this.bindings = $( this.bindings.not( element ).get() );
		this.focusable = $( this.focusable.not( element ).get() );
		this.hoverable = $( this.hoverable.not( element ).get() );
	},

	_delay: function( handler, delay ) {
		function handlerProxy() {
			return ( typeof handler === "string" ? instance[ handler ] : handler )
				.apply( instance, arguments );
		}
		var instance = this;
		return setTimeout( handlerProxy, delay || 0 );
	},

	_hoverable: function( element ) {
		this.hoverable = this.hoverable.add( element );
		this._on( element, {
			mouseenter: function( event ) {
				this._addClass( $( event.currentTarget ), null, "ui-state-hover" );
			},
			mouseleave: function( event ) {
				this._removeClass( $( event.currentTarget ), null, "ui-state-hover" );
			}
		} );
	},

	_focusable: function( element ) {
		this.focusable = this.focusable.add( element );
		this._on( element, {
			focusin: function( event ) {
				this._addClass( $( event.currentTarget ), null, "ui-state-focus" );
			},
			focusout: function( event ) {
				this._removeClass( $( event.currentTarget ), null, "ui-state-focus" );
			}
		} );
	},

	_trigger: function( type, event, data ) {
		var prop, orig;
		var callback = this.options[ type ];

		data = data || {};
		event = $.Event( event );
		event.type = ( type === this.widgetEventPrefix ?
			type :
			this.widgetEventPrefix + type ).toLowerCase();

		// The original event may come from any element
		// so we need to reset the target on the new event
		event.target = this.element[ 0 ];

		// Copy original event properties over to the new event
		orig = event.originalEvent;
		if ( orig ) {
			for ( prop in orig ) {
				if ( !( prop in event ) ) {
					event[ prop ] = orig[ prop ];
				}
			}
		}

		this.element.trigger( event, data );
		return !( $.isFunction( callback ) &&
			callback.apply( this.element[ 0 ], [ event ].concat( data ) ) === false ||
			event.isDefaultPrevented() );
	}
};

$.each( { show: "fadeIn", hide: "fadeOut" }, function( method, defaultEffect ) {
	$.Widget.prototype[ "_" + method ] = function( element, options, callback ) {
		if ( typeof options === "string" ) {
			options = { effect: options };
		}

		var hasOptions;
		var effectName = !options ?
			method :
			options === true || typeof options === "number" ?
				defaultEffect :
				options.effect || defaultEffect;

		options = options || {};
		if ( typeof options === "number" ) {
			options = { duration: options };
		}

		hasOptions = !$.isEmptyObject( options );
		options.complete = callback;

		if ( options.delay ) {
			element.delay( options.delay );
		}

		if ( hasOptions && $.effects && $.effects.effect[ effectName ] ) {
			element[ method ]( options );
		} else if ( effectName !== method && element[ effectName ] ) {
			element[ effectName ]( options.duration, options.easing, callback );
		} else {
			element.queue( function( next ) {
				$( this )[ method ]();
				if ( callback ) {
					callback.call( element[ 0 ] );
				}
				next();
			} );
		}
	};
} );

var widget = $.widget;


/*!
 * jQuery UI Keycode 1.12.1
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 */

//>>label: Keycode
//>>group: Core
//>>description: Provide keycodes as keynames
//>>docs: http://api.jqueryui.com/jQuery.ui.keyCode/


var keycode = $.ui.keyCode = {
	BACKSPACE: 8,
	COMMA: 188,
	DELETE: 46,
	DOWN: 40,
	END: 35,
	ENTER: 13,
	ESCAPE: 27,
	HOME: 36,
	LEFT: 37,
	PAGE_DOWN: 34,
	PAGE_UP: 33,
	PERIOD: 190,
	RIGHT: 39,
	SPACE: 32,
	TAB: 9,
	UP: 38
};


/*!
 * jQuery UI Unique ID 1.12.1
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 */

//>>label: uniqueId
//>>group: Core
//>>description: Functions to generate and remove uniqueId's
//>>docs: http://api.jqueryui.com/uniqueId/


var uniqueId = $.fn.extend( {
	uniqueId: ( function() {
		var uuid = 0;

		return function() {
			return this.each( function() {
				if ( !this.id ) {
					this.id = "ui-id-" + ( ++uuid );
				}
			} );
		};
	} )(),

	removeUniqueId: function() {
		return this.each( function() {
			if ( /^ui-id-\d+$/.test( this.id ) ) {
				$( this ).removeAttr( "id" );
			}
		} );
	}
} );


// Internal use only
var escapeSelector = $.ui.escapeSelector = ( function() {
	var selectorEscape = /([!"#$%&'()*+,./:;<=>?@[\]^`{|}~])/g;
	return function( selector ) {
		return selector.replace( selectorEscape, "\\$1" );
	};
} )();


var safeActiveElement = $.ui.safeActiveElement = function( document ) {
	var activeElement;

	// Support: IE 9 only
	// IE9 throws an "Unspecified error" accessing document.activeElement from an <iframe>
	try {
		activeElement = document.activeElement;
	} catch ( error ) {
		activeElement = document.body;
	}

	// Support: IE 9 - 11 only
	// IE may return null instead of an element
	// Interestingly, this only seems to occur when NOT in an iframe
	if ( !activeElement ) {
		activeElement = document.body;
	}

	// Support: IE 11 only
	// IE11 returns a seemingly empty object in some cases when accessing
	// document.activeElement from an <iframe>
	if ( !activeElement.nodeName ) {
		activeElement = document.body;
	}

	return activeElement;
};


/*!
 * jQuery UI Tabs 1.12.1
 * http://jqueryui.com
 *
 * Copyright jQuery Foundation and other contributors
 * Released under the MIT license.
 * http://jquery.org/license
 */

//>>label: Tabs
//>>group: Widgets
//>>description: Transforms a set of container elements into a tab structure.
//>>docs: http://api.jqueryui.com/tabs/
//>>demos: http://jqueryui.com/tabs/
//>>css.structure: ../../themes/base/core.css
//>>css.structure: ../../themes/base/tabs.css
//>>css.theme: ../../themes/base/theme.css


$.widget( "ui.tabs", {
	version: "1.12.1",
	delay: 300,
	options: {
		active: null,
		classes: {
			"ui-tabs": "ui-corner-all",
			"ui-tabs-nav": "ui-corner-all",
			"ui-tabs-panel": "ui-corner-bottom",
			"ui-tabs-tab": "ui-corner-top"
		},
		collapsible: false,
		event: "click",
		heightStyle: "content",
		hide: null,
		show: null,

		// Callbacks
		activate: null,
		beforeActivate: null,
		beforeLoad: null,
		load: null
	},

	_isLocal: ( function() {
		var rhash = /#.*$/;

		return function( anchor ) {
			var anchorUrl, locationUrl;

			anchorUrl = anchor.href.replace( rhash, "" );
			locationUrl = location.href.replace( rhash, "" );

			// Decoding may throw an error if the URL isn't UTF-8 (#9518)
			try {
				anchorUrl = decodeURIComponent( anchorUrl );
			} catch ( error ) {}
			try {
				locationUrl = decodeURIComponent( locationUrl );
			} catch ( error ) {}

			return anchor.hash.length > 1 && anchorUrl === locationUrl;
		};
	} )(),

	_create: function() {
		var that = this,
			options = this.options;

		this.running = false;

		this._addClass( "ui-tabs", "ui-widget ui-widget-content" );
		this._toggleClass( "ui-tabs-collapsible", null, options.collapsible );

		this._processTabs();
		options.active = this._initialActive();

		// Take disabling tabs via class attribute from HTML
		// into account and update option properly.
		if ( $.isArray( options.disabled ) ) {
			options.disabled = $.unique( options.disabled.concat(
				$.map( this.tabs.filter( ".ui-state-disabled" ), function( li ) {
					return that.tabs.index( li );
				} )
			) ).sort();
		}

		// Check for length avoids error when initializing empty list
		if ( this.options.active !== false && this.anchors.length ) {
			this.active = this._findActive( options.active );
		} else {
			this.active = $();
		}

		this._refresh();

		if ( this.active.length ) {
			this.load( options.active );
		}
	},

	_initialActive: function() {
		var active = this.options.active,
			collapsible = this.options.collapsible,
			locationHash = location.hash.substring( 1 );

		if ( active === null ) {

			// check the fragment identifier in the URL
			if ( locationHash ) {
				this.tabs.each( function( i, tab ) {
					if ( $( tab ).attr( "aria-controls" ) === locationHash ) {
						active = i;
						return false;
					}
				} );
			}

			// Check for a tab marked active via a class
			if ( active === null ) {
				active = this.tabs.index( this.tabs.filter( ".ui-tabs-active" ) );
			}

			// No active tab, set to false
			if ( active === null || active === -1 ) {
				active = this.tabs.length ? 0 : false;
			}
		}

		// Handle numbers: negative, out of range
		if ( active !== false ) {
			active = this.tabs.index( this.tabs.eq( active ) );
			if ( active === -1 ) {
				active = collapsible ? false : 0;
			}
		}

		// Don't allow collapsible: false and active: false
		if ( !collapsible && active === false && this.anchors.length ) {
			active = 0;
		}

		return active;
	},

	_getCreateEventData: function() {
		return {
			tab: this.active,
			panel: !this.active.length ? $() : this._getPanelForTab( this.active )
		};
	},

	_tabKeydown: function( event ) {
		var focusedTab = $( $.ui.safeActiveElement( this.document[ 0 ] ) ).closest( "li" ),
			selectedIndex = this.tabs.index( focusedTab ),
			goingForward = true;

		if ( this._handlePageNav( event ) ) {
			return;
		}

		switch ( event.keyCode ) {
		case $.ui.keyCode.RIGHT:
		case $.ui.keyCode.DOWN:
			selectedIndex++;
			break;
		case $.ui.keyCode.UP:
		case $.ui.keyCode.LEFT:
			goingForward = false;
			selectedIndex--;
			break;
		case $.ui.keyCode.END:
			selectedIndex = this.anchors.length - 1;
			break;
		case $.ui.keyCode.HOME:
			selectedIndex = 0;
			break;
		case $.ui.keyCode.SPACE:

			// Activate only, no collapsing
			event.preventDefault();
			clearTimeout( this.activating );
			this._activate( selectedIndex );
			return;
		case $.ui.keyCode.ENTER:

			// Toggle (cancel delayed activation, allow collapsing)
			event.preventDefault();
			clearTimeout( this.activating );

			// Determine if we should collapse or activate
			this._activate( selectedIndex === this.options.active ? false : selectedIndex );
			return;
		default:
			return;
		}

		// Focus the appropriate tab, based on which key was pressed
		event.preventDefault();
		clearTimeout( this.activating );
		selectedIndex = this._focusNextTab( selectedIndex, goingForward );

		// Navigating with control/command key will prevent automatic activation
		if ( !event.ctrlKey && !event.metaKey ) {

			// Update aria-selected immediately so that AT think the tab is already selected.
			// Otherwise AT may confuse the user by stating that they need to activate the tab,
			// but the tab will already be activated by the time the announcement finishes.
			focusedTab.attr( "aria-selected", "false" );
			this.tabs.eq( selectedIndex ).attr( "aria-selected", "true" );

			this.activating = this._delay( function() {
				this.option( "active", selectedIndex );
			}, this.delay );
		}
	},

	_panelKeydown: function( event ) {
		if ( this._handlePageNav( event ) ) {
			return;
		}

		// Ctrl+up moves focus to the current tab
		if ( event.ctrlKey && event.keyCode === $.ui.keyCode.UP ) {
			event.preventDefault();
			this.active.trigger( "focus" );
		}
	},

	// Alt+page up/down moves focus to the previous/next tab (and activates)
	_handlePageNav: function( event ) {
		if ( event.altKey && event.keyCode === $.ui.keyCode.PAGE_UP ) {
			this._activate( this._focusNextTab( this.options.active - 1, false ) );
			return true;
		}
		if ( event.altKey && event.keyCode === $.ui.keyCode.PAGE_DOWN ) {
			this._activate( this._focusNextTab( this.options.active + 1, true ) );
			return true;
		}
	},

	_findNextTab: function( index, goingForward ) {
		var lastTabIndex = this.tabs.length - 1;

		function constrain() {
			if ( index > lastTabIndex ) {
				index = 0;
			}
			if ( index < 0 ) {
				index = lastTabIndex;
			}
			return index;
		}

		while ( $.inArray( constrain(), this.options.disabled ) !== -1 ) {
			index = goingForward ? index + 1 : index - 1;
		}

		return index;
	},

	_focusNextTab: function( index, goingForward ) {
		index = this._findNextTab( index, goingForward );
		this.tabs.eq( index ).trigger( "focus" );
		return index;
	},

	_setOption: function( key, value ) {
		if ( key === "active" ) {

			// _activate() will handle invalid values and update this.options
			this._activate( value );
			return;
		}

		this._super( key, value );

		if ( key === "collapsible" ) {
			this._toggleClass( "ui-tabs-collapsible", null, value );

			// Setting collapsible: false while collapsed; open first panel
			if ( !value && this.options.active === false ) {
				this._activate( 0 );
			}
		}

		if ( key === "event" ) {
			this._setupEvents( value );
		}

		if ( key === "heightStyle" ) {
			this._setupHeightStyle( value );
		}
	},

	_sanitizeSelector: function( hash ) {
		return hash ? hash.replace( /[!"$%&'()*+,.\/:;<=>?@\[\]\^`{|}~]/g, "\\$&" ) : "";
	},

	refresh: function() {
		var options = this.options,
			lis = this.tablist.children( ":has(a[href])" );

		// Get disabled tabs from class attribute from HTML
		// this will get converted to a boolean if needed in _refresh()
		options.disabled = $.map( lis.filter( ".ui-state-disabled" ), function( tab ) {
			return lis.index( tab );
		} );

		this._processTabs();

		// Was collapsed or no tabs
		if ( options.active === false || !this.anchors.length ) {
			options.active = false;
			this.active = $();

		// was active, but active tab is gone
		} else if ( this.active.length && !$.contains( this.tablist[ 0 ], this.active[ 0 ] ) ) {

			// all remaining tabs are disabled
			if ( this.tabs.length === options.disabled.length ) {
				options.active = false;
				this.active = $();

			// activate previous tab
			} else {
				this._activate( this._findNextTab( Math.max( 0, options.active - 1 ), false ) );
			}

		// was active, active tab still exists
		} else {

			// make sure active index is correct
			options.active = this.tabs.index( this.active );
		}

		this._refresh();
	},

	_refresh: function() {
		this._setOptionDisabled( this.options.disabled );
		this._setupEvents( this.options.event );
		this._setupHeightStyle( this.options.heightStyle );

		this.tabs.not( this.active ).attr( {
			"aria-selected": "false",
			"aria-expanded": "false",
			tabIndex: -1
		} );
		this.panels.not( this._getPanelForTab( this.active ) )
			.hide()
			.attr( {
				"aria-hidden": "true"
			} );

		// Make sure one tab is in the tab order
		if ( !this.active.length ) {
			this.tabs.eq( 0 ).attr( "tabIndex", 0 );
		} else {
			this.active
				.attr( {
					"aria-selected": "true",
					"aria-expanded": "true",
					tabIndex: 0
				} );
			this._addClass( this.active, "ui-tabs-active", "ui-state-active" );
			this._getPanelForTab( this.active )
				.show()
				.attr( {
					"aria-hidden": "false"
				} );
		}
	},

	_processTabs: function() {
		var that = this,
			prevTabs = this.tabs,
			prevAnchors = this.anchors,
			prevPanels = this.panels;

		this.tablist = this._getList().attr( "role", "tablist" );
		this._addClass( this.tablist, "ui-tabs-nav",
			"ui-helper-reset ui-helper-clearfix ui-widget-header" );

		// Prevent users from focusing disabled tabs via click
		this.tablist
			.on( "mousedown" + this.eventNamespace, "> li", function( event ) {
				if ( $( this ).is( ".ui-state-disabled" ) ) {
					event.preventDefault();
				}
			} )

			// Support: IE <9
			// Preventing the default action in mousedown doesn't prevent IE
			// from focusing the element, so if the anchor gets focused, blur.
			// We don't have to worry about focusing the previously focused
			// element since clicking on a non-focusable element should focus
			// the body anyway.
			.on( "focus" + this.eventNamespace, ".ui-tabs-anchor", function() {
				if ( $( this ).closest( "li" ).is( ".ui-state-disabled" ) ) {
					this.blur();
				}
			} );

		this.tabs = this.tablist.find( "> li:has(a[href])" )
			.attr( {
				role: "tab",
				tabIndex: -1
			} );
		this._addClass( this.tabs, "ui-tabs-tab", "ui-state-default" );

		this.anchors = this.tabs.map( function() {
			return $( "a", this )[ 0 ];
		} )
			.attr( {
				role: "presentation",
				tabIndex: -1
			} );
		this._addClass( this.anchors, "ui-tabs-anchor" );

		this.panels = $();

		this.anchors.each( function( i, anchor ) {
			var selector, panel, panelId,
				anchorId = $( anchor ).uniqueId().attr( "id" ),
				tab = $( anchor ).closest( "li" ),
				originalAriaControls = tab.attr( "aria-controls" );

			// Inline tab
			if ( that._isLocal( anchor ) ) {
				selector = anchor.hash;
				panelId = selector.substring( 1 );
				panel = that.element.find( that._sanitizeSelector( selector ) );

			// remote tab
			} else {

				// If the tab doesn't already have aria-controls,
				// generate an id by using a throw-away element
				panelId = tab.attr( "aria-controls" ) || $( {} ).uniqueId()[ 0 ].id;
				selector = "#" + panelId;
				panel = that.element.find( selector );
				if ( !panel.length ) {
					panel = that._createPanel( panelId );
					panel.insertAfter( that.panels[ i - 1 ] || that.tablist );
				}
				panel.attr( "aria-live", "polite" );
			}

			if ( panel.length ) {
				that.panels = that.panels.add( panel );
			}
			if ( originalAriaControls ) {
				tab.data( "ui-tabs-aria-controls", originalAriaControls );
			}
			tab.attr( {
				"aria-controls": panelId,
				"aria-labelledby": anchorId
			} );
			panel.attr( "aria-labelledby", anchorId );
		} );

		this.panels.attr( "role", "tabpanel" );
		this._addClass( this.panels, "ui-tabs-panel", "ui-widget-content" );

		// Avoid memory leaks (#10056)
		if ( prevTabs ) {
			this._off( prevTabs.not( this.tabs ) );
			this._off( prevAnchors.not( this.anchors ) );
			this._off( prevPanels.not( this.panels ) );
		}
	},

	// Allow overriding how to find the list for rare usage scenarios (#7715)
	_getList: function() {
		return this.tablist || this.element.find( "ol, ul" ).eq( 0 );
	},

	_createPanel: function( id ) {
		return $( "<div>" )
			.attr( "id", id )
			.data( "ui-tabs-destroy", true );
	},

	_setOptionDisabled: function( disabled ) {
		var currentItem, li, i;

		if ( $.isArray( disabled ) ) {
			if ( !disabled.length ) {
				disabled = false;
			} else if ( disabled.length === this.anchors.length ) {
				disabled = true;
			}
		}

		// Disable tabs
		for ( i = 0; ( li = this.tabs[ i ] ); i++ ) {
			currentItem = $( li );
			if ( disabled === true || $.inArray( i, disabled ) !== -1 ) {
				currentItem.attr( "aria-disabled", "true" );
				this._addClass( currentItem, null, "ui-state-disabled" );
			} else {
				currentItem.removeAttr( "aria-disabled" );
				this._removeClass( currentItem, null, "ui-state-disabled" );
			}
		}

		this.options.disabled = disabled;

		this._toggleClass( this.widget(), this.widgetFullName + "-disabled", null,
			disabled === true );
	},

	_setupEvents: function( event ) {
		var events = {};
		if ( event ) {
			$.each( event.split( " " ), function( index, eventName ) {
				events[ eventName ] = "_eventHandler";
			} );
		}

		this._off( this.anchors.add( this.tabs ).add( this.panels ) );

		// Always prevent the default action, even when disabled
		this._on( true, this.anchors, {
			click: function( event ) {
				event.preventDefault();
			}
		} );
		this._on( this.anchors, events );
		this._on( this.tabs, { keydown: "_tabKeydown" } );
		this._on( this.panels, { keydown: "_panelKeydown" } );

		this._focusable( this.tabs );
		this._hoverable( this.tabs );
	},

	_setupHeightStyle: function( heightStyle ) {
		var maxHeight,
			parent = this.element.parent();

		if ( heightStyle === "fill" ) {
			maxHeight = parent.height();
			maxHeight -= this.element.outerHeight() - this.element.height();

			this.element.siblings( ":visible" ).each( function() {
				var elem = $( this ),
					position = elem.css( "position" );

				if ( position === "absolute" || position === "fixed" ) {
					return;
				}
				maxHeight -= elem.outerHeight( true );
			} );

			this.element.children().not( this.panels ).each( function() {
				maxHeight -= $( this ).outerHeight( true );
			} );

			this.panels.each( function() {
				$( this ).height( Math.max( 0, maxHeight -
					$( this ).innerHeight() + $( this ).height() ) );
			} )
				.css( "overflow", "auto" );
		} else if ( heightStyle === "auto" ) {
			maxHeight = 0;
			this.panels.each( function() {
				maxHeight = Math.max( maxHeight, $( this ).height( "" ).height() );
			} ).height( maxHeight );
		}
	},

	_eventHandler: function( event ) {
		var options = this.options,
			active = this.active,
			anchor = $( event.currentTarget ),
			tab = anchor.closest( "li" ),
			clickedIsActive = tab[ 0 ] === active[ 0 ],
			collapsing = clickedIsActive && options.collapsible,
			toShow = collapsing ? $() : this._getPanelForTab( tab ),
			toHide = !active.length ? $() : this._getPanelForTab( active ),
			eventData = {
				oldTab: active,
				oldPanel: toHide,
				newTab: collapsing ? $() : tab,
				newPanel: toShow
			};

		event.preventDefault();

		if ( tab.hasClass( "ui-state-disabled" ) ||

				// tab is already loading
				tab.hasClass( "ui-tabs-loading" ) ||

				// can't switch durning an animation
				this.running ||

				// click on active header, but not collapsible
				( clickedIsActive && !options.collapsible ) ||

				// allow canceling activation
				( this._trigger( "beforeActivate", event, eventData ) === false ) ) {
			return;
		}

		options.active = collapsing ? false : this.tabs.index( tab );

		this.active = clickedIsActive ? $() : tab;
		if ( this.xhr ) {
			this.xhr.abort();
		}

		if ( !toHide.length && !toShow.length ) {
			$.error( "jQuery UI Tabs: Mismatching fragment identifier." );
		}

		if ( toShow.length ) {
			this.load( this.tabs.index( tab ), event );
		}
		this._toggle( event, eventData );
	},

	// Handles show/hide for selecting tabs
	_toggle: function( event, eventData ) {
		var that = this,
			toShow = eventData.newPanel,
			toHide = eventData.oldPanel;

		this.running = true;

		function complete() {
			that.running = false;
			that._trigger( "activate", event, eventData );
		}

		function show() {
			that._addClass( eventData.newTab.closest( "li" ), "ui-tabs-active", "ui-state-active" );

			if ( toShow.length && that.options.show ) {
				that._show( toShow, that.options.show, complete );
			} else {
				toShow.show();
				complete();
			}
		}

		// Start out by hiding, then showing, then completing
		if ( toHide.length && this.options.hide ) {
			this._hide( toHide, this.options.hide, function() {
				that._removeClass( eventData.oldTab.closest( "li" ),
					"ui-tabs-active", "ui-state-active" );
				show();
			} );
		} else {
			this._removeClass( eventData.oldTab.closest( "li" ),
				"ui-tabs-active", "ui-state-active" );
			toHide.hide();
			show();
		}

		toHide.attr( "aria-hidden", "true" );
		eventData.oldTab.attr( {
			"aria-selected": "false",
			"aria-expanded": "false"
		} );

		// If we're switching tabs, remove the old tab from the tab order.
		// If we're opening from collapsed state, remove the previous tab from the tab order.
		// If we're collapsing, then keep the collapsing tab in the tab order.
		if ( toShow.length && toHide.length ) {
			eventData.oldTab.attr( "tabIndex", -1 );
		} else if ( toShow.length ) {
			this.tabs.filter( function() {
				return $( this ).attr( "tabIndex" ) === 0;
			} )
				.attr( "tabIndex", -1 );
		}

		toShow.attr( "aria-hidden", "false" );
		eventData.newTab.attr( {
			"aria-selected": "true",
			"aria-expanded": "true",
			tabIndex: 0
		} );
	},

	_activate: function( index ) {
		var anchor,
			active = this._findActive( index );

		// Trying to activate the already active panel
		if ( active[ 0 ] === this.active[ 0 ] ) {
			return;
		}

		// Trying to collapse, simulate a click on the current active header
		if ( !active.length ) {
			active = this.active;
		}

		anchor = active.find( ".ui-tabs-anchor" )[ 0 ];
		this._eventHandler( {
			target: anchor,
			currentTarget: anchor,
			preventDefault: $.noop
		} );
	},

	_findActive: function( index ) {
		return index === false ? $() : this.tabs.eq( index );
	},

	_getIndex: function( index ) {

		// meta-function to give users option to provide a href string instead of a numerical index.
		if ( typeof index === "string" ) {
			index = this.anchors.index( this.anchors.filter( "[href$='" +
				$.ui.escapeSelector( index ) + "']" ) );
		}

		return index;
	},

	_destroy: function() {
		if ( this.xhr ) {
			this.xhr.abort();
		}

		this.tablist
			.removeAttr( "role" )
			.off( this.eventNamespace );

		this.anchors
			.removeAttr( "role tabIndex" )
			.removeUniqueId();

		this.tabs.add( this.panels ).each( function() {
			if ( $.data( this, "ui-tabs-destroy" ) ) {
				$( this ).remove();
			} else {
				$( this ).removeAttr( "role tabIndex " +
					"aria-live aria-busy aria-selected aria-labelledby aria-hidden aria-expanded" );
			}
		} );

		this.tabs.each( function() {
			var li = $( this ),
				prev = li.data( "ui-tabs-aria-controls" );
			if ( prev ) {
				li
					.attr( "aria-controls", prev )
					.removeData( "ui-tabs-aria-controls" );
			} else {
				li.removeAttr( "aria-controls" );
			}
		} );

		this.panels.show();

		if ( this.options.heightStyle !== "content" ) {
			this.panels.css( "height", "" );
		}
	},

	enable: function( index ) {
		var disabled = this.options.disabled;
		if ( disabled === false ) {
			return;
		}

		if ( index === undefined ) {
			disabled = false;
		} else {
			index = this._getIndex( index );
			if ( $.isArray( disabled ) ) {
				disabled = $.map( disabled, function( num ) {
					return num !== index ? num : null;
				} );
			} else {
				disabled = $.map( this.tabs, function( li, num ) {
					return num !== index ? num : null;
				} );
			}
		}
		this._setOptionDisabled( disabled );
	},

	disable: function( index ) {
		var disabled = this.options.disabled;
		if ( disabled === true ) {
			return;
		}

		if ( index === undefined ) {
			disabled = true;
		} else {
			index = this._getIndex( index );
			if ( $.inArray( index, disabled ) !== -1 ) {
				return;
			}
			if ( $.isArray( disabled ) ) {
				disabled = $.merge( [ index ], disabled ).sort();
			} else {
				disabled = [ index ];
			}
		}
		this._setOptionDisabled( disabled );
	},

	load: function( index, event ) {
		index = this._getIndex( index );
		var that = this,
			tab = this.tabs.eq( index ),
			anchor = tab.find( ".ui-tabs-anchor" ),
			panel = this._getPanelForTab( tab ),
			eventData = {
				tab: tab,
				panel: panel
			},
			complete = function( jqXHR, status ) {
				if ( status === "abort" ) {
					that.panels.stop( false, true );
				}

				that._removeClass( tab, "ui-tabs-loading" );
				panel.removeAttr( "aria-busy" );

				if ( jqXHR === that.xhr ) {
					delete that.xhr;
				}
			};

		// Not remote
		if ( this._isLocal( anchor[ 0 ] ) ) {
			return;
		}

		this.xhr = $.ajax( this._ajaxSettings( anchor, event, eventData ) );

		// Support: jQuery <1.8
		// jQuery <1.8 returns false if the request is canceled in beforeSend,
		// but as of 1.8, $.ajax() always returns a jqXHR object.
		if ( this.xhr && this.xhr.statusText !== "canceled" ) {
			this._addClass( tab, "ui-tabs-loading" );
			panel.attr( "aria-busy", "true" );

			this.xhr
				.done( function( response, status, jqXHR ) {

					// support: jQuery <1.8
					// http://bugs.jquery.com/ticket/11778
					setTimeout( function() {
						panel.html( response );
						that._trigger( "load", event, eventData );

						complete( jqXHR, status );
					}, 1 );
				} )
				.fail( function( jqXHR, status ) {

					// support: jQuery <1.8
					// http://bugs.jquery.com/ticket/11778
					setTimeout( function() {
						complete( jqXHR, status );
					}, 1 );
				} );
		}
	},

	_ajaxSettings: function( anchor, event, eventData ) {
		var that = this;
		return {

			// Support: IE <11 only
			// Strip any hash that exists to prevent errors with the Ajax request
			url: anchor.attr( "href" ).replace( /#.*$/, "" ),
			beforeSend: function( jqXHR, settings ) {
				return that._trigger( "beforeLoad", event,
					$.extend( { jqXHR: jqXHR, ajaxSettings: settings }, eventData ) );
			}
		};
	},

	_getPanelForTab: function( tab ) {
		var id = $( tab ).attr( "aria-controls" );
		return this.element.find( this._sanitizeSelector( "#" + id ) );
	}
} );

// DEPRECATED
// TODO: Switch return back to widget declaration at top of file when this is removed
if ( $.uiBackCompat !== false ) {

	// Backcompat for ui-tab class (now ui-tabs-tab)
	$.widget( "ui.tabs", $.ui.tabs, {
		_processTabs: function() {
			this._superApply( arguments );
			this._addClass( this.tabs, "ui-tab" );
		}
	} );
}

var widgetsTabs = $.ui.tabs;


}));