function getCurrentTime() { var date = new Date(); var options = { timeZone: 'Asia/Ho_Chi_Minh', hour: 'numeric', minute: 'numeric', second: 'numeric' }; var currentTime = date.toLocaleTimeString('vi-VN', options); return currentTime; } function displayCurrentTime() { var searchQuery = "giờ Việt Nam"; var userInput = window.location.search; if (userInput.indexOf(searchQuery) !== -1) { var currentTime = getCurrentTime(); document.getElementById('current-time').textContent = currentTime; } } window.onload = displayCurrentTime;