function addAccessibilityKeys(panel) {
		function focus(type) {
			var item = panel.find(type)[0];

			if (item) {
				item.focus(true);
			}
		}

		editor.shortcuts.add('Alt+F9', '', function() {
			focus('menubar');
		});

		editor.shortcuts.add('Alt+F10', '', function() {
			focus('toolbar');
		});

		editor.shortcuts.add('Alt+F11', '', function() {
			focus('elementpath');
		});

		panel.on('cancel', function() {
			editor.focus();
		});
	}
Adds accessibility shortcut keys to panel.

@param {tinymce.ui.Panel} panel Panel to add focus to.