js實現簡單的輪播圖效果
本文實例為大家分享了js實現簡單的輪播圖效果的具體代碼，供大家參考，具體內容如下
代碼：
<!DOCTYPE html><html><head> <meta charset='utf-8' /> <title></title> <link rel='stylesheet' type='text/css' href='http://www.lshqa.cn/bcjs/css/style.css' /> <style> * { margin: 0; padding: 0; } .box { width: 100%; height: 500px; border: 1px solid; } </style> <script src='http://www.lshqa.cn/bcjs/js/new_file.js'></script></head><body> <div class='box_1'> <div class='c-banner'> <div class='banner'> <ul id='banner'> <li><img src='http://www.lshqa.cn/bcjs/img/su_ning1.png'></li> <li><img src='http://www.lshqa.cn/bcjs/img/su_ning2.png'></li> <li><img src='http://www.lshqa.cn/bcjs/img/su_ning3.png'></li> <li><img src='http://www.lshqa.cn/bcjs/img/su_ning4.png'></li> <li><img src='http://www.lshqa.cn/bcjs/img/su_ning5.png'></li> <li><img src='http://www.lshqa.cn/bcjs/img/su_ning6.png'></li> <li><img src='http://www.lshqa.cn/bcjs/img/su_ning7.png'></li> <li><img src='http://www.lshqa.cn/bcjs/img/su_ning8.png'></li> </ul> </div> <div id='nexImg'> <img src='http://www.lshqa.cn/bcjs/img/nexImg.png' /> </div> <div id='preImg'> <img src='http://www.lshqa.cn/bcjs/img/preImg.png' /> </div> <div class='jumpBtn'> <ul id='jumpBtn'> <li></li> <li></li> <li></li> <li></li> <li></li> <li></li> <li></li> </ul> </div> </div></body></html>
js:
window.onload = function() { //banner 自動播放 var oBanner = document.getElementById(’banner’); var aLi = oBanner.getElementsByTagName(’li’); var oJumpBtn = document.getElementById(’jumpBtn’); var aBtn = oJumpBtn.getElementsByTagName(’li’); var oPreImg = document.getElementById(’preImg’); var oNexImg = document.getElementById(’nexImg’); var iNow = 0; var timer = null; for (var i = 0; i < aBtn.length; i++) { aBtn[i].index = i; aBtn[i].onclick = function() { iNow = this.index; tab(); }; } function tab() { for (var i = 0; i < aBtn.length; i++) { aBtn[i].style.background = ’#ccc’; aLi[i].style.opacity = 0; } aBtn[iNow].style.background = ’#CF0F32’; aLi[iNow].style.opacity = 1; } function tick() { iNow++; if (iNow == aBtn.length) { iNow = 0; } tab(); } timer = setInterval(tick, 2000); oPreImg.onclick = function() { iNow--; if (iNow < 0) { iNow = aBtn.length - 1; } tab(); }; oNexImg.onclick = tick; oBanner.onmouseover = function() { clearInterval(timer); }; oBanner.onmouseout = function() { timer = setInterval(tick, 2000); };}
以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持好吧啦網。
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