javascript 幻灯片代码(含自动播放)

CSS 代码设置上一张下一张图片的按钮及文本。

CSS 代码： * {box-sizing:border-box} body {font-family: Verdana,sans-serif;} .mySlides {display:none}

/* 幻灯片容器 */ .slideshow-container { max-width: 1000px; position: relative; margin: auto; }

/* 下一张 & 上一张 按钮 */ .prev, .next { cursor: pointer; position: absolute; top: 50%; width: auto; margin-top: -22px; padding: 16px; color: white; font-weight: bold; font-size: 18px; transition: 0.6s ease; border-radius: 0 3px 3px 0; }

/* 定位 "下一张" 按钮靠右 */ .next { right: 0; border-radius: 3px 0 0 3px; }

/* On hover, add a black background color with a little bit see-through */ .prev:hover, .next:hover { background-color: rgba(0,0,0,0.8); }

/* 标题文本 */ .text { color: #f2f2f2; font-size: 15px; padding: 8px 12px; position: absolute; bottom: 8px; width: 100%; text-align: center; }

/* 数字文本 (1/3 等) */ .numbertext { color: #f2f2f2; font-size: 12px; padding: 8px 12px; position: absolute; top: 0; }

/* 标记符号 */ .dot { cursor:pointer; height: 13px; width: 13px; margin: 0 2px; background-color: #bbb; border-radius: 50%; display: inline-block; transition: background-color 0.6s ease; }

.active, .dot:hover { background-color: #717171; }

/* 淡出动画 */ .fade { -webkit-animation-name: fade; -webkit-animation-duration: 1.5s; animation-name: fade; animation-duration: 1.5s; }

@-webkit-keyframes fade { from {opacity: .4} to {opacity: 1} }

@keyframes fade { from {opacity: .4} to {opacity: 1} } JavaScript 代码： 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"; }