将下列代码改为自动轮播<script> var slideIndex = 1; showSlides(slideIndex); function plusSlides(n) { showSlides(slideIndex += n); } function currentSlide(n) { showSlides(slideIndex = n); } function showSlides(n) { var i; var slides = document.getElementsByClassName("mySlides"); var dots = document.getElementsByClassName("dot"); if (n > slides.length) {slideIndex = 1} if (n < 1) {slideIndex = slides.length} for (i = 0; i < slides.length; i++) { slides[i].style.display = "none"; } for (i = 0; i < dots.length; i++) { dots[i].className = dots[i].className.replace(" active", ""); } slides[slideIndex-1].style.display = "block"; dots[slideIndex-1].className += " active"; slideIndex++; if (slideIndex > slides.length) {slideIndex = 1} setTimeout(showSlides, 1000); } </script>

以下是将代码改为自动轮播后的代码：

<script>
    var slideIndex = 1;
    showSlides(slideIndex);

    function plusSlides(n) {
        showSlides(slideIndex += n);
    }

    function currentSlide(n) {
        showSlides(slideIndex = n);
    }

    function showSlides(n) {
        var i;
        var slides = document.getElementsByClassName("mySlides");
        var dots = document.getElementsByClassName("dot");
        if (n > slides.length) {
            slideIndex = 1
        }
        if (n < 1) {
            slideIndex = slides.length
        }
        for (i = 0; i < slides.length; i++) {
            slides[i].style.display = "none";
        }
        for (i = 0; i < dots.length; i++) {
            dots[i].className = dots[i].className.replace(" active", "");
        }
        slides[slideIndex-1].style.display = "block";
        dots[slideIndex-1].className += " active";
        slideIndex++;
        if (slideIndex > slides.length) {
            slideIndex = 1
        }
        setTimeout(showSlides, 5000); // 每隔5秒自动切换图片
    }
</script>

通过将 `setTimeout()` 函数添加到 `showSlides()` 函数中，可以让每隔一定时间自动切换图片。在这个例子中，我设置了每隔 5 秒自动切换一张图片。