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JS 實現banner圖片輪播效果(滑鼠事件)，
一.要實現的效果
1.點擊左右可切換圖片
2.點擊小圓點 可切換圖片
二.
三.代碼
1.css
<style type="text/css">body,img,span,ul,li{margin: 0;padding: 0;}#div1{width: 600px;height: 350px;margin: 150px auto;border: 10px solid #eee;position: relative;}img{width: 600px;height: 350px;}span{display: inline-block;position: absolute;width: 50px;height: 50px;border-radius: 25px;background:rgba(0,0,0,.3); font-size: 30px;line-height: 50px;text-align: center;cursor: pointer;color: white;}span:hover{background:rgba(255,255,255,.5);color:black;transform:scale(1.3);}span#L{left: 10px;top: 150px;}span#R{right: 10px;top: 150px;}#div1 #ul{position: absolute;bottom: 10px;left: 250px;width: 125px;height: 20px;}#div1 #ul li{list-style: none;float: left;height: 20px;width: 20px;border-radius: 10px;background:rgba(255,255,255,.5); margin-right: 5px;cursor: pointer;}#div1 #ul .active{background:rgba(0,0,0,.5);}</style>
2.html
<body> <div id="div1"> <img src="" alt=""> <span id="L"><</span> <span id="R">></span> <ul id="ul"> <li></li> <li></li> <li></li> <li></li> <li></li> </ul> </div></body>
3.js
<script type="text/javascript">window.onload=function(){ var div1=document.getElementById('div1'); var oImg=div1.getElementsByTagName('img')[0]; var spanL=document.getElementById('L'); var spanR=document.getElementById('R'); var oUl=document.getElementById('ul'); var oLi=oUl.getElementsByTagName('li'); var arrImg=['img2/1.jpg','img2/2.jpg','img2/3.jpg','img2/4.jpg','img2/5.jpg']; var num=0; var oldLi=0; function fn(num) { oImg.src=arrImg[num]; } fn(0); function fnLi(num){ oLi[oldLi].className=''; oLi[num].className='active'; oldLi=num; } fnLi(0); /*點擊左右span圖片切換*/ /*點擊左右span時li切換*/ spanL.onclick=function(){ if (num<1) { num=arrImg.length-1; fn(num); fnLi(num); }else{ num--; fnLi(num); fn(num); } } spanR.onclick=function(){ if (num==arrImg.length-1) { num=0; fn(num); fnLi(num); }else{ num++; fnLi(num); fn(num); } } /*點擊li實現圖片切換*/ for (var i = 0; i < oLi.length; i++) { oLi[i].index=i; oLi[i].onclick=function(){ fn(this.index); fnLi(this.index); } }}</script>
總結
以上所述是小編給大家介紹的JS 實現banner圖片輪播效果(滑鼠事件)，希望對大家有所協助，如果大家有任何疑問請給我留言，小編會及時回複大家的。在此也非常感謝大家對幫客之家網站的支援！
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