gistfile1.js

<aui:script>
	Liferay.provide(
		window,
		'<portlet:namespace />load',
		function(url, callback) {
			var A = AUI();

			var response = null;

			A.io.request(
				url,
				{
			        dataType: 'json',
			        sync: true,
			        on: {
			            success: function() {
			                if (callback) {
			                	callback(this.get('responseData'));
			                }
			            }
			        }
		        }
	        );
		},
		['aui-io-request']
	);

	Liferay.provide(
		window,
		'<portlet:namespace />syncSelects',
		function() {
			var A = AUI();

			new Liferay.DynamicSelect(
				[
					{
						select: '<portlet:namespace />states',
						selectData: function(callback) {
							<portlet:namespace />load('<liferay-portlet:resourceURL id="states" />', callback);
						},
						selectDesc: 'nome',
						selectId: 'id'
					},
					{
						select: '<portlet:namespace />regions',
						selectData: function(callback) {
							<portlet:namespace />load('<liferay-portlet:resourceURL id="squares" />', callback);
						},
						selectDesc: 'name',
						selectId: 'id'
					}
				]
			);
		},
		['liferay-dynamic-select']
	);

	<portlet:namespace />syncSelects();
</aui:script>