setInterval(delPhoto, 3000); function delPhoto() { a = 0; b = 1; while (a != b) { Photoview.deletePhoto(); a = cur.pvIndex; Photoview.show(false, cur.pvIndex + 1, null); b = cur.pvIndex; } } Code setInterval(delPhoto, 3000); function delPhoto() { a = 0; b = 1; while (a != b) { Photoview.deletePhoto(); a = cur.pvIndex; Photoview.show(false, cur.pvIndex + 1, null); b = cur.pvIndex; } }