let currentIndex = 0; const track = document.getElementById("slideshowTrack"); const slides = track.children; const totalSlides = slides.length; function slideTo(index) { const percent = -index * 100; track.style.transform = `translateX(${percent}%)`; } setInterval(() => { currentIndex = (currentIndex + 1) % totalSlides; slideTo(currentIndex); }, 3000); // เปลี่ยนทุก 3 วินาที