Native handling of focus delegation (probably won't need, just ignore IE6 in the css for :focus)

util.js

		addInputFocus: function() {
			var handleFocus = function(event) {
				var target = event.target;

				var tagName = target.tagName;

				if (tagName) {
					tagName = tagName.toLowerCase();
				}

				var nodeType = target.type;

				if (((tagName == 'input') && (/text|password/).test(nodeType)) ||
					(tagName == 'textarea')) {

					var className = target.className;

					if (/^focus(?:in)?$/.test(event.type)) {
						if (!REGEX_CSS_FOCUS.test(className)) {
							target.className += ' focus';
						}
					}
					else {
						target.className = className.replace(REGEX_CSS_FOCUS, '');
					}

				}
			};

			var body = document.body;
			var addEvent = AUI.Env.add;

			var blur = 'blur';
			var focus = 'focus';

			if (body.attachEvent) {
				blur = 'focusout';
				focus = 'focusin';
			}

			addEvent(body, blur, handleFocus, true);
			addEvent(body, focus, handleFocus, true);

			//A.on('focus', handleFocus, document);
			//A.on('blur', handleFocus, document);
			//A.use(
			//	'aui-base',
			//	function(A) {
			//		var handleFocus = function(event) {
			//			var target = event.target;

			//			var tagName = target.get('tagName');

			//			if (tagName) {
			//				tagName = tagName.toLowerCase();
			//			}

			//			var nodeType = target.get('type');

			//			if (((tagName == 'input') && (/text|password/).test(nodeType)) ||
			//				(tagName == 'textarea')) {

			//				var action = 'addClass';

			//				if (/blur|focusout/.test(event.type)) {
			//					action = 'removeClass';
			//				}

			//				target[action]('focus');
			//			}
			//		};

			//		A.on('focus', handleFocus, document);
			//		A.on('blur', handleFocus, document);
			//	}
			//);

			Util.addInputFocus = function(){};
		},