IE兼容性沒處理，確切的說不太會，還望指點一二
思路：
1、js獲取要給定點擊事件的按鈕組對象，如btns=document.xxx(),遍歷過程綁定事件之前先取得當前對象的下標eg:btns[i].index=i;
2、匹配index為將要顯示的DOM對象
3、點擊過程中要切換class，先判斷是否含有指定class，有就刪除，沒有就添加指定class。注:if(!null)為真.
4、onmouseover同理
HTML
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Title</title> <link rel="stylesheet" href="css/index.css"> <script src="js/index-banner.js"></script></head><body> <h3>javascript切換效果</h3> <section> <div> <div> <ul> <li data-i="0"><img src="img/Ferrari.png"><span>法拉利</span></li> <li data-i="1"><img src="img/Mercedes1.png"><span>奔馳</span></li> <li data-i="2"><img src="img/BMW.png"><span>寶馬</span></li> <li data-i="3"><img src="img/Audi.png"><span>奧迪</span></li> </ul> </div> <div> <!--法拉利--> <div> <img src="img/ferrari01.jpg"> <ul> <li>法拉利1</li> <li>法拉利2</li> <li>法拉利3</li> <li>法拉利4</li> </ul> </div> <!--奔馳--> <div> <img src="img/benchi01.jpg"> <ul> <li>奔馳1</li> <li>奔馳2</li> <li>奔馳3</li> <li>奔馳4</li> </ul> </div> <!--寶馬--> <div> <img src="img/baoma01.jpg"> <ul> <li>寶馬1</li> <li>寶馬2</li> <li>寶馬3</li> <li>寶馬4</li> </ul> </div> <!--奧迪--> <div> <img src="img/aodi01.jpg"> <ul> <li>奧迪1</li> <li>奧迪2</li> <li>奧迪3</li> <li>奧迪4</li> </ul> </div> </div> </div> </section></body></html>
CSS
*{ list-style: none; border:none; text-decoration: none; margin:0; padding:0; box-sizing: border-box;}h3{ text-align: center; color: dimgrey;}.baner_parent{ width: 1000px; margin:0 auto;}.will_left{ float: left;}.will_right{ float: right;}.btn_left ul li{ text-align: center; width: 160px; height:98px; background-color: darkgrey; padding: 13px 0; cursor: pointer; -webkit-transition:all .5s ease-out; -moz-transition:all .5s ease-out; -o-transition:all .5s ease-out; -ms-transition:all .5s ease-out; transition:all .5s ease-out;}.btn_left ul li.selected{ background-color: cornflowerblue;}.btn_left ul li:not(:nth-child(4)){ border-bottom: 1px solid dimgrey;}.btn_left ul li img{ width: 50px; height: 50px;}.btn_left ul li span{ display:block;}.banner_right,.banner_lists img{ width: 800px; height: 391px; position: relative;}.banner_lists{ position: absolute; height: 391px;}.banner_lists:not(:nth-child(1)){ display: none;}.banner_lists ul{ overflow: hidden; position: absolute; bottom: 0; left: 0;}.btn{ height: 33px; width: 200px; border-right: 1px solid #000; margin-top: -3px; text-align: center; line-height: 33px; background-color: darkgrey; opacity: .8; cursor: pointer; -webkit-transition:all .5s ease-out; -moz-transition:all .5s ease-out; -o-transition:all .5s ease-out; -ms-transition:all .5s ease-out; transition:all .5s ease-out;}.btn:hover,.btn.selected{ background-color: cornflowerblue;}JS
/** * Created by Administrator on 2016/4/30 0030. * blog:wjf444128852.github.io * 不支持IE */window.onload=function(){ var arrFR = ['img/ferrari01.jpg','img/ferrari02.jpg','img/ferrari03.jpg','img/ferrari04.jpg']; var arrBC = ['img/benchi01.jpg','img/benchi02.jpg','img/benchi03.jpg','img/benchi04.jpg']; var arrBM = ['img/baoma01.jpg','img/baoma02.jpg','img/baoma03.jpg','img/baoma04.jpg']; var arrAD = ['img/aodi01.jpg','img/aodi02.jpg','img/aodi03.jpg','img/aodi04.jpg']; var array = [arrFR,arrBC,arrBM,arrAD]; var btns=document.getElementsByClassName('js_btn'); var divList=document.getElementsByClassName('banner_lists'); // 品牌切換for(var i=0;i<btns.length;i++){ btns[i].index=i; btns[i].onclick=showItems; } //ClassName切換,是否含有指定class function hasClass(elem,cls){ return elem.className.match(new RegExp('(//s|^)'+cls+'(//s|$)')); } // 沒有就追加指定class function addClass(elem,cls){ if(!hasClass(elem,cls)){ elem.className+=" "+cls; } } // 有就移除指定class function removeClass(elem,cls){ if(hasClass(elem,cls)){ var reg=new RegExp('(//s|^)'+cls+'(//s|$)'); elem.className=elem.className.replace(reg,""); } } //ClassName切換,移除所有function removeAll(obj){ for (var i = 0; i < obj.length; i++) { removeClass(obj[i],"selected"); } } // DIV顯示切換function showItems(){ removeAll(btns); addClass(this,"selected"); for (var s = 0; s< divList.length; s++) { divList[s].style.display="none"; divList[this.index].style.display="block"; } willHover(this.index); } // 右邊切換按鈕效果function willHover(sum){ var hoverbtns=divList[sum].getElementsByClassName('btn'); var img=divList[sum].getElementsByTagName('img')[0]; for (var i = 0; i < hoverbtns.length; i++) { hoverbtns[i].index=i; hoverbtns[i].onmouseover=function(){ removeAll(hoverbtns); addClass(this,"selected"); var imgSrc=array[sum][this.index]; img.src=array[sum][this.index]; } } } // 默認第一次可以切換willHover(0);};以上就是本文的全部內容，希望對大家的學習有所幫助。