一.效果图
默认效果:

当鼠标移动到图片上时出现切换按钮:

结构:
<div>
<a> <img> <a>
<ul>嵌套<li>标记
二.代码
1.结构层(html)
1 <div> 2 <img src="1.jpg" alt="music"> 3 <a href="#" class="left"></a> 4 <a href="#" class="right"></a> 5 <ul > 6 <li class="max"></li> 7 <li></li> 8 <li></li> 9 <li></li> 10 <li></li> 11 <li></li> 12 </ul> 13 </div>
2.展示层(css)
1 <style type="text/css"> 2 *{ 3 margin:0; 4 padding:0; 5 border:0; 6 7 } 8 a{ 9 text-decoration:none; 10 font-size:30px; 11 color:#fff; 12 } 13 div{ 14 width:850px; 15 height:300px; 16 margin:50px auto; 17 position:relative; 18 19 } 20 a{ 21 float:left; 22 width:30px; 23 height:90px; 24 line-height:90px; 25 background:#333; 26 opacity:0.7; 27 border-radius:4px; 28 text-align:center; 29 display:none; 30 cursor:pointer; 31 } 32 .left{ 33 position:absolute; 34 left:-15px; 35 top:100px; 36 } 37 .right{ 38 position:absolute; 39 right:-15px; 40 top:100px; 41 } 42 div:hover a{ 43 display:block; 44 } 45 ul{ 46 width:110px; 47 height:20px; 48 background:#333; 49 opacity:0.5; 50 border-radius:8px; 51 position:absolute; 52 right:30px; 53 bottom:20px; 54 } 55 li{ 56 width:6px; 57 height:6px; 58 border-radius:50%; 59 display:inline-block; 60 background:#ccc; 61 } 62 .max{ 63 margin-left:12px; 64 width:12px; 65 boackground:orange; 66 border-radius:4px; 67 } 68 </style>

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