/* ========================================================================
* Extends Bootstrap v3.1.1

* Copyright (c) <2015> eBay Software Foundation

* All rights reserved.

* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

* Neither the name of eBay or any of its subsidiaries or affiliates nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.

* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

* ========================================================================
*
* Updated 02/05/2019 by Matt Baer - Added an id to the title inside of carousel caption
* Updated 02/05/2019 by Matt Baer - Moved carousel play/pause button to top of carousel div container
* Updated 04/22/2019 by Matt Baer - No longer add play/pause button if there is only one slide. Also don't add labelledby if there is no header for tabs/carousels,etc.
* Updated 05/01/2022 by Matt Baer - Moved role=menuitem to the <li> instead of the inner <a> element.
*
* */


(function($) {
	"use strict";

	// GENERAL UTILITY FUNCTIONS
	// ===============================

	var uniqueId = function(prefix) {
		return (prefix || 'ui-id') + '-' + Math.floor((Math.random()*1000)+1)
	}


	var removeMultiValAttributes = function (el, attr, val) {
		var describedby = (el.attr( attr ) || "").split( /\s+/ )
			, index = $.inArray(val, describedby)
		if ( index !== -1 ) {
			describedby.splice( index, 1 )
		}
		describedby = $.trim( describedby.join( " " ) )
		if (describedby ) {
			el.attr( attr, describedby )
		} else {
			el.removeAttr( attr )
		}
	}

// selectors  Courtesy: https://github.com/jquery/jquery-ui/blob/master/ui/core.js
	var focusable = function ( element, isTabIndexNotNaN ) {
		var map, mapName, img,
			nodeName = element.nodeName.toLowerCase();
		if ( "area" === nodeName ) {
			map = element.parentNode;
			mapName = map.name;
			if ( !element.href || !mapName || map.nodeName.toLowerCase() !== "map" ) {
				return false;
			}
			img = $( "img[usemap='#" + mapName + "']" )[ 0 ];
			return !!img && visible( img );
		}
		return ( /input|select|textarea|button|object/.test( nodeName ) ?
			!element.disabled :
			"a" === nodeName ?
				element.href || isTabIndexNotNaN :isTabIndexNotNaN) && visible( element ); // the element and all of its ancestors must be visible
	}
	var visible = function ( element ) {
		return $.expr.filters.visible( element ) &&
			!$( element ).parents().addBack().filter(function() {
				return $.css( this, "visibility" ) === "hidden";
			}).length;
	}

	$.extend( $.expr[ ":" ], {
		data: $.expr.createPseudo ?
			$.expr.createPseudo(function( dataName ) {
				return function( elem ) {
					return !!$.data( elem, dataName );
				};
			}) :
			// support: jQuery <1.8
			function( elem, i, match ) {
				return !!$.data( elem, match[ 3 ] );
			},

		focusable: function( element ) {
			return focusable( element, !isNaN( $.attr( element, "tabindex" ) ) );
		},

		tabbable: function( element ) {
			var tabIndex = $.attr( element, "tabindex" ),
				isTabIndexNaN = isNaN( tabIndex );
			return ( isTabIndexNaN || tabIndex >= 0 ) && focusable( element, !isTabIndexNaN );
		}
	});

	// Modal Extension
	// ===============================

	$('.modal-dialog').attr( {'role' : 'document'})
	var modalhide =   $.fn.modal.Constructor.prototype.hide
	$.fn.modal.Constructor.prototype.hide = function(){
		var modalOpener = this.$element.parent().find('[data-target="#' + this.$element.attr('id') + '"]')
		modalhide.apply(this, arguments)
		modalOpener.focus()
		$(document).off('keydown.bs.modal')
	}

	var modalfocus =   $.fn.modal.Constructor.prototype.enforceFocus
	$.fn.modal.Constructor.prototype.enforceFocus = function(){
		var focEls = this.$element.find(":tabbable")
			, lastEl = focEls[focEls.length-1]
		$(document).on('keydown.bs.modal', $.proxy(function (ev) {
			if(!this.$element.has(ev.target).length && ev.shiftKey && ev.keyCode === 9) {
				lastEl.focus()
				ev.preventDefault();
			}
		}, this))

		modalfocus.apply(this, arguments)
	}
	// DROPDOWN Extension
	// ===============================

	var toggle   = '[data-toggle=dropdown]'
		, $par
		, firstItem
		, focusDelay = 200
		, menus = $(toggle).parent().find('ul').attr('role','menu')
		, lis = menus.find('li').attr('role','menuitem')

	lis.find('a').attr({'tabIndex':'-1'})
	$(toggle).attr({ 'aria-haspopup':'true', 'aria-expanded': 'false'})

	$(toggle).parent().on('shown.bs.dropdown',function(e){
		$par = $(this)
		var $toggle = $par.find(toggle)
		$toggle.attr('aria-expanded','true')
		$toggle.on('keydown.bs.dropdown', $.proxy(function (ev) {
			setTimeout(function(){
				firstItem = $('.dropdown-menu [role=menuitem]:visible a', $par)[0]
				try{ firstItem.focus()} catch(ex) {}
			}, focusDelay)
		}, this))

	})

	$(toggle).parent().on('hidden.bs.dropdown',function(e){
		$par = $(this)
		var $toggle = $par.find(toggle)
		$toggle.attr('aria-expanded','false')
	})

	$(document)
		.on('focusout.dropdown.data-api', '.dropdown-menu', function(e){
			var $this = $(this)
				, that = this
			setTimeout(function() {
				if(!$.contains(that, document.activeElement)){
					$this.parent().removeClass('open')
					$this.parent().find('[data-toggle=dropdown]').attr('aria-expanded','false')
				}
			}, 150)
		})
		.on('keydown.bs.dropdown.data-api', toggle + ', [role=menu]' , $.fn.dropdown.Constructor.prototype.keydown)
	// Tab Extension
	// ===============================

	var $tablist = $('.nav-tabs, .nav-pills')
		, $lis = $tablist.children('li')
		, $tabs = $tablist.find('[data-toggle="tab"], [data-toggle="pill"]')

	if($tabs){
		$tablist.attr('role', 'tablist')
		$lis.attr('role', 'presentation')
		$tabs.attr('role', 'tab')
	}

	$tabs.each(function( index ) {
		var tabpanel = $($(this).attr('href'))
			, tab = $(this)
			, tabid = tab.attr('id') || uniqueId('ui-tab')

		tab.attr('id', tabid)

		if(tab.parent().hasClass('active')){
			tab.attr( { 'tabIndex' : '0', 'aria-selected' : 'true', 'aria-controls': tab.attr('href').substr(1) } )
			tabpanel.attr({ 'role' : 'tabpanel', 'tabIndex' : '0', 'aria-hidden' : 'false' })
		} else{
			tab.attr( { 'tabIndex' : '-1', 'aria-selected' : 'false', 'aria-controls': tab.attr('href').substr(1) } )
			tabpanel.attr( { 'role' : 'tabpanel', 'tabIndex' : '-1', 'aria-hidden' : 'true' } )
		}

		if($("#"+tabid).length > 0) {
			collpanel.attr('aria-labelledby', tabid);
		}
	})

	$.fn.tab.Constructor.prototype.keydown = function (e) {
		var $this = $(this)
			, $items
			, $ul = $this.closest('ul[role=tablist] ')
			, index
			, k = e.which || e.keyCode

		$this = $(this)
		if (!/(37|38|39|40)/.test(k)) return

		$items = $ul.find('[role=tab]:visible')
		index = $items.index($items.filter(':focus'))

		if (k == 38 || k == 37) index--                         // up & left
		if (k == 39 || k == 40) index++                        // down & right


		if(index < 0) index = $items.length -1
		if(index == $items.length) index = 0

		var nextTab = $items.eq(index)
		if(nextTab.attr('role') ==='tab'){

			nextTab.tab('show')      //Comment this line for dynamically loaded tabPabels, to save Ajax requests on arrow key navigation
				.focus()
		}
		// nextTab.focus()

		e.preventDefault()
		e.stopPropagation()
	}

	$(document).on('keydown.tab.data-api','[data-toggle="tab"], [data-toggle="pill"]' , $.fn.tab.Constructor.prototype.keydown)

	var tabactivate =    $.fn.tab.Constructor.prototype.activate;
	$.fn.tab.Constructor.prototype.activate = function (element, container, callback) {
		var $active = container.find('> .active')
		$active.find('[data-toggle=tab], [data-toggle=pill]').attr({ 'tabIndex' : '-1','aria-selected' : false })
		$active.filter('.tab-pane').attr({ 'aria-hidden' : true,'tabIndex' : '-1' })

		tabactivate.apply(this, arguments)

		element.addClass('active')
		element.find('[data-toggle=tab], [data-toggle=pill]').attr({ 'tabIndex' : '0','aria-selected' : true })
		element.filter('.tab-pane').attr({ 'aria-hidden' : false,'tabIndex' : '0' })
	}

	// Collapse Extension
	// ===============================

	var $colltabs =  $('[data-toggle="collapse"]')
	$colltabs.each(function( index ) {
		var colltab = $(this)
			, collpanel = (colltab.attr('data-target')) ? $(colltab.attr('data-target')) : $(colltab.attr('href'))
			, parent  = colltab.attr('data-parent')
			, collparent = parent && $(parent)
			, collid = colltab.attr('id') || uniqueId('ui-collapse')

		colltab.attr('id', collid)

		if(collparent){
			colltab.attr({ 'role':'tab', 'aria-selected':'false', 'aria-expanded':'false' })
			$(collparent).find('div:not(.collapse,.panel-body), h4').attr('role','presentation')
			collparent.attr({ 'role' : 'tablist', 'aria-multiselectable' : 'true' })

			if(collpanel.hasClass('in')){
				colltab.attr({ 'aria-controls': collpanel.attr('id'), 'aria-selected':'true', 'aria-expanded':'true', 'tabindex':'0' })
				collpanel.attr({ 'role':'tabpanel', 'tabindex':'0', 'aria-hidden':'false' })
			}else{
				colltab.attr({'aria-controls' : collpanel.attr('id'), 'tabindex':'-1' })
				collpanel.attr({ 'role':'tabpanel', 'tabindex':'-1', 'aria-hidden':'true' })
			}
			if($("#"+collid).length > 0) {
				collpanel.attr('aria-labelledby', collid);
			}
		}
	})

	var collToggle = $.fn.collapse.Constructor.prototype.toggle
	$.fn.collapse.Constructor.prototype.toggle = function(){
		var prevTab = this.$parent && this.$parent.find('[aria-expanded="true"]') , href

		if(prevTab){
			var prevPanel = prevTab.attr('data-target') || (href = prevTab.attr('href')) && href.replace(/.*(?=#[^\s]+$)/, '')
				, $prevPanel = $(prevPanel)
				, $curPanel = this.$element
				, par = this.$parent
				, curTab

			if (this.$parent) curTab = this.$parent.find('[data-toggle=collapse][href="#' + this.$element.attr('id') + '"]')

			collToggle.apply(this, arguments)

			if ($.support.transition) {
				this.$element.one($.support.transition.end, function(){

					prevTab.attr({ 'aria-selected':'false','aria-expanded':'false', 'tabIndex':'-1' })
					$prevPanel.attr({ 'aria-hidden' : 'true','tabIndex' : '-1'})

					curTab.attr({ 'aria-selected':'true','aria-expanded':'true', 'tabIndex':'0' })

					if($curPanel.hasClass('in')){
						$curPanel.attr({ 'aria-hidden' : 'false','tabIndex' : '0' })
					}else{
						curTab.attr({ 'aria-selected':'false','aria-expanded':'false'})
						$curPanel.attr({ 'aria-hidden' : 'true','tabIndex' : '-1' })
					}
				})
			}
		}else{
			collToggle.apply(this, arguments)
		}
	}

	$.fn.collapse.Constructor.prototype.keydown = function (e) {
		var $this = $(this)
			, $items
			, $tablist = $this.closest('div[role=tablist] ')
			, index
			, k = e.which || e.keyCode

		$this = $(this)
		if (!/(32|37|38|39|40)/.test(k)) return
		if(k==32) $this.click()

		$items = $tablist.find('[role=tab]')
		index = $items.index($items.filter(':focus'))

		if (k == 38 || k == 37) index--                                        // up & left
		if (k == 39 || k == 40) index++                        // down & right
		if(index < 0) index = $items.length -1
		if(index == $items.length) index = 0

		$items.eq(index).focus()

		e.preventDefault()
		e.stopPropagation()

	}

	$(document).on('keydown.collapse.data-api','[data-toggle="collapse"]' ,  $.fn.collapse.Constructor.prototype.keydown)

// Carousel Extension
	// ===============================

	$('.carousel').each(function (index) {

		// This function positions a highlight box around the tabs in the tablist to use in focus styling

		function setTablistHighlightBox() {

			var $tab
				, offset
				, height
				, width
				, highlightBox = {}

			highlightBox.top     = 0
			highlightBox.left    = 32000
			highlightBox.height  = 0
			highlightBox.width   = 0

			for (var i = 0; i < $tabs.length; i++) {
				$tab = $tabs[i]
				offset = $($tab).offset()
				height = $($tab).height()
				width  = $($tab).width()

//            console.log(" Top: " + offset.top + " Left: " + offset.left + " Height: " + height + " Width: " + width)

				if (highlightBox.top < offset.top) {
					highlightBox.top    = Math.round(offset.top)
				}

				if (highlightBox.height < height) {
					highlightBox.height = Math.round(height)
				}

				if (highlightBox.left > offset.left) {
					highlightBox.left = Math.round(offset.left)
				}

				var w = (offset.left - highlightBox.left) + Math.round(width)

				if (highlightBox.width < w) {
					highlightBox.width = w
				}

			} // end for

//          console.log("[HIGHLIGHT]  Top: " +  highlightBox.top + " Left: " +  highlightBox.left + " Height: " +  highlightBox.height + " Width: " +  highlightBox.width)

			$tablistHighlight.style.top    = (highlightBox.top    - 2)  + 'px'
			$tablistHighlight.style.left   = (highlightBox.left   - 2)  + 'px'
			$tablistHighlight.style.height = (highlightBox.height + 7)  + 'px'
			$tablistHighlight.style.width  = (highlightBox.width  + 8)  + 'px'

		} // end function

		var $this = $(this)
			, $prev        = $this.find('[data-slide="prev"]')
			, $next        = $this.find('[data-slide="next"]')
			, $tablist    = $this.find('.carousel-indicators')
			, $tabs       = $this.find('.carousel-indicators li')
			, $tabpanels  = $this.find('.item')
			, $tabpanel
			, $tablistHighlight
			, $pauseCarousel
			, $complementaryLandmark
			, $tab
			, $is_paused = false
			, offset
			, height
			, width
			, i
			, id_title  = 'id_title'
			, id_desc   = 'id_desc'


		$tablist.attr('role', 'tablist')

		$tabs.focus(function() {
			$this.carousel('pause')
			$is_paused = true
			$pauseCarousel.innerHTML = '<span class="sr-only">Play Carousel</span>';
			$pauseCarousel.className = "carousel-pause-button fa fa-play"
			$(this).parent().addClass('active');
//          $(this).addClass('focus')
			setTablistHighlightBox()
			$($tablistHighlight).addClass('focus')
			$(this).parents('.carousel').addClass('contrast')
		})

		$tabs.blur(function(event) {
			$(this).parent().removeClass('active');
//          $(this).removeClass('focus')
			$($tablistHighlight).removeClass('focus')
			$(this).parents('.carousel').removeClass('contrast')
		})


		for (i = 0; i < $tabpanels.length; i++) {
			$tabpanel = $tabpanels[i]
			$tabpanel.setAttribute('role', 'tabpanel')
			$tabpanel.setAttribute('id', 'tabpanel-' + index + '-' + i)
			if($('#tab-' + index + '-' + i).length > 0) {
				$tabpanel.setAttribute('aria-labelledby', 'tab-' + index + '-' + i)
			}
		}

		if (typeof $this.attr('role') !== 'string') {
			$this.attr('role', 'complementary');
			$this.attr('aria-labelledby', id_title);
			$this.attr('aria-describedby', id_desc);
			$this.prepend('<p  id="' + id_desc   + '" class="sr-only">A carousel is a rotating set of images, rotation stops on keyboard focus on carousel tab controls or hovering the mouse pointer over images.  Use the tabs or the previous and next buttons to change the displayed slide.</p>')
			$this.prepend('<h2 id="' + id_title  + '" class="sr-only">Carousel content with ' + $tabpanels.length + ' slides.</h2>')
		}


		for (i = 0; i < $tabs.length; i++) {
			$tab = $tabs[i]

			$tab.setAttribute('role', 'tab')
			$tab.setAttribute('id', 'tab-' + index + '-' + i)
			$tab.setAttribute('aria-controls', 'tabpanel-' + index + '-' + i)

			var tpId = '#tabpanel-' + index + '-' + i
			var tabId = 'tab-' + index + '-' + i;
			var caption = $this.find(tpId).find('h1').text()
			var captionEle = $this.find(tpId).find('h1')

			if ((typeof caption !== 'string') || (caption.length === 0)) { caption = $this.find(tpId).find('h2').text(); captionEle = $this.find(tpId).find('h2') }
			if ((typeof caption !== 'string') || (caption.length === 0)) { caption = $this.find(tpId).find('h3').text(); captionEle = $this.find(tpId).find('h3') }
			if ((typeof caption !== 'string') || (caption.length === 0)) { caption = $this.find(tpId).find('h4').text(); captionEle = $this.find(tpId).find('h4') }
			if ((typeof caption !== 'string') || (caption.length === 0)) { caption = $this.find(tpId).find('h5').text(); captionEle = $this.find(tpId).find('h5') }
			if ((typeof caption !== 'string') || (caption.length === 0)) { caption = $this.find(tpId).find('h6').text(); captionEle = $this.find(tpId).find('h6') }
			if ((typeof caption !== 'string') || (caption.length === 0)) { caption = $this.find(tpId).text(); captionEle = $this.find(tpId) }
			if ((typeof caption !== 'string') || (caption.length === 0)) { caption = "no title"; captionEle = null; }

//          console.log("CAPTION: " + caption )

			if(typeof captionEle  !== 'undefined' && captionEle !== null) {
				//captionEle.attr('id', tabId);
			}

			var tabName = document.createElement('span')
			tabName.setAttribute('class', 'sr-only')
			tabName.innerHTML='Slide ' + (i+1)
			if (caption) tabName.innerHTML += ": " +  caption
			$tab.appendChild(tabName)

		}

		// create div for focus styling of tablist
		$tablistHighlight = document.createElement('div')
		$tablistHighlight.className = 'carousel-tablist-highlight'
		document.body.appendChild($tablistHighlight)

		// if we have tabs to play or pause
		if($tabs.length > 0) {
			// create button for screen reader users to stop rotation of carousel

			// create button for screen reader users to pause carousel for virtual mode review
			$complementaryLandmark = document.createElement('aside')
			$complementaryLandmark.className = 'carousel-pause-wrapper'
			$complementaryLandmark.setAttribute('aria-label', 'carousel pause/play control')
			$this.prepend($complementaryLandmark)

			$pauseCarousel = document.createElement('button')
			$pauseCarousel.className = "carousel-pause-button fa fa-pause"
			$pauseCarousel.innerHTML = '<span class="sr-only">Pause Carousel</span>'
			$pauseCarousel.setAttribute('title', "Pause/Play carousel button can be used by screen reader users to stop carousel animations")
			$($complementaryLandmark).append($pauseCarousel)

			$($pauseCarousel).click(function() {
				if ($is_paused) {
					$pauseCarousel.innerHTML = '<span class="sr-only">Pause Carousel</span>'
					$pauseCarousel.className = "carousel-pause-button fa fa-pause"
					$this.carousel('cycle')
					$is_paused = false
				} else {
					$pauseCarousel.innerHTML = '<span class="sr-only">Play Carousel</span>'
					$pauseCarousel.className = "carousel-pause-button fa fa-play"
					$this.carousel('pause')
					$is_paused = true
				}
			})
			$($pauseCarousel).focus(function() {
				$(this).addClass('focus')
			})

			$($pauseCarousel).blur(function() {
				$(this).removeClass('focus')
			})
		}
		setTablistHighlightBox()

		$( window ).resize(function() {
			setTablistHighlightBox()
		})

		// Add space bar behavior to prev and next buttons for SR compatibility
		$prev.attr('aria-label', 'Previous Slide')
		$prev.keydown(function(e) {
			var k = e.which || e.keyCode
			if (/(13|32)/.test(k)) {
				e.preventDefault()
				e.stopPropagation()
				$prev.trigger('click');
			}
		});

		$prev.focus(function() {
			$(this).parents('.carousel').addClass('contrast')
		})

		$prev.blur(function() {
			$(this).parents('.carousel').removeClass('contrast')
		})

		$next.attr('aria-label', 'Next Slide')
		$next.keydown(function(e) {
			var k = e.which || e.keyCode
			if (/(13|32)/.test(k)) {
				e.preventDefault()
				e.stopPropagation()
				$next.trigger('click');
			}
		});

		$next.focus(function() {
			$(this).parents('.carousel').addClass('contrast')
		})

		$next.blur(function() {
			$(this).parents('.carousel').removeClass('contrast')
		})

		$('.carousel-inner a').focus(function() {
			$(this).parents('.carousel').addClass('contrast')
		})

		$('.carousel-inner a').blur(function() {
			$(this).parents('.carousel').removeClass('contrast')
		})

		$tabs.each(function () {
			var item = $(this)
			if(item.hasClass('active')) {
				item.attr({ 'aria-selected': 'true', 'tabindex' : '0' })
			}else{
				item.attr({ 'aria-selected': 'false', 'tabindex' : '-1' })
			}
		})
	})

	var slideCarousel = $.fn.carousel.Constructor.prototype.slide
	$.fn.carousel.Constructor.prototype.slide = function (type, next) {
		var $element = this.$element
			, $active  = $element.find('[role=tabpanel].active')
			, $next    = next || $active[type]()
			, $tab
			, $tab_count = $element.find('[role=tabpanel]').length
			, $prev_side = $element.find('[data-slide="prev"]')
			, $next_side = $element.find('[data-slide="next"]')
			, $index      = 0
			, $prev_index = $tab_count -1
			, $next_index = 1
			, $id

		if ($next && $next.attr('id')) {
			$id = $next.attr('id')
			$index = $id.lastIndexOf("-")
			if ($index >= 0) $index = parseInt($id.substring($index+1), 10)

			$prev_index = $index - 1
			if ($prev_index < 1) $prev_index = $tab_count - 1

			$next_index = $index + 1
			if ($next_index >= $tab_count) $next_index = 0
		}

		$prev_side.attr('aria-label', 'Show slide ' + ($prev_index+1) + ' of ' + $tab_count)
		$next_side.attr('aria-label', 'Show slide ' + ($next_index+1) + ' of ' + $tab_count)


		slideCarousel.apply(this, arguments)

		$active
			.one('bsTransitionEnd', function () {
				var $tab

				$tab = $element.find('li[aria-controls="' + $active.attr('id') + '"]')
				if ($tab) $tab.attr({'aria-selected':false, 'tabIndex': '-1'})

				$tab = $element.find('li[aria-controls="' + $next.attr('id') + '"]')
				if ($tab) $tab.attr({'aria-selected': true, 'tabIndex': '0'})

			})
	}

	var $this;
	$.fn.carousel.Constructor.prototype.keydown = function (e) {

		$this = $this || $(this)
		if(this instanceof Node) $this = $(this)

		function selectTab(index) {
			if (index >= $tabs.length) return
			if (index < 0) return

			$carousel.carousel(index)
			setTimeout(function () {
				$tabs[index].focus()
				// $this.prev().focus()
			}, 150)
		}

		var $carousel = $(e.target).closest('.carousel')
			, $tabs      = $carousel.find('[role=tab]')
			, k = e.which || e.keyCode
			, index

		if (!/(37|38|39|40)/.test(k)) return

		index = $tabs.index($tabs.filter('.active'))
		if (k == 37 || k == 38) {                           //  Up
			index--
			selectTab(index);
		}

		if (k == 39 || k == 40) {                          // Down
			index++
			selectTab(index);
		}

		e.preventDefault()
		e.stopPropagation()
	}
	$(document).on('keydown.carousel.data-api', 'li[role=tab]', $.fn.carousel.Constructor.prototype.keydown)


})(jQuery);