Tabs: Update ajax demo to use beforeLoad event instead of deprecated ajaxOptions option.

demos/tabs/ajax.html

@@ -12,13 +12,12 @@
 	<script>
 	$(function() {
 		$( "#tabs" ).tabs({
-			ajaxOptions: {
-				error: function( xhr, status, index, anchor ) {
-					var selector = $( anchor ).attr( "aria-controls" );
-					$( selector ).html(
+			beforeLoad: function( event, ui ) {
+				ui.jqXHR.error(function() {
+					ui.panel.html(
 						"Couldn't load this tab. We'll try to fix this as soon as possible. " +
 						"If this wouldn't be a demo." );
-				}
+				});
 			}
 		});
 	});