diff -r 346c88efed21 -r 5e2f62d02dcd wp/wp-content/themes/twentyfifteen/js/functions.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-content/themes/twentyfifteen/js/functions.js	Tue Jun 09 03:35:32 2015 +0200
@@ -0,0 +1,162 @@
+/* global screenReaderText */
+/**
+ * Theme functions file.
+ *
+ * Contains handlers for navigation and widget area.
+ */
+
+( function( $ ) {
+	var $body, $window, $sidebar, adminbarOffset, top = false,
+	    bottom = false, windowWidth, windowHeight, lastWindowPos = 0,
+	    topOffset = 0, bodyHeight, sidebarHeight, resizeTimer,
+		secondary, button;
+
+	// Add dropdown toggle that display child menu items.
+	$( '.main-navigation .menu-item-has-children > a' ).after( '<button class="dropdown-toggle" aria-expanded="false">' + screenReaderText.expand + '</button>' );
+
+	// Toggle buttons and submenu items with active children menu items.
+	$( '.main-navigation .current-menu-ancestor > button' ).addClass( 'toggle-on' );
+	$( '.main-navigation .current-menu-ancestor > .sub-menu' ).addClass( 'toggled-on' );
+
+	$( '.dropdown-toggle' ).click( function( e ) {
+		var _this = $( this );
+		e.preventDefault();
+		_this.toggleClass( 'toggle-on' );
+		_this.next( '.children, .sub-menu' ).toggleClass( 'toggled-on' );
+		_this.attr( 'aria-expanded', _this.attr( 'aria-expanded' ) === 'false' ? 'true' : 'false' );
+		_this.html( _this.html() === screenReaderText.expand ? screenReaderText.collapse : screenReaderText.expand );
+	} );
+
+	secondary = $( '#secondary' );
+	button = $( '.site-branding' ).find( '.secondary-toggle' );
+
+	// Enable menu toggle for small screens.
+	( function() {
+		var menu, widgets, social;
+		if ( ! secondary || ! button ) {
+			return;
+		}
+
+		// Hide button if there are no widgets and the menus are missing or empty.
+		menu    = secondary.find( '.nav-menu' );
+		widgets = secondary.find( '#widget-area' );
+		social  = secondary.find( '#social-navigation' );
+		if ( ! widgets.length && ! social.length && ( ! menu || ! menu.children().length ) ) {
+			button.hide();
+			return;
+		}
+
+		button.on( 'click.twentyfifteen', function() {
+			secondary.toggleClass( 'toggled-on' );
+			secondary.trigger( 'resize' );
+			$( this ).toggleClass( 'toggled-on' );
+			if ( $( this, secondary ).hasClass( 'toggled-on' ) ) {
+				$( this ).attr( 'aria-expanded', 'true' );
+				secondary.attr( 'aria-expanded', 'true' );
+			} else {
+				$( this ).attr( 'aria-expanded', 'false' );
+				secondary.attr( 'aria-expanded', 'false' );
+			}
+		} );
+	} )();
+
+	/**
+	 * @summary Add or remove ARIA attributes.
+	 * Uses jQuery's width() function to determine the size of the window and add
+	 * the default ARIA attributes for the menu toggle if it's visible.
+	 * @since Twenty Fifteen 1.1
+	 */
+	function onResizeARIA() {
+		if ( 955 > $window.width() ) {
+			button.attr( 'aria-expanded', 'false' );
+			secondary.attr( 'aria-expanded', 'false' );
+			button.attr( 'aria-controls', 'secondary' );
+		} else {
+			button.removeAttr( 'aria-expanded' );
+			secondary.removeAttr( 'aria-expanded' );
+			button.removeAttr( 'aria-controls' );
+		}
+	}
+
+	// Sidebar scrolling.
+	function resize() {
+		windowWidth = $window.width();
+
+		if ( 955 > windowWidth ) {
+			top = bottom = false;
+			$sidebar.removeAttr( 'style' );
+		}
+	}
+
+	function scroll() {
+		var windowPos = $window.scrollTop();
+
+		if ( 955 > windowWidth ) {
+			return;
+		}
+
+		sidebarHeight = $sidebar.height();
+		windowHeight  = $window.height();
+		bodyHeight    = $body.height();
+
+		if ( sidebarHeight + adminbarOffset > windowHeight ) {
+			if ( windowPos > lastWindowPos ) {
+				if ( top ) {
+					top = false;
+					topOffset = ( $sidebar.offset().top > 0 ) ? $sidebar.offset().top - adminbarOffset : 0;
+					$sidebar.attr( 'style', 'top: ' + topOffset + 'px;' );
+				} else if ( ! bottom && windowPos + windowHeight > sidebarHeight + $sidebar.offset().top && sidebarHeight + adminbarOffset < bodyHeight ) {
+					bottom = true;
+					$sidebar.attr( 'style', 'position: fixed; bottom: 0;' );
+				}
+			} else if ( windowPos < lastWindowPos ) {
+				if ( bottom ) {
+					bottom = false;
+					topOffset = ( $sidebar.offset().top > 0 ) ? $sidebar.offset().top - adminbarOffset : 0;
+					$sidebar.attr( 'style', 'top: ' + topOffset + 'px;' );
+				} else if ( ! top && windowPos + adminbarOffset < $sidebar.offset().top ) {
+					top = true;
+					$sidebar.attr( 'style', 'position: fixed;' );
+				}
+			} else {
+				top = bottom = false;
+				topOffset = ( $sidebar.offset().top > 0 ) ? $sidebar.offset().top - adminbarOffset : 0;
+				$sidebar.attr( 'style', 'top: ' + topOffset + 'px;' );
+			}
+		} else if ( ! top ) {
+			top = true;
+			$sidebar.attr( 'style', 'position: fixed;' );
+		}
+
+		lastWindowPos = windowPos;
+	}
+
+	function resizeAndScroll() {
+		resize();
+		scroll();
+	}
+
+	$( document ).ready( function() {
+		$body          = $( document.body );
+		$window        = $( window );
+		$sidebar       = $( '#sidebar' ).first();
+		adminbarOffset = $body.is( '.admin-bar' ) ? $( '#wpadminbar' ).height() : 0;
+
+		$window
+			.on( 'scroll.twentyfifteen', scroll )
+			.on( 'load.twentyfifteen', onResizeARIA )
+			.on( 'resize.twentyfifteen', function() {
+				clearTimeout( resizeTimer );
+				resizeTimer = setTimeout( resizeAndScroll, 500 );
+				onResizeARIA();
+			} );
+		$sidebar.on( 'click.twentyfifteen keydown.twentyfifteen', 'button', resizeAndScroll );
+
+		resizeAndScroll();
+
+		for ( var i = 1; i < 6; i++ ) {
+			setTimeout( resizeAndScroll, 100 * i );
+		}
+	} );
+
+} )( jQuery );