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diff --git a/skins/Vector/vector.js b/skins/Vector/vector.js
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+/**
+ * Vector-specific scripts
+ */
+jQuery( function ( $ ) {
+	/**
+	 * Focus search input at the very end
+	 */
+	$( '#searchInput' ).attr( 'tabindex', $( document ).lastTabIndex() + 1 );
+
+	/**
+	 * Dropdown menu accessibility
+	 */
+	$( 'div.vectorMenu' ).each( function () {
+		var $el = $( this );
+		$el.find( '> h3 > a' ).parent()
+			.attr( 'tabindex', '0' )
+			// For accessibility, show the menu when the h3 is clicked (bug 24298/46486)
+			.on( 'click keypress', function ( e ) {
+				if ( e.type === 'click' || e.which === 13 ) {
+					$el.toggleClass( 'menuForceShow' );
+					e.preventDefault();
+				}
+			} )
+			// When the heading has focus, also set a class that will change the arrow icon
+			.focus( function () {
+				$el.find( '> a' ).addClass( 'vectorMenuFocus' );
+			} )
+			.blur( function () {
+				$el.find( '> a' ).removeClass( 'vectorMenuFocus' );
+			} )
+			.find( '> a:first' )
+			// As the h3 can already be focused there's no need for the link to be focusable
+			.attr( 'tabindex', '-1' );
+	} );
+
+	/**
+	 * Sidebar
+	 */
+	$( '#mw-panel > .portal:first' ).addClass( 'first' );
+
+	/**
+	 * Collapsible tabs
+	 */
+	var $cactions = $( '#p-cactions' ),
+		$tabContainer = $( '#p-views ul' ),
+		originalDropdownWidth = $cactions.width();
+
+	// Bind callback functions to animate our drop down menu in and out
+	// and then call the collapsibleTabs function on the menu
+	$tabContainer
+		.bind( 'beforeTabCollapse', function () {
+			// If the dropdown was hidden, show it
+			if ( $cactions.hasClass( 'emptyPortlet' ) ) {
+				$cactions
+					.removeClass( 'emptyPortlet' )
+					.find( 'h3' )
+						.css( 'width', '1px' ).animate( { 'width': originalDropdownWidth }, 'normal' );
+			}
+		} )
+		.bind( 'beforeTabExpand', function () {
+			// If we're removing the last child node right now, hide the dropdown
+			if ( $cactions.find( 'li' ).length === 1 ) {
+				$cactions.find( 'h3' ).animate( { 'width': '1px' }, 'normal', function () {
+					$( this ).attr( 'style', '' )
+						.parent().addClass( 'emptyPortlet' );
+				});
+			}
+		} )
+		.collapsibleTabs( {
+			expandCondition: function ( eleWidth ) {
+				// (This looks a bit awkward because we're doing expensive queries as late as possible.)
+
+				var distance = $.collapsibleTabs.calculateTabDistance();
+				// If there are at least eleWidth + 1 pixels of free space, expand.
+				// We add 1 because .width() will truncate fractional values but .offset() will not.
+				if ( distance >= eleWidth + 1 ) {
+					return true;
+				} else {
+					// Maybe we can still expand? Account for the width of the "Actions" dropdown if the
+					// expansion would hide it.
+					if ( $cactions.find( 'li' ).length === 1 ) {
+						return distance >= eleWidth + 1 - originalDropdownWidth;
+					} else {
+						return false;
+					}
+				}
+			},
+			collapseCondition: function () {
+				// (This looks a bit awkward because we're doing expensive queries as late as possible.)
+				// TODO The dropdown itself should probably "fold" to just the down-arrow (hiding the text)
+				// if it can't fit on the line?
+
+				// If there's an overlap, collapse.
+				if ( $.collapsibleTabs.calculateTabDistance() < 0 ) {
+					// But only if the width of the tab to collapse is smaller than the width of the dropdown
+					// we would have to insert. An example language where this happens is Lithuanian (lt).
+					if ( $cactions.hasClass( 'emptyPortlet' ) ) {
+						return $tabContainer.children( 'li.collapsible:last' ).width() > originalDropdownWidth;
+					} else {
+						return true;
+					}
+				} else {
+					return false;
+				}
+			}
+		} );
+} );