ction hideLoading() {
            document.querySelector('.loading').style.display = 'none';
            document.getElementById('addressForm').style.display = 'block';
        }

        // Load dữ liệu JSON
        async function loadData() {
            try {
                showLoading();
                
                // Load provinces data
                const provincesResponse = await fetch('./province.json');
                if (!provincesResponse.ok) {
                    throw new Error('Kh